Patch series "cleanup on do_pages_move()", v5.
The logic in do_pages_move() is a little mess for audience to read and has
some potential error on handling the return value. Especially there are
three calls on do_move_pages_to_node() and store_status() with almost the
same form.
This patch set tries to make the code a little friendly for audience by
consolidate the calls.
This patch (of 4):
At this point, we always have i >= start. If i == start, store_status()
will return 0. So we can drop the check for i > start.
[david@redhat.com rephrase changelog]
Signed-off-by: Wei Yang <richardw.yang@linux.intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Reviewed-by: David Hildenbrand <david@redhat.com>
Acked-by: Michal Hocko <mhocko@suse.com>
Link: http://lkml.kernel.org/r/20200214003017.25558-2-richardw.yang@linux.intel.com
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
While it might be really clear to MM developers that gfp reclaim modifiers
are applicable only to sleepable allocations (those with
__GFP_DIRECT_RECLAIM) it seems that actual users of the API are not always
sure. Make it explicit that they are not applicable for GFP_NOWAIT or
GFP_ATOMIC allocations which are the most commonly used non-sleepable
allocation masks.
Signed-off-by: Michal Hocko <mhocko@suse.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Reviewed-by: Joel Fernandes (Google) <joel@joelfernandes.org>
Acked-by: Paul E. McKenney <paulmck@kernel.org>
Acked-by: David Rientjes <rientjes@google.com>
Cc: Neil Brown <neilb@suse.de>
Link: http://lkml.kernel.org/r/20200403083543.11552-3-mhocko@kernel.org
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
There is a typo in comment, fix it.
"exeeds" -> "exceeds"
Signed-off-by: Qiujun Huang <hqjagain@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Reviewed-by: Andrew Morton <akpm@linux-foundation.org>
Link: http://lkml.kernel.org/r/20200404060136.10838-1-hqjagain@gmail.com
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
It is unlikely that an inaccessible VMA without required permission flags
will get a page fault. Hence lets just append unlikely() directive to
such checks in order to improve performance while also standardizing it
across various platforms.
Signed-off-by: Anshuman Khandual <anshuman.khandual@arm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Reviewed-by: Andrew Morton <akpm@linux-foundation.org>
Cc: Guo Ren <guoren@kernel.org>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: Paul Burton <paulburton@kernel.org>
Cc: Mike Rapoport <rppt@linux.ibm.com>
Link: http://lkml.kernel.org/r/1582525304-32113-1-git-send-email-anshuman.khandual@arm.com
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Patch series "mm/vma: Use all available wrappers when possible", v2.
Apart from adding a VMA flag readable name for trace purpose, this series
does some open encoding replacements with availabe VMA specific wrappers.
This skips VM_HUGETLB check in vma_migratable() as its already being done
with another patch (https://patchwork.kernel.org/patch/11347831/) which is
yet to be merged.
This patch (of 4):
This just adds the missing readable name for VM_SYNC.
Signed-off-by: Anshuman Khandual <anshuman.khandual@arm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Cc: Vlastimil Babka <vbabka@suse.cz>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Alexander Viro <viro@zeniv.linux.org.uk>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: "Aneesh Kumar K.V" <aneesh.kumar@linux.ibm.com>
Cc: Arnaldo Carvalho de Melo <acme@kernel.org>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Guo Ren <guoren@kernel.org>
Cc: Mel Gorman <mgorman@suse.de>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Nick Piggin <npiggin@gmail.com>
Cc: Paul Burton <paulburton@kernel.org>
Cc: Paul Mackerras <paulus@ozlabs.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: Rich Felker <dalias@libc.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Will Deacon <will@kernel.org>
Cc: Yoshinori Sato <ysato@users.sourceforge.jp>
Link: http://lkml.kernel.org/r/1582520593-30704-2-git-send-email-anshuman.khandual@arm.com
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Set ->vm_next and ->vm_prev to NULL to prevent potential misuse from the
new duplicated vma.
Currently, only in fork path there are misuse for handling anon_vma. No
other bugs been revealed with this patch applied.
Signed-off-by: Li Xinhai <lixinhai.lxh@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Acked-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: Matthew Wilcox <willy@infradead.org>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Rik van Riel <riel@redhat.com>
Link: http://lkml.kernel.org/r/1581150928-3214-4-git-send-email-lixinhai.lxh@gmail.com
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This reverts commit 4e4a9eb921 ("mm/rmap.c: reuse mergeable
anon_vma as parent when fork").
In dup_mmap(), anon_vma_fork() is called for attaching anon_vma and
parameter 'tmp' (i.e., the new vma of child) has same ->vm_next and
->vm_prev as its parent vma. That causes the anon_vma used by parent been
mistakenly shared by child (In anon_vma_clone(), the code added by that
commit will do this reuse work).
Besides this issue, the design of reusing anon_vma from vma which has gone
through fork should be avoided ([1]). So, this patch reverts that commit
and maintains the consistent logic of reusing anon_vma for
fork/split/merge vma.
Reusing anon_vma within the process is fine. But if a vma has gone
through fork(), then that vma's anon_vma should not be shared with its
neighbor vma. As explained in [1], when vma gone through fork(), the
check for list_is_singular(vma->anon_vma_chain) will be false, and
don't share anon_vma.
With current issue, one example can clarify more. Parent process do
below two steps:
1. p_vma_1 is created and p_anon_vma_1 is prepared;
2. p_vma_2 is created and share p_anon_vma_1; (this is allowed,
becaues p_vma_1 didn't gothrough fork()); parent process do fork():
3. c_vma_1 is dup from p_vma_1, and has its own c_anon_vma_1
prepared; at this point, c_vma_1->anon_vma_chain has two items, one
for p_anon_vma_1 and one for c_anon_vma_1;
4. c_vma_2 is dup from p_vma_2, it is not allowed to share
c_anon_vma_1, because
c_vma_1->anon_vma_chain has two items.
[1] commit d0e9fe1758 ("Simplify and comment on anon_vma re-use for
anon_vma_prepare()") explains the test of "list_is_singular()".
Fixes: 4e4a9eb921 ("mm/rmap.c: reuse mergeable anon_vma as parent when fork")
Signed-off-by: Li Xinhai <lixinhai.lxh@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Cc: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: Matthew Wilcox <willy@infradead.org>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Rik van Riel <riel@redhat.com>
Link: http://lkml.kernel.org/r/1581150928-3214-3-git-send-email-lixinhai.lxh@gmail.com
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Patch series "mm: Fix misuse of parent anon_vma in dup_mmap path".
This patchset fixes the misuse of parenet anon_vma, which mainly caused by
child vma's vm_next and vm_prev are left same as its parent after
duplicate vma. Finally, code reached parent vma's neighbor by referring
pointer of child vma and executed wrong logic.
The first two patches fix relevant issues, and the third patch sets
vm_next and vm_prev to NULL when duplicate vma to prevent potential misuse
in future.
Effects of the first bug is that causes rmap code to check both parent and
child's page table, although a page couldn't be mapped by both parent and
child, because child vma has WIPEONFORK so all pages mapped by child are
'new' and not relevant to parent.
Effects of the second bug is that the relationship of anon_vma of parent
and child are totallyconvoluted. It would cause 'son', 'grandson', ...,
etc, to share 'parent' anon_vma, which disobey the design rule of reusing
anon_vma (the rule to be followed is that reusing should among vma of same
process, and vma should not gone through fork).
So, both issues should cause unnecessary rmap walking and have unexpected
complexity.
These two issues would not be directly visible, I used debugging code to
check the anon_vma pointers of parent and child when inspecting the
suspicious implementation of issue #2, then find the problem.
This patch (of 3):
In dup_mmap(), anon_vma_prepare() is called for vma has VM_WIPEONFORK, and
parameter 'tmp' (i.e., the new vma of child) has same ->vm_next and
->vm_prev as its parent vma. That allows anon_vma used by parent been
mistakenly shared by child (find_mergeable_anon_vma() will do this reuse
work).
Besides this issue, call anon_vma_prepare() should be avoided because we
don't copy page for this vma. Preparing anon_vma will be handled during
fault.
Fixes: d2cd9ede6e ("mm,fork: introduce MADV_WIPEONFORK")
Signed-off-by: Li Xinhai <lixinhai.lxh@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Acked-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: Rik van Riel <riel@redhat.com>
Cc: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Link: http://lkml.kernel.org/r/1581150928-3214-2-git-send-email-lixinhai.lxh@gmail.com
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
The root of the hierarchy cannot have high set, so we will never reclaim
based on it. This makes that clearer and avoids another entry.
Signed-off-by: Chris Down <chris@chrisdown.name>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Acked-by: Johannes Weiner <hannes@cmpxchg.org>
Cc: Tejun Heo <tj@kernel.org>
Cc: Roman Gushchin <guro@fb.com>
Cc: Michal Hocko <mhocko@kernel.org>
Link: http://lkml.kernel.org/r/20200312164137.GA1753625@chrisdown.name
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
When CONFIG_DEVFREQ_THERMAL is disabled all functions except
of_devfreq_cooling_register_power() were already inlined. Also inline
the last function to avoid compile errors when multiple drivers call
of_devfreq_cooling_register_power() when CONFIG_DEVFREQ_THERMAL is not
set. Compilation failed with the following message:
multiple definition of `of_devfreq_cooling_register_power'
(which then lists all usages of of_devfreq_cooling_register_power())
Thomas Zimmermann reported this problem [0] on a kernel config with
CONFIG_DRM_LIMA={m,y}, CONFIG_DRM_PANFROST={m,y} and
CONFIG_DEVFREQ_THERMAL=n after both, the lima and panfrost drivers
gained devfreq cooling support.
[0] https://www.spinics.net/lists/dri-devel/msg252825.html
Fixes: a76caf55e5 ("thermal: Add devfreq cooling")
Cc: stable@vger.kernel.org
Reported-by: Thomas Zimmermann <tzimmermann@suse.de>
Signed-off-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Tested-by: Thomas Zimmermann <tzimmermann@suse.de>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Link: https://lore.kernel.org/r/20200403205133.1101808-1-martin.blumenstingl@googlemail.com
Certain boards with GP107/GP108 chipsets hang (often, but randomly) for
unknown reasons during GR initialisation.
The first tell-tale symptom of this issue is:
nouveau 0000:01:00.0: bus: MMIO read of 00000000 FAULT at 409800 [ TIMEOUT ]
appearing in dmesg, likely followed by many other failures being logged.
Karol found this WAR for the issue a while back, but efforts to isolate
the root cause and proper fix have not yielded success so far. I've
modified the original patch to include a few more details, limit it to
GP107/GP108 by default, and added a config option to override this choice.
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
Reviewed-by: Karol Herbst <kherbst@redhat.com>
Fixes the infamous 'runtime PM' bug many users are facing on Laptops with
Nvidia Pascal GPUs by skipping said PCI power state changes on the GPU.
Depending on the used kernel there might be messages like those in demsg:
"nouveau 0000:01:00.0: Refused to change power state, currently in D3"
"nouveau 0000:01:00.0: can't change power state from D3cold to D0 (config
space inaccessible)"
followed by backtraces of kernel crashes or timeouts within nouveau.
It's still unkown why this issue exists, but this is a reliable workaround
and solves a very annoying issue for user having to choose between a
crashing kernel or higher power consumption of their Laptops.
Signed-off-by: Karol Herbst <kherbst@redhat.com>
Cc: Bjorn Helgaas <bhelgaas@google.com>
Cc: Lyude Paul <lyude@redhat.com>
Cc: Rafael J. Wysocki <rjw@rjwysocki.net>
Cc: Mika Westerberg <mika.westerberg@intel.com>
Cc: linux-pci@vger.kernel.org
Cc: linux-pm@vger.kernel.org
Cc: dri-devel@lists.freedesktop.org
Cc: nouveau@lists.freedesktop.org
Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=205623
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
When nouveau processes GPU faults, it checks to see if the fault address
falls within the "unmanaged" range which is reserved for fixed allocations
instead of addresses chosen by the core mm code. If start is greater than
or equal to svmm->unmanaged.limit, then limit will also be greater than
svmm->unmanaged.limit which is greater than svmm->unmanaged.start and the
start = max_t(u64, start, svmm->unmanaged.limit) will change nothing.
Just remove the useless lines of code.
Signed-off-by: Ralph Campbell <rcampbell@nvidia.com>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
When migrating system memory to GPU memory, check that SVM has been
enabled. Even though most errors can be ignored since migration is
a performance optimization, return an error because this is a violation
of the API.
Signed-off-by: Ralph Campbell <rcampbell@nvidia.com>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
find_vma_intersection(mm, start, end) only guarantees that end is greater
than or equal to vma->vm_start but doesn't guarantee that start is
greater than or equal to vma->vm_start. The calculation for the
intersecting range in nouveau_svmm_bind() isn't accounting for this and
can call migrate_vma_setup() with a starting address less than
vma->vm_start. This results in migrate_vma_setup() returning -EINVAL for
the range instead of nouveau skipping that part of the range and migrating
the rest.
Signed-off-by: Ralph Campbell <rcampbell@nvidia.com>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
As there is no need to check for the return value of debugfs_create_file
and drm_debugfs_create_files, remove unnecessary checks and error
handling in nouveau_drm_debugfs_init.
Signed-off-by: Wambui Karuga <wambui.karugax@gmail.com>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
The warning message when a led is renamed due to name collition can fail
to show proper original name if init_data is used. Eg:
[ 9.073996] leds-gpio a0040000.leds_0: Led (null) renamed to red_led_1 due to name collision
Fixes: bb4e9af034 ("leds: core: Add support for composing LED class device names")
Signed-off-by: Ricardo Ribalda Delgado <ribalda@kernel.org>
Acked-by: Jacek Anaszewski <jacek.anaszewski@gmail.com>
Signed-off-by: Pavel Machek <pavel@ucw.cz>
The bitfield 'enabled' should bit unsigned, so make it unsigned.
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Pavel Machek <pavel@ucw.cz>
Instead of the various open coded calls to set the NFS_INO_STALE bit
and call nfs_zap_caches(), consolidate them into a single function
nfs_set_inode_stale().
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
- Update the ACPICA code in the kernel to upstream revision 20200326
including:
* Fix for a typo in a comment field (Bob Moore).
* acpiExec namespace init file fixes (Bob Moore).
* Addition of NHLT to the known tables list (Cezary Rojewski).
* Conversion of PlatformCommChannel ASL keyword to PCC (Erik
Kaneda).
* acpiexec cleanup (Erik Kaneda).
* WSMT-related typo fix (Erik Kaneda).
* sprintf() utility function fix (John Levon).
* IVRS IVHD type 11h parsing implementation (Michał Żygowski).
* IVRS IVHD type 10h reserved field name fix (Michał Żygowski).
- Fix ACPI-related CPU hotplug deadlock on x86 (Qian Cai).
- Fix Intel Tiger Lake ACPI device IDs in several places (Gayatri
Kammela).
- Add ACPI backlight blacklist entry for Acer Aspire 5783z (Hans
de Goede).
- Fix documentation of the "acpi_backlight" kernel command line
switch (Randy Dunlap).
- Clean up the acpi_get_psd_map() CPPC library routine (Liguang
Zhang).
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Merge tag 'acpi-5.7-rc1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
Pull more ACPI updates from Rafael Wysocki:
"Additional ACPI updates.
These update the ACPICA code in the kernel to the 20200326 upstream
revision, fix an ACPI-related CPU hotplug deadlock on x86, update
Intel Tiger Lake device IDs in some places, add a new ACPI backlight
blacklist entry, update the "acpi_backlight" kernel command line
switch documentation and clean up a CPPC library routine.
Specifics:
- Update the ACPICA code in the kernel to upstream revision 20200326
including:
* Fix for a typo in a comment field (Bob Moore)
* acpiExec namespace init file fixes (Bob Moore)
* Addition of NHLT to the known tables list (Cezary Rojewski)
* Conversion of PlatformCommChannel ASL keyword to PCC (Erik
Kaneda)
* acpiexec cleanup (Erik Kaneda)
* WSMT-related typo fix (Erik Kaneda)
* sprintf() utility function fix (John Levon)
* IVRS IVHD type 11h parsing implementation (Michał Żygowski)
* IVRS IVHD type 10h reserved field name fix (Michał Żygowski)
- Fix ACPI-related CPU hotplug deadlock on x86 (Qian Cai)
- Fix Intel Tiger Lake ACPI device IDs in several places (Gayatri
Kammela)
- Add ACPI backlight blacklist entry for Acer Aspire 5783z (Hans de
Goede)
- Fix documentation of the "acpi_backlight" kernel command line
switch (Randy Dunlap)
- Clean up the acpi_get_psd_map() CPPC library routine (Liguang
Zhang)"
* tag 'acpi-5.7-rc1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
x86: ACPI: fix CPU hotplug deadlock
thermal: int340x_thermal: fix: Update Tiger Lake ACPI device IDs
platform/x86: intel-hid: fix: Update Tiger Lake ACPI device ID
ACPI: Update Tiger Lake ACPI device IDs
ACPI: video: Use native backlight on Acer Aspire 5783z
ACPI: video: Docs update for "acpi_backlight" kernel parameter options
ACPICA: Update version 20200326
ACPICA: Fixes for acpiExec namespace init file
ACPICA: Add NHLT table signature
ACPICA: WSMT: Fix typo, no functional change
ACPICA: utilities: fix sprintf()
ACPICA: acpiexec: remove redeclaration of acpi_gbl_db_opt_no_region_support
ACPICA: Change PlatformCommChannel ASL keyword to PCC
ACPICA: Fix IVRS IVHD type 10h reserved field name
ACPICA: Implement IVRS IVHD type 11h parsing
ACPICA: Fix a typo in a comment field
ACPI: CPPC: clean up acpi_get_psd_map()
macsec_upd_offload() gets the value of MACSEC_OFFLOAD_ATTR_TYPE
without checking its presence in the request message, and this causes
a NULL dereference. Fix it rejecting any configuration that does not
include this attribute.
Reported-and-tested-by: syzbot+7022ab7c383875c17eff@syzkaller.appspotmail.com
Fixes: dcb780fb27 ("net: macsec: add nla support for changing the offloading selection")
Signed-off-by: Davide Caratti <dcaratti@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Fixed the punctuation and some typos.
Improved some sentences with minor changes.
No change of semantics or code.
Reviewed-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Reviewed-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Dexuan Cui <decui@microsoft.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
When the bcm_sf2 was converted into a proper platform device driver and
used the new dsa_register_switch() interface, we would still be parsing
the legacy DSA node that contained all the port information since the
platform firmware has intentionally maintained backward and forward
compatibility to client programs. Ensure that we do parse the correct
node, which is "ports" per the revised DSA binding.
Fixes: d9338023fb ("net: dsa: bcm_sf2: Make it a real platform device driver")
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Reviewed-by: Vivien Didelot <vivien.didelot@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
The variable 'rc' is being assigned a value that is never read
and it is being updated later with a new value. The assignment
is redundant and can be removed.
Addresses-Coverity: ("Unused value")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
In function i2400m_bm_buf_alloc there is no need to use a variable
'result' to return -ENOMEM, just return the literal value. In the
function i2400m_setup the variable 'result' is initialized with a
value that is never read, it is a redundant assignment that can
be removed.
Addresses-Coverity: ("Unused value")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
- Fix corner-case suspend-to-idle wakeup issue on systems where
the ACPI SCI is shared with another wakeup source (Hans de Goede).
- Add document describing system-wide suspend and resume code flows
to the admin guide (Rafael Wysocki).
- Add kernel command line option to set pm_debug_messages (Chen Yu).
- Choose schedutil as the preferred scaling governor by default on
ARM big.LITTLE systems and on x86 systems using the intel_pstate
driver in the passive mode (Linus Walleij, Rafael Wysocki).
- Drop racy and redundant checks from the PM core's device_prepare()
routine (Rafael Wysocki).
- Make resume from hibernation take the hibernation_restore() return
value into account (Dexuan Cui).
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Merge tag 'pm-5.7-rc1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
Pull more power management updates from Rafael Wysocki:
"Additional power management updates.
These fix a corner-case suspend-to-idle wakeup issue on systems where
the ACPI SCI is shared with another wakeup source, add a kernel
command line option to set pm_debug_messages via the kernel command
line, add a document desctibing system-wide suspend and resume code
flows, modify cpufreq Kconfig to choose schedutil as the preferred
governor by default in a couple of cases and do some assorted
cleanups.
Specifics:
- Fix corner-case suspend-to-idle wakeup issue on systems where the
ACPI SCI is shared with another wakeup source (Hans de Goede).
- Add document describing system-wide suspend and resume code flows
to the admin guide (Rafael Wysocki).
- Add kernel command line option to set pm_debug_messages (Chen Yu).
- Choose schedutil as the preferred scaling governor by default on
ARM big.LITTLE systems and on x86 systems using the intel_pstate
driver in the passive mode (Linus Walleij, Rafael Wysocki).
- Drop racy and redundant checks from the PM core's device_prepare()
routine (Rafael Wysocki).
- Make resume from hibernation take the hibernation_restore() return
value into account (Dexuan Cui)"
* tag 'pm-5.7-rc1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
platform/x86: intel_int0002_vgpio: Use acpi_register_wakeup_handler()
ACPI: PM: Add acpi_[un]register_wakeup_handler()
Documentation: PM: sleep: Document system-wide suspend code flows
cpufreq: Select schedutil when using big.LITTLE
PM: sleep: Add pm_debug_messages kernel command line option
PM: sleep: core: Drop racy and redundant checks from device_prepare()
PM: hibernate: Propagate the return value of hibernation_restore()
cpufreq: intel_pstate: Select schedutil as the default governor
Ido Schimmel says:
====================
mlxsw: spectrum_flower: Do not stop at FLOW_ACTION_{VLAN_MANGLE, PRIORITY}
Petr says:
The handlers for FLOW_ACTION_VLAN_MANGLE and FLOW_ACTION_PRIORITY end by
returning whatever the lower-level function that they call returns. If
there are more actions lined up after one of these actions, those are
never offloaded. Each of the two patches fixes one of those actions.
v2:
* Patch #1: Use valid SHA1 ID in Fixes line (Dave)
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
The handler for FLOW_ACTION_VLAN_MANGLE ends by returning whatever the
lower-level function that it calls returns. If there are more actions lined
up after this action, those are never offloaded. Fix by only bailing out
when the called function returns an error.
Fixes: a150201a70 ("mlxsw: spectrum: Add support for vlan modify TC action")
Signed-off-by: Petr Machata <petrm@mellanox.com>
Reviewed-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
The handler for FLOW_ACTION_PRIORITY ends by returning whatever the
lower-level function that it calls returns. If there are more actions lined
up after this action, those are never offloaded. Fix by only bailing out
when the called function returns an error.
Fixes: 463957e3fb ("mlxsw: spectrum_flower: Offload FLOW_ACTION_PRIORITY")
Signed-off-by: Petr Machata <petrm@mellanox.com>
Reviewed-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
There has been a number of reports that using SG/TSO on different chip
versions results in tx timeouts. However for a lot of people SG/TSO
works fine. Therefore disable both features by default, but allow users
to enable them. Use at own risk!
Fixes: 93681cd7d9 ("r8169: enable HW csum and TSO")
Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
We were registering our slave MDIO bus with OF and doing so with
assigning the newly created slave_mii_bus of_node to the master MDIO bus
controller node. This is a bad thing to do for a number of reasons:
- we are completely lying about the slave MII bus is arranged and yet we
still want to control which MDIO devices it probes. It was attempted
before to play tricks with the bus_mask to perform that:
https://www.spinics.net/lists/netdev/msg429420.html but the approach
was rightfully rejected
- the device_node reference counting is messed up and we are effectively
doing a double probe on the devices we already probed using the
master, this messes up all resources reference counts (such as clocks)
The proper fix for this as indicated by David in his reply to the
thread above is to use a platform data style registration so as to
control exactly which devices we probe:
https://www.spinics.net/lists/netdev/msg430083.html
By using mdiobus_register(), our slave_mii_bus->phy_mask value is used
as intended, and all the PHY addresses that must be redirected towards
our slave MDIO bus is happening while other addresses get redirected
towards the master MDIO bus.
Fixes: 461cd1b03e ("net: dsa: bcm_sf2: Register our slave MDIO bus")
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Reviewed-by: Vivien Didelot <vivien.didelot@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This patch fix the loop iteration by not walking over the last
iteration. The cmpri compressing value exempt the last segment. As the
code shows the last iteration will be overwritten by cmpre value
handling which is for the last segment.
I think this doesn't end in any bufferoverflows because we work on worst
case temporary buffer sizes but it ends in not best compression settings
in some cases.
Fixes: 8610c7c6e3 ("net: ipv6: add support for rpl sr exthdr")
Signed-off-by: Alexander Aring <alex.aring@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
When an XDP program is installed, tun_build_skb() grabs a reference to
the current page fragment page if the program returns XDP_REDIRECT or
XDP_TX. However, since tun_xdp_act() passes through negative return
values from the XDP program, it is possible to trigger the error path by
mistake and accidentally drop a reference to the fragments page without
taking one, leading to a spurious free. This is believed to be the cause
of some KASAN use-after-free reports from syzbot [1], although without a
reproducer it is not possible to confirm whether this patch fixes the
problem.
Ensure that we only drop a reference to the fragments page if the XDP
transmit or redirect operations actually fail.
[1] https://syzkaller.appspot.com/bug?id=e76a6af1be4acd727ff6bbca669833f98cbf5d95
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Alexei Starovoitov <ast@kernel.org>
Cc: Daniel Borkmann <daniel@iogearbox.net>
CC: Eric Dumazet <edumazet@google.com>
Acked-by: Jason Wang <jasowang@redhat.com>
Fixes: 8ae1aff0b3 ("tuntap: split out XDP logic")
Signed-off-by: Will Deacon <will@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
- Add kproobes/uprobes support
- Add lockdep, rseq, gcov support
- Fixup init_fpu
- Fixup ftrace_modify deadlock
- Fixup speculative execution on IO area
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Merge tag 'csky-for-linus-5.7-rc1' of git://github.com/c-sky/csky-linux
Pull csky updates from Guo Ren:
- Add kproobes/uprobes support
- Add lockdep, rseq, gcov support
- Fixup init_fpu
- Fixup ftrace_modify deadlock
- Fixup speculative execution on IO area
* tag 'csky-for-linus-5.7-rc1' of git://github.com/c-sky/csky-linux:
csky: Fixup cpu speculative execution to IO area
csky: Add uprobes support
csky: Add kprobes supported
csky: Enable LOCKDEP_SUPPORT
csky: Enable the gcov function
csky: Fixup get wrong psr value from phyical reg
csky/ftrace: Fixup ftrace_modify_code deadlock without CPU_HAS_ICACHE_INS
csky: Implement ftrace with regs
csky: Add support for restartable sequence
csky: Implement ptrace regs and stack API
csky: Fixup init_fpu compile warning with __init
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Merge tag 'fsnotify_for_v5.7-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs
Pull fsnotify updates from Jan Kara:
"This implements the fanotify FAN_DIR_MODIFY event.
This event reports the name in a directory under which a change
happened and together with the directory filehandle and fstatat()
allows reliable and efficient implementation of directory
synchronization"
* tag 'fsnotify_for_v5.7-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs:
fanotify: Fix the checks in fanotify_fsid_equal
fanotify: report name info for FAN_DIR_MODIFY event
fanotify: record name info for FAN_DIR_MODIFY event
fanotify: Drop fanotify_event_has_fid()
fanotify: prepare to report both parent and child fid's
fanotify: send FAN_DIR_MODIFY event flavor with dir inode and name
fanotify: divorce fanotify_path_event and fanotify_fid_event
fanotify: Store fanotify handles differently
fanotify: Simplify create_fd()
fanotify: fix merging marks masks with FAN_ONDIR
fanotify: merge duplicate events on parent and child
fsnotify: replace inode pointer with an object id
fsnotify: simplify arguments passing to fsnotify_parent()
fsnotify: use helpers to access data by data_type
fsnotify: funnel all dirent events through fsnotify_name()
fsnotify: factor helpers fsnotify_dentry() and fsnotify_file()
fsnotify: tidy up FS_ and FAN_ constants
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Merge tag 'for_v5.7-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs
Pull ext2/udf updates from Jan Kara:
"Cleanups and fixes for ext2 and one cleanup for udf"
* tag 'for_v5.7-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs:
ext2: fix empty body warnings when -Wextra is used
ext2: fix debug reference to ext2_xattr_cache
udf: udf_sb.h: Replace zero-length array with flexible-array member
ext2: xattr.h: Replace zero-length array with flexible-array member
ext2: Silence lockdep warning about reclaim under xattr_sem
- Fix read with O_NONBLOCK to allow incomplete read and return immediately
- Rest is just cleanup (indent, unused field in struct, extra semicolon)
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Merge tag '9p-for-5.7' of git://github.com/martinetd/linux
Pull 9p updates from Dominique Martinet:
"Not much new, but a few patches for this cycle:
- Fix read with O_NONBLOCK to allow incomplete read and return
immediately
- Rest is just cleanup (indent, unused field in struct, extra
semicolon)"
* tag '9p-for-5.7' of git://github.com/martinetd/linux:
net/9p: remove unused p9_req_t aux field
9p: read only once on O_NONBLOCK
9pnet: allow making incomplete read requests
9p: Remove unneeded semicolon
9p: Fix Kconfig indentation
