Vaishali Thakkar 9fee021d15 mm/hugetlb: introduce hugetlb_bad_size() ... When any unsupported hugepage size is specified, 'hugepagesz=' and 'hugepages=' should be ignored during command line parsing until any supported hugepage size is found. But currently incorrect number of hugepages are allocated when unsupported size is specified as it fails to ignore the 'hugepages=' command. Test case: Note that this is specific to x86 architecture. Boot the kernel with command line option 'hugepagesz=256M hugepages=X'. After boot, dmesg output shows that X number of hugepages of the size 2M is pre-allocated instead of 0. So, to handle such command line options, introduce new routine hugetlb_bad_size. The routine hugetlb_bad_size sets the global variable parsed_valid_hugepagesz. We are using parsed_valid_hugepagesz to save the state when unsupported hugepagesize is found so that we can ignore the 'hugepages=' parameters after that and then reset the variable when supported hugepage size is found. The routine hugetlb_bad_size can be called while setting 'hugepagesz=' parameter in an architecture specific code. Signed-off-by: Vaishali Thakkar <vaishali.thakkar@oracle.com> Reviewed-by: Mike Kravetz <mike.kravetz@oracle.com> Reviewed-by: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com> Acked-by: Michal Hocko <mhocko@suse.com> Cc: Hillf Danton <hillf.zj@alibaba-inc.com> Cc: Yaowei Bai <baiyaowei@cmss.chinamobile.com> Cc: Dominik Dingel <dingel@linux.vnet.ibm.com> Cc: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Cc: Paul Gortmaker <paul.gortmaker@windriver.com> Cc: Dave Hansen <dave.hansen@linux.intel.com> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: James Hogan <james.hogan@imgtec.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: "H. Peter Anvin" <hpa@zytor.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>		2016-05-19 19:12:14 -07:00
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acpi
asm-generic	Merge branch 'x86-asm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2016-05-16 15:15:17 -07:00
clocksource
crypto
drm
dt-bindings	ARM: SoC driver updates for v4.7	2016-05-18 13:14:02 -07:00
keys
kvm
linux	mm/hugetlb: introduce hugetlb_bad_size()	2016-05-19 19:12:14 -07:00
math-emu
media
memory
misc
net	switchdev: pass pointer to fib_info instead of copy	2016-05-17 13:58:49 -04:00
pcmcia
ras
rdma
rxrpc
scsi
soc	ARM: SoC driver updates for v4.7	2016-05-18 13:14:02 -07:00
sound
target
trace	SCSI misc on 20160517	2016-05-18 16:38:59 -07:00
uapi	media updates for v4.7-rc1	2016-05-18 17:03:51 -07:00
video
xen
Kbuild