kernel_optimize_test/arch/s390
Christian Borntraeger 83987ace22 s390/kvm: Fix BUG in include/linux/kvm_host.h:745
commit b080935c86
    kvm: Directly account vtime to system on guest switch

also removed the irq_disable/enable around kvm guest switch, which
is correct in itself. Unfortunately, there is a BUG ON that (correctly)
checks for preemptible to cover the call to rcu later on.
(Introduced with commit 8fa2206821
    KVM: make guest mode entry to be rcu quiescent state)

This check might trigger depending on the kernel config.
Lets make sure that no preemption happens during kvm_guest_enter.
We can enable preemption again after the call to
rcu_virt_note_context_switch returns.

Please note that we continue to run s390 guests with interrupts
enabled.

Acked-by: Frederic Weisbecker <fweisbec@gmail.com>
CC: Gleb Natapov <gleb@redhat.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2013-01-10 17:53:40 -02:00
..
appldata s390/vtimer: rework virtual timer interface 2012-07-20 11:15:08 +02:00
boot s390: fix linker script for 31 bit builds 2012-10-18 17:50:10 +02:00
crypto s390/crypto: Don't panic after crypto instruction failures 2012-11-23 11:14:27 +01:00
hypfs Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2012-10-02 20:25:04 -07:00
include s390/pci: define read*_relaxed functions 2013-01-08 10:57:11 +01:00
kernel s390/topology: export cpu_topology 2013-01-08 10:57:10 +01:00
kvm s390/kvm: Fix BUG in include/linux/kvm_host.h:745 2013-01-10 17:53:40 -02:00
lib s390/mm: use pmd_large() instead of pmd_huge() 2012-10-26 16:44:23 +02:00
math-emu s390/comments: unify copyright messages and remove file names 2012-07-20 11:15:04 +02:00
mm s390/irq: remove split irq fields from /proc/stat 2013-01-08 10:57:07 +01:00
net s390/bpf,jit: add support for XOR instruction 2012-12-03 10:44:05 -05:00
oprofile s390/irq: remove split irq fields from /proc/stat 2013-01-08 10:57:07 +01:00
pci s390/irq: remove split irq fields from /proc/stat 2013-01-08 10:57:07 +01:00
defconfig s390: update defconfig 2012-09-26 15:45:29 +02:00
Kbuild s390/pci: base support 2012-11-30 15:40:45 +01:00
Kconfig Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/signal 2012-12-20 18:05:28 -08:00
Kconfig.debug s390/mm: add page table dumper 2012-10-09 14:16:58 +02:00
Makefile s390: add zEC12 code generation support 2012-11-23 11:14:31 +01:00