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Red Hat Bugzilla – Attachment 305138 Details for
Bug 445450
[RHEL4]: Kernel crash when booting -68.33 or later under KVM on AMD systems
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[patch]
test patch
check_if_perfctr_is_usable_on_reserve.patch (text/plain), 604 bytes, created by
Aristeu Rozanski
on 2008-05-12 15:43:37 UTC
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Description:
test patch
Filename:
MIME Type:
Creator:
Aristeu Rozanski
Created:
2008-05-12 15:43:37 UTC
Size:
604 bytes
patch
obsolete
>--- > arch/x86_64/kernel/perfctr-watchdog.c | 5 +++++ > 1 file changed, 5 insertions(+) > >--- tree.orig/arch/x86_64/kernel/perfctr-watchdog.c 2008-05-06 16:42:42.000000000 -0400 >+++ tree/arch/x86_64/kernel/perfctr-watchdog.c 2008-05-06 17:08:22.000000000 -0400 >@@ -121,6 +121,11 @@ int reserve_perfctr_nmi(unsigned int msr > unsigned int counter; > > counter = nmi_perfctr_msr_to_bit(msr); >+ >+ /* check if the register can be used (KVM and other cases) */ >+ if (checking_wrmsrl(msr, 0) < 0) >+ return 1; >+ > /* register not managed by the allocator? */ > if (counter > NMI_MAX_COUNTER_BITS) > return 1;
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