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| author | Xunlei Pang <xlpang@redhat.com> | 2017-03-13 10:50:19 +0100 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2017-03-13 20:18:07 +0100 |
| commit | 5bc329503e8191c91c4c40836f062ef771d8ba83 (patch) | |
| tree | 929ecf39268564f1da21b3846fa588a27c152f91 /arch/x86/include/asm/reboot.h | |
| parent | 4495c08e84729385774601b5146d51d9e5849f81 (diff) | |
| download | linux-0-day-5bc329503e8191c91c4c40836f062ef771d8ba83.tar.gz linux-0-day-5bc329503e8191c91c4c40836f062ef771d8ba83.tar.xz | |
x86/mce: Handle broadcasted MCE gracefully with kexec
When we are about to kexec a crash kernel and right then and there a
broadcasted MCE fires while we're still in the first kernel and while
the other CPUs remain in a holding pattern, the #MC handler of the
first kernel will timeout and then panic due to never completing MCE
synchronization.
Handle this in a similar way as to when the CPUs are offlined when that
broadcasted MCE happens.
[ Boris: rewrote commit message and comments. ]
Suggested-by: Borislav Petkov <bp@alien8.de>
Signed-off-by: Xunlei Pang <xlpang@redhat.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Acked-by: Tony Luck <tony.luck@intel.com>
Cc: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
Cc: kexec@lists.infradead.org
Cc: linux-edac <linux-edac@vger.kernel.org>
Link: http://lkml.kernel.org/r/1487857012-9059-1-git-send-email-xlpang@redhat.com
Link: http://lkml.kernel.org/r/20170313095019.19351-1-bp@alien8.de
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'arch/x86/include/asm/reboot.h')
| -rw-r--r-- | arch/x86/include/asm/reboot.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/x86/include/asm/reboot.h b/arch/x86/include/asm/reboot.h index 2cb1cc253d51e..fc62ba8dce933 100644 --- a/arch/x86/include/asm/reboot.h +++ b/arch/x86/include/asm/reboot.h @@ -15,6 +15,7 @@ struct machine_ops { }; extern struct machine_ops machine_ops; +extern int crashing_cpu; void native_machine_crash_shutdown(struct pt_regs *regs); void native_machine_shutdown(void); |