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| author | Chen, Gong <gong.chen@linux.intel.com> | 2015-08-12 18:29:37 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2015-08-13 10:12:51 +0200 |
| commit | f29a7aff4bd60ebc3da4982f80144a4158c4c74a (patch) | |
| tree | 1403d279016fbaba44d00cb98e038b439fc50d65 /arch/x86/kernel/cpu/mcheck/mce_intel.c | |
| parent | fd4cf79fcc4b5130ced8fd8c40378d3cec2e5fa8 (diff) | |
| download | linux-f29a7aff4bd60ebc3da4982f80144a4158c4c74a.tar.gz linux-f29a7aff4bd60ebc3da4982f80144a4158c4c74a.tar.bz2 linux-f29a7aff4bd60ebc3da4982f80144a4158c4c74a.zip | |
x86/mce: Avoid potential deadlock due to printk() in MCE context
Printing in MCE context is a no-no, currently, as printk() is
not NMI-safe. If some of the notifiers on the MCE chain call do
so, we may deadlock. In order to avoid that, delay printk() to
process context where it is safe.
Reported-by: Xie XiuQi <xiexiuqi@huawei.com>
Signed-off-by: Chen, Gong <gong.chen@linux.intel.com>
[ Fold in subsequent patch from Boris for early boot logging. ]
Signed-off-by: Tony Luck <tony.luck@intel.com>
[ Kick irq_work in mce_log() directly. ]
Signed-off-by: Borislav Petkov <bp@suse.de>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/1439396985-12812-6-git-send-email-bp@alien8.de
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'arch/x86/kernel/cpu/mcheck/mce_intel.c')
| -rw-r--r-- | arch/x86/kernel/cpu/mcheck/mce_intel.c | 1 |
1 files changed, 0 insertions, 1 deletions
diff --git a/arch/x86/kernel/cpu/mcheck/mce_intel.c b/arch/x86/kernel/cpu/mcheck/mce_intel.c index 844f56c5616d..70f567f774ed 100644 --- a/arch/x86/kernel/cpu/mcheck/mce_intel.c +++ b/arch/x86/kernel/cpu/mcheck/mce_intel.c @@ -246,7 +246,6 @@ static void intel_threshold_interrupt(void) return; machine_check_poll(MCP_TIMESTAMP, this_cpu_ptr(&mce_banks_owned)); - mce_notify_irq(); } /* |