diff options
| author | Linus Torvalds <torvalds@linux-foundation.org> | 2017-04-03 08:36:24 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2017-04-03 08:36:24 -0700 |
| commit | 3ccfcdc9efe861983d26d56f1f0ecae3f61a3a09 (patch) | |
| tree | 2dfa18f657e3e84a34f74f36aa0489eac7c8cda9 /arch | |
| parent | a71c9a1c779f2499fb2afc0553e543f18aff6edf (diff) | |
| parent | cc66afea58f858ff6da7f79b8a595a67bbb4f9a9 (diff) | |
Merge branch 'ras-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull RAS fix from Thomas Gleixner:
"Prevent dmesg from being spammed when MCE logging is active"
* 'ras-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86/mce: Don't print MCEs when mcelog is active
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/x86/kernel/cpu/mcheck/mce.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/arch/x86/kernel/cpu/mcheck/mce.c b/arch/x86/kernel/cpu/mcheck/mce.c index 8e9725c607ea..5accfbdee3f0 100644 --- a/arch/x86/kernel/cpu/mcheck/mce.c +++ b/arch/x86/kernel/cpu/mcheck/mce.c @@ -54,6 +54,8 @@ static DEFINE_MUTEX(mce_chrdev_read_mutex); +static int mce_chrdev_open_count; /* #times opened */ + #define mce_log_get_idx_check(p) \ ({ \ RCU_LOCKDEP_WARN(!rcu_read_lock_sched_held() && \ @@ -598,6 +600,10 @@ static int mce_default_notifier(struct notifier_block *nb, unsigned long val, if (atomic_read(&num_notifiers) > 2) return NOTIFY_DONE; + /* Don't print when mcelog is running */ + if (mce_chrdev_open_count > 0) + return NOTIFY_DONE; + __print_mce(m); return NOTIFY_DONE; @@ -1828,7 +1834,6 @@ void mcheck_cpu_clear(struct cpuinfo_x86 *c) */ static DEFINE_SPINLOCK(mce_chrdev_state_lock); -static int mce_chrdev_open_count; /* #times opened */ static int mce_chrdev_open_exclu; /* already open exclusive? */ static int mce_chrdev_open(struct inode *inode, struct file *file) |