Messages in this thread Patch in this message | | | Date | Mon, 3 Apr 2017 11:45:21 +0200 (CEST) | From | Thomas Gleixner <> | Subject | [GIT pull] ras fix for 4.11 |
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Linus,
please pull the latest ras-urgent-for-linus git tree from:
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git ras-urgent-for-linus
Prevent dmesg from being spammed when MCE logging is active.
Thanks,
tglx
------------------> Andi Kleen (1): x86/mce: Don't print MCEs when mcelog is active
arch/x86/kernel/cpu/mcheck/mce.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-)
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)
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