Messages in this thread Patch in this message | | | Date | Sat, 8 Jan 2005 21:29:41 -0700 (MST) | From | Zwane Mwaikambo <> | Subject | [PATCH] x86_64: Notify user of MCE events. |
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x86_64 uses a userspace mce utility to decode MCEs, this patch will ensure that the user is notified of MCE events being logged too.
Signed-off-by: Zwane Mwaikambo <zwane@arm.linux.org.uk>
Index: linux-2.6.10-mm1/arch/x86_64/kernel/mce.c =================================================================== RCS file: /home/cvsroot/linux-2.6.10-mm1/arch/x86_64/kernel/mce.c,v retrieving revision 1.1.1.1 diff -u -p -B -r1.1.1.1 mce.c --- linux-2.6.10-mm1/arch/x86_64/kernel/mce.c 4 Jan 2005 04:03:35 -0000 1.1.1.1 +++ linux-2.6.10-mm1/arch/x86_64/kernel/mce.c 9 Jan 2005 03:15:48 -0000 @@ -31,6 +32,8 @@ static int mce_dont_init; static int tolerant = 1; static int banks; static unsigned long bank[NR_BANKS] = { [0 ... NR_BANKS-1] = ~0UL }; +static unsigned long console_logged; +static int notify_user; /* * Lockless MCE logging infrastructure. @@ -68,6 +71,9 @@ void mce_log(struct mce *mce) smp_wmb(); mcelog.entry[entry].finished = 1; smp_wmb(); + + if (!test_and_set_bit(0, &console_logged)) + notify_user = 1; } static void print_mce(struct mce *m) @@ -252,6 +258,12 @@ static void mcheck_timer(void *data) { on_each_cpu(mcheck_check_cpu, NULL, 1, 1); schedule_delayed_work(&mcheck_work, check_interval * HZ); + + if (notify_user && console_logged) { + notify_user = 0; + clear_bit(0, &console_logged); + printk(KERN_EMERG "Machine check exception logged, run mcelog\n"); + } }
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