diff options
| author | Andy Lutomirski <luto@amacapital.net> | 2014-12-21 19:18:25 +0300 |
|---|---|---|
| committer | Borislav Petkov <bp@suse.de> | 2014-12-22 19:47:45 +0300 |
| commit | 6c80f87ed4483bff0ecbf4455a1b09e7f950e9ab (patch) | |
| tree | dde17d59940c22fd139e090a4e2288595a504464 /arch/x86 | |
| parent | 97bf6af1f928216fd6c5a66e8a57bfa95a659672 (diff) | |
| download | linux-6c80f87ed4483bff0ecbf4455a1b09e7f950e9ab.tar.xz | |
x86, mce: Improve timeout error messages
There are four different possible types of timeouts. Distinguish
them in the logs to help debug them.
Signed-off-by: Andy Lutomirski <luto@amacapital.net>
Link: http://lkml.kernel.org/r/0fa6d2653a54a01c48b43a3583caf950ea99606e.1419178397.git.luto@amacapital.net
Signed-off-by: Borislav Petkov <bp@suse.de>
Diffstat (limited to 'arch/x86')
| -rw-r--r-- | arch/x86/kernel/cpu/mcheck/mce.c | 19 |
1 files changed, 11 insertions, 8 deletions
diff --git a/arch/x86/kernel/cpu/mcheck/mce.c b/arch/x86/kernel/cpu/mcheck/mce.c index d2c611699cd9..323e02c658af 100644 --- a/arch/x86/kernel/cpu/mcheck/mce.c +++ b/arch/x86/kernel/cpu/mcheck/mce.c @@ -311,7 +311,7 @@ static void wait_for_panic(void) panic("Panicing machine check CPU died"); } -static void mce_panic(char *msg, struct mce *final, char *exp) +static void mce_panic(const char *msg, struct mce *final, char *exp) { int i, apei_err = 0; @@ -735,7 +735,7 @@ static atomic_t mce_callin; /* * Check if a timeout waiting for other CPUs happened. */ -static int mce_timed_out(u64 *t) +static int mce_timed_out(u64 *t, const char *msg) { /* * The others already did panic for some reason. @@ -750,8 +750,7 @@ static int mce_timed_out(u64 *t) goto out; if ((s64)*t < SPINUNIT) { if (mca_cfg.tolerant <= 1) - mce_panic("Timeout synchronizing machine check over CPUs", - NULL, NULL); + mce_panic(msg, NULL, NULL); cpu_missing = 1; return 1; } @@ -867,7 +866,8 @@ static int mce_start(int *no_way_out) * Wait for everyone. */ while (atomic_read(&mce_callin) != cpus) { - if (mce_timed_out(&timeout)) { + if (mce_timed_out(&timeout, + "Timeout: Not all CPUs entered broadcast exception handler")) { atomic_set(&global_nwo, 0); return -1; } @@ -892,7 +892,8 @@ static int mce_start(int *no_way_out) * only seen by one CPU before cleared, avoiding duplicates. */ while (atomic_read(&mce_executing) < order) { - if (mce_timed_out(&timeout)) { + if (mce_timed_out(&timeout, + "Timeout: Subject CPUs unable to finish machine check processing")) { atomic_set(&global_nwo, 0); return -1; } @@ -936,7 +937,8 @@ static int mce_end(int order) * loops. */ while (atomic_read(&mce_executing) <= cpus) { - if (mce_timed_out(&timeout)) + if (mce_timed_out(&timeout, + "Timeout: Monarch CPU unable to finish machine check processing")) goto reset; ndelay(SPINUNIT); } @@ -949,7 +951,8 @@ static int mce_end(int order) * Subject: Wait for Monarch to finish. */ while (atomic_read(&mce_executing) != 0) { - if (mce_timed_out(&timeout)) + if (mce_timed_out(&timeout, + "Timeout: Monarch CPU did not finish machine check processing")) goto reset; ndelay(SPINUNIT); } |