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| author | Gavin Shan <gwshan@linux.vnet.ibm.com> | 2014-11-22 21:58:09 +1100 |
|---|---|---|
| committer | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2014-12-02 11:03:26 +1100 |
| commit | a450e8f55a57d049ac3afe218f06567e12d6b4f5 (patch) | |
| tree | 5d3dbf3db60f86f9cb737bf9cbd41d507720b9a8 /arch/powerpc/kernel/eeh.c | |
| parent | b1d76a7d57762332cd8e0c020470d43c5ad3948e (diff) | |
| download | blackbird-op-linux-a450e8f55a57d049ac3afe218f06567e12d6b4f5.tar.gz blackbird-op-linux-a450e8f55a57d049ac3afe218f06567e12d6b4f5.zip | |
powerpc/eeh: Dump PHB diag-data early
On PowerNV platform, PHB diag-data is dumped after stopping device
drivers. In case of recursive EEH errors, the kernel is usually
crashed before dumping PHB diag-data for the second EEH error. It's
hard to locate the root cause of the second EEH error without PHB
diag-data.
The patch adds one more EEH option "eeh=early_log", which helps
dumping PHB diag-data immediately once frozen PE is detected, in
order to get the PHB diag-data for the second EEH error.
Signed-off-by: Gavin Shan <gwshan@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Diffstat (limited to 'arch/powerpc/kernel/eeh.c')
| -rw-r--r-- | arch/powerpc/kernel/eeh.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/powerpc/kernel/eeh.c b/arch/powerpc/kernel/eeh.c index f1c6b115cb37..05be77d9ea0e 100644 --- a/arch/powerpc/kernel/eeh.c +++ b/arch/powerpc/kernel/eeh.c @@ -143,6 +143,8 @@ static int __init eeh_setup(char *str) { if (!strcmp(str, "off")) eeh_add_flag(EEH_FORCE_DISABLED); + else if (!strcmp(str, "early_log")) + eeh_add_flag(EEH_EARLY_DUMP_LOG); return 1; } |
