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kmsg_dump: Dump on crash_kexec as well

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crash_kexec gets called before kmsg_dump(KMSG_DUMP_OOPS) if
panic_on_oops is set, so the kernel log buffer is not stored
for this case.

This patch adds a KMSG_DUMP_KEXEC dump type which gets called
when crash_kexec() is invoked. To avoid getting double dumps,
the old KMSG_DUMP_PANIC is moved below crash_kexec(). The
mtdoops driver is modified to handle KMSG_DUMP_KEXEC in the
same way as a panic.

Signed-off-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Acked-by: Simon Kagstrom <simon.kagstrom@netinsight.net>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
This commit is contained in:
KOSAKI Motohiro 2009-12-22 03:15:43 +00:00 • committed by David Woodhouse
parent 60d9aa758c
commit 0f4bd46ec2
5 changed files with 9 additions and 2 deletions
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3
kernel/panic.c
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@ -75,7 +75,6 @@ NORET_TYPE void panic(const char * fmt, ...)
dump_stack();
#endif
kmsg_dump(KMSG_DUMP_PANIC);
/*
* If we have crashed and we have a crash kernel loaded let it handle
* everything else.
@ -83,6 +82,8 @@ NORET_TYPE void panic(const char * fmt, ...)
*/
crash_kexec(NULL);
kmsg_dump(KMSG_DUMP_PANIC);
/*
* Note smp_send_stop is the usual smp shutdown function, which
* unfortunately means it may not be hardened to work in a panic