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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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4
kernel/kexec.c
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@ -32,6 +32,7 @@
#include <linux/console.h>
#include <linux/vmalloc.h>
#include <linux/swap.h>
#include <linux/kmsg_dump.h>
#include <asm/page.h>
#include <asm/uaccess.h>
@ -1074,6 +1075,9 @@ void crash_kexec(struct pt_regs *regs)
if (mutex_trylock(&kexec_mutex)) {
if (kexec_crash_image) {
struct pt_regs fixed_regs;
kmsg_dump(KMSG_DUMP_KEXEC);
crash_setup_regs(&fixed_regs, regs);
crash_save_vmcoreinfo();
machine_crash_shutdown(&fixed_regs);