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| author |   Mahesh Salgaonkar <mahesh@linux.vnet.ibm.com> | 2012-02-16 01:15:08 +0000 |
|---|---|---|
| committer |   Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2012-02-23 10:50:02 +1100 |
| commit | b500afff11f64227ca69fd2d05986d08d9573935 (patch) | |
| tree | 611abfdfca1a12225f4ffbac7661a80bba3c46a4 /arch/powerpc/include/asm | |
| parent | fadump: Introduce cleanup routine to invalidate /proc/vmcore. (diff) | |
| download | linux-dev-b500afff11f64227ca69fd2d05986d08d9573935.tar.xz linux-dev-b500afff11f64227ca69fd2d05986d08d9573935.zip | |
fadump: Invalidate registration and release reserved memory for general use.
This patch introduces an sysfs interface '/sys/kernel/fadump_release_mem' to
invalidate the last fadump registration, invalidate '/proc/vmcore', release
the reserved memory for general use and re-register for future kernel dump.
Once the dump is copied to the disk, unlike phyp dump, the userspace tool
can release all the memory reserved for dump with one single operation of
echo 1 to '/sys/kernel/fadump_release_mem'.
Release the reserved memory region excluding the size of the memory required
for future kernel dump registration. And therefore, unlike kdump, Fadump
doesn't need a 2nd reboot to get back the system to the production
configuration.
Signed-off-by: Mahesh Salgaonkar <mahesh@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Diffstat (limited to 'arch/powerpc/include/asm')
| -rw-r--r-- | arch/powerpc/include/asm/fadump.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/arch/powerpc/include/asm/fadump.h b/arch/powerpc/include/asm/fadump.h index 67681958e4b8..88dbf9659185 100644 --- a/arch/powerpc/include/asm/fadump.h +++ b/arch/powerpc/include/asm/fadump.h @@ -208,6 +208,9 @@ extern int fadump_reserve_mem(void); extern int setup_fadump(void); extern int is_fadump_active(void); extern void crash_fadump(struct pt_regs *, const char *); +extern void fadump_cleanup(void); + +extern void vmcore_cleanup(void); #else /* CONFIG_FA_DUMP */ static inline int is_fadump_active(void) { return 0; } static inline void crash_fadump(struct pt_regs *regs, const char *str) { } |