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authorVivek Goyal <vgoyal@in.ibm.com>2006-01-09 23:51:41 -0500
committerLinus Torvalds <torvalds@g5.osdl.org>2006-01-10 11:01:26 -0500
commitcc57165874e938ef684d71ba7d36e7088b551489 (patch)
treee1847f5547a7a426214e9ef0719eab908ee305d7 /include/asm-s390
parent82409411571ad89d271dc46f7fa26149fad9efdf (diff)
[PATCH] kdump: dynamic per cpu allocation of memory for saving cpu registers
- In case of system crash, current state of cpu registers is saved in memory in elf note format. So far memory for storing elf notes was being allocated statically for NR_CPUS. - This patch introduces dynamic allocation of memory for storing elf notes. It uses alloc_percpu() interface. This should lead to better memory usage. - Introduced based on Andi Kleen's and Eric W. Biederman's suggestions. - This patch also moves memory allocation for elf notes from architecture dependent portion to architecture independent portion. Now crash_notes is architecture independent. The whole idea is that size of memory to be allocated per cpu (MAX_NOTE_BYTES) can be architecture dependent and allocation of this memory can be architecture independent. Signed-off-by: Vivek Goyal <vgoyal@in.ibm.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'include/asm-s390')
-rw-r--r--include/asm-s390/kexec.h3
1 files changed, 0 insertions, 3 deletions
diff --git a/include/asm-s390/kexec.h b/include/asm-s390/kexec.h
index 54cf7d9f251c..b4809d98fe69 100644
--- a/include/asm-s390/kexec.h
+++ b/include/asm-s390/kexec.h
@@ -35,8 +35,5 @@
35#define KEXEC_ARCH KEXEC_ARCH_S390 35#define KEXEC_ARCH KEXEC_ARCH_S390
36 36
37#define MAX_NOTE_BYTES 1024 37#define MAX_NOTE_BYTES 1024
38typedef u32 note_buf_t[MAX_NOTE_BYTES/4];
39
40extern note_buf_t crash_notes[];
41 38
42#endif /*_S390_KEXEC_H */ 39#endif /*_S390_KEXEC_H */