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authorVivek Goyal <vgoyal@in.ibm.com>2006-01-09 20:51:41 -0800
committerLinus Torvalds <torvalds@g5.osdl.org>2006-01-10 08:01:26 -0800
commitcc57165874e938ef684d71ba7d36e7088b551489 (patch)
treee1847f5547a7a426214e9ef0719eab908ee305d7 /drivers/base
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>
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