V4 -> V5: - Rename the global functions, as suggested by Andrew. - Save some macros, as suggested by Andrew. - Change the high threshold, from 32G to 4G. - Change the low threshold on ppc, suggested by ppc developers. - Make the mm part as a seperate function, suggest by Eric. - Make the IA64 code more readable. - Reorder the patchset again, since review from mm people is done. V3 -> V4: - Reorder the patches. - Really free the reserved memory, instead of remapping it. (Thanks to KAMEZAWA Hiroyuki!) - Release the reserved memory resource when the size is 0. - Use strict_strtoul() instead of simple_strtoul(). V2 -> V3: - Use more clever way to calculate reserved memory size, especially for IA64. - Add that patch that implements shrinking reserved memory V1 -> V2: - Use include/asm-generic/kexec.h, suggested by Neil. - Rename a local variable, suggested by Fenghua. - Fix some style problems found by checkpatch.pl. - Unify the Kconfig docs. This series of patch implements automatically reserved memory for crashkernel, by introducing a new boot option "crashkernel=auto". This idea is from Neil. In case of breaking user-space applications, it modifies this boot option after it decides how much memory should be reserved. On different arch, the threshold and reserved memory size is different. Please refer patch 7/8 which contains an update for the documentation. Patch 8/8 implements shrinking reserved memory at run-time, which is useful when more than enough memory is reserved automatically. This patchset _is_ already tested on x86_64, IA64 and ppc64. Cc: Neil Horman <nhorman@xxxxxxxxxx> Cc: M. Mohan Kumar <mohan@xxxxxxxxxx> Cc: Michael Ellerman <michael@xxxxxxxxxxxxxx> Cc: Eric W. Biederman <ebiederm@xxxxxxxxxxxx> Cc: Ingo Molnar <mingo@xxxxxxx> Cc: Tony Luck <tony.luck@xxxxxxxxx> Cc: Anton Vorontsov <avorontsov@xxxxxxxxxxxxx> Cc: Andi Kleen <andi@xxxxxxxxxxxxxx> Cc: Fenghua Yu <fenghua.yu@xxxxxxxxx> Cc: Bernhard Walle <bernhard.walle@xxxxxx> Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@xxxxxxxxxxxxxx> Signed-off-by: WANG Cong <amwang@xxxxxxxxxx> --- Documentation/kdump/kdump.txt | 29 +++++++++ arch/ia64/Kconfig | 14 ++++ arch/ia64/include/asm/kexec.h | 44 +++++++++++++ arch/powerpc/Kconfig | 11 +++ arch/powerpc/include/asm/kexec.h | 39 ++++++++++++ arch/x86/Kconfig | 13 ++++ arch/x86/include/asm/kexec.h | 1 include/asm-generic/kexec.h | 16 +++++ include/linux/kexec.h | 2 kernel/kexec.c | 124 +++++++++++++++++++++++++++++++++++++++ kernel/ksysfs.c | 21 ++++++ 11 files changed, 314 insertions(+) -- To unsubscribe from this list: send the line "unsubscribe linux-ia64" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
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