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 8/8 which contains an update for the documentation. Patch 1/8 implements shrinking reserved memory at run-time, which is useful when more than enough memory is reserved automatically. Note: This patchset was only tested on x86_64 with differernt memory sizes. Cc: Neil Horman <nhorman@xxxxxxxxxx> 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 | 28 ++++++ arch/ia64/Kconfig | 14 +++ arch/ia64/include/asm/kexec.h | 23 ++++ arch/powerpc/Kconfig | 11 ++ arch/powerpc/include/asm/kexec.h | 8 + arch/x86/Kconfig | 13 ++ arch/x86/include/asm/kexec.h | 1 include/asm-generic/kexec.h | 42 +++++++++ include/linux/kexec.h | 5 + kernel/kexec.c | 180 +++++++++++++++++++++++++++++++++++++++ kernel/ksysfs.c | 46 +++++++++ 11 files changed, 371 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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