android_kernel_xiaomi_sm8350/arch/ia64
Simon Horman 6672f76a5a kdump/kexec: calculate note size at compile time
Currently the size of the per-cpu region reserved to save crash notes is
set by the per-architecture value MAX_NOTE_BYTES.  Which in turn is
currently set to 1024 on all supported architectures.

While testing ia64 I recently discovered that this value is in fact too
small.  The particular setup I was using actually needs 1172 bytes.  This
lead to very tedious failure mode where the tail of one elf note would
overwrite the head of another if they ended up being alocated sequentially
by kmalloc, which was often the case.

It seems to me that a far better approach is to caclculate the size that
the area needs to be.  This patch does just that.

If a simpler stop-gap patch for ia64 to be squeezed into 2.6.21(.X) is
needed then this should be as easy as making MAX_NOTE_BYTES larger in
arch/asm-ia64/kexec.h.  Perhaps 2048 would be a good choice.  However, I
think that the approach in this patch is a much more robust idea.

Acked-by:  Vivek Goyal <vgoyal@in.ibm.com>
Signed-off-by: Simon Horman <horms@verge.net.au>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-05-08 11:15:07 -07:00
..
configs [IA64] refresh config files 2007-03-08 11:20:17 -08:00
dig [PATCH] tty: Remove include of screen_info.h from tty.h 2006-07-10 13:24:16 -07:00
hp [SK_BUFF]: Introduce skb_copy_to_linear_data{_offset} 2007-04-25 22:28:29 -07:00
ia32 header cleaning: don't include smp_lock.h when not used 2007-05-08 11:15:07 -07:00
kernel kdump/kexec: calculate note size at compile time 2007-05-08 11:15:07 -07:00
lib [AF_RXRPC/AFS]: Arch-specific fixes. 2007-04-27 15:28:45 -07:00
mm header cleaning: don't include smp_lock.h when not used 2007-05-08 11:15:07 -07:00
oprofile Remove obsolete #include <linux/config.h> 2006-06-30 19:25:36 +02:00
pci header cleaning: don't include smp_lock.h when not used 2007-05-08 11:15:07 -07:00
scripts
sn move die notifier handling to common code 2007-05-08 11:15:04 -07:00
defconfig Pull error-inject into release branch 2007-04-30 13:55:43 -07:00
install.sh
Kconfig Merge git://git.kernel.org/pub/scm/linux/kernel/git/aegl/linux-2.6 2007-05-07 12:34:57 -07:00
Kconfig.debug
Makefile [IA64] add vmlinuz target 2006-06-21 14:31:07 -07:00
module.lds