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
..
a.out.h
appldata.h
[S390] Inline assembly cleanup.
2006-09-28 16:56:43 +02:00
atomic.h
[S390] add atomic64_xchg to s390
2007-02-21 10:55:59 +01:00
auxvec.h
bitops.h
[S390] Inline assembly cleanup.
2006-09-28 16:56:43 +02:00
bug.h
[S390] Use generic bug.
2007-04-27 16:01:42 +02:00
bugs.h
[S390] check_bugs() should be inline.
2007-03-05 23:35:50 +01:00
byteorder.h
[S390] Inline assembly cleanup.
2006-09-28 16:56:43 +02:00
cache.h
[PATCH] s390: add read_mostly optimization
2006-04-28 08:33:48 -07:00
cacheflush.h
[PATCH] Optimize D-cache alias handling on fork
2006-12-13 09:27:08 -08:00
ccwdev.h
[S390] cio: Deprecate read_dev_chars() and read_conf_data{,_lpm}().
2007-05-04 18:48:25 +02:00
ccwgroup.h
[S390] cio: ccwgroup register vs. unregister.
2007-04-27 16:01:41 +02:00
checksum.h
[S390] Fix TCP/UDP pseudo header checksum computation.
2007-03-26 20:43:46 +02:00
chpid.h
[S390] cio: Channel-path configure function.
2007-04-27 16:01:39 +02:00
cio.h
[S390] cio: Channel-path configure function.
2007-04-27 16:01:39 +02:00
cmb.h
[S390] rework of channel measurement facility.
2006-06-29 15:08:41 +02:00
compat.h
[S390] noexec protection
2007-02-05 21:18:17 +01:00
cpcmd.h
[S390] cpcmd <-> __cpcmd calling issues
2006-12-04 15:40:30 +01:00
cputime.h
current.h
dasd.h
[S390] New DASD feature for ERP related logging
2006-12-08 15:54:15 +01:00
debug.h
[PATCH] Fix 'make headers_check' on s390
2006-09-16 12:54:31 -07:00
delay.h
device.h
Driver core: add dev_archdata to struct device
2006-12-01 14:52:01 -08:00
div64.h
[S390] __div64_32 for 31 bit.
2006-09-28 16:55:39 +02:00
dma-mapping.h
Introduce CONFIG_HAS_DMA
2007-05-07 12:12:51 -07:00
dma.h
[S390] empty function defines.
2006-09-20 15:58:51 +02:00
ebcdic.h
[S390] Inline assembly cleanup.
2006-09-28 16:56:43 +02:00
elf.h
[S390] add hardware capability support (ELF_HWCAP).
2007-05-04 18:48:35 +02:00
emergency-restart.h
errno.h
etr.h
[S390] ETR support.
2007-02-05 21:18:19 +01:00
extmem.h
fcntl.h
futex.h
[S390] don't call handle_mm_fault() if in an atomic context.
2007-01-09 10:18:50 +01:00
hardirq.h
[S390] ETR support.
2007-02-05 21:18:19 +01:00
idals.h
Don't include linux/config.h from anywhere else in include/
2006-04-26 12:56:16 +01:00
io.h
[S390] remove __io_virt and mmiowb.
2007-02-12 15:49:57 +01:00
ioctl.h
[PATCH] Generic ioctl.h
2006-01-10 08:01:34 -08:00
ioctls.h
ipc.h
ipcbuf.h
ipl.h
[S390] zfcpdump support.
2007-04-27 16:01:44 +02:00
irq.h
[PATCH] Make touch_nmi_watchdog imply touch_softlockup_watchdog on all archs
2006-09-29 09:18:05 -07:00
irq_regs.h
[S390] irq change build fixes.
2006-10-06 16:38:35 +02:00
irqflags.h
[S390] Inline assembly cleanup.
2006-09-28 16:56:43 +02:00
Kbuild
[S390] Unexport <asm/z90crypt.h>, export <asm/zcrypt.h> in its place.
2006-09-24 22:07:25 +01:00
kdebug.h
move die notifier handling to common code
2007-05-08 11:15:04 -07:00
kexec.h
kdump/kexec: calculate note size at compile time
2007-05-08 11:15:07 -07:00
kmap_types.h
kprobes.h
[S390] get rid of kprobes notifier call chain.
2007-05-04 18:48:24 +02:00
linkage.h
local.h
[S390] local_t cleanup : use asm-generic/local.h.
2007-02-21 10:55:55 +01:00
lowcore.h
[S390] add hardware capability support (ELF_HWCAP).
2007-05-04 18:48:35 +02:00
mathemu.h
mman.h
[PATCH] add asm-generic/mman.h
2006-02-15 15:32:22 -08:00
mmu.h
mmu_context.h
[PATCH] x86: PARAVIRT: add hooks to intercept mm creation and destruction
2007-05-02 19:27:14 +02:00
module.h
monwriter.h
[S390] Linux API for writing z/VM APPLDATA Monitor records.
2006-09-20 15:59:34 +02:00
msgbuf.h
mutex.h
[PATCH] mutex subsystem, add default include/asm-*/mutex.h files
2006-01-09 15:59:19 -08:00
namei.h
page.h
[S390] Virtual memmap for s390.
2006-12-08 15:56:07 +01:00
param.h
pci.h
percpu.h
[PATCH] Fix typo in "syntax error if percpu macros are incorrectly used" patch
2006-10-06 08:53:41 -07:00
pgalloc.h
[S390] noexec protection
2007-02-05 21:18:17 +01:00
pgtable.h
[S390] split page_test_and_clear_dirty.
2007-04-27 16:01:46 +02:00
poll.h
[PATCH] POLLRDHUP/EPOLLRDHUP handling for half-closed devices notifications
2006-03-25 08:22:56 -08:00
posix_types.h
[PATCH] FD_ZERO build fix
2007-01-11 18:18:22 -08:00
processor.h
[S390] Processor degradation notification.
2007-04-27 16:01:46 +02:00
ptrace.h
[S390] noexec protection
2007-02-05 21:18:17 +01:00
qdio.h
[S390] Hipersocket multicast queue: make sure outbound handler is called
2006-12-15 17:18:14 +01:00
qeth.h
reset.h
[S390] Convert memory detection into C code.
2007-02-05 21:18:37 +01:00
resource.h
rwsem.h
[S390] Inline assembly cleanup.
2006-09-28 16:56:43 +02:00
s390_ext.h
[S390] irq change build fixes.
2006-10-06 16:38:35 +02:00
s390_rdev.h
[PATCH] s390: email-address change
2006-01-14 18:27:10 -08:00
scatterlist.h
sclp.h
[S390] zfcpdump support.
2007-04-27 16:01:44 +02:00
sections.h
[S390] nss: Free unused memory in kernel image.
2007-02-21 10:55:37 +01:00
segment.h
semaphore.h
[S390] Inline assembly cleanup.
2006-09-28 16:56:43 +02:00
sembuf.h
setup.h
[S390] zfcpdump support.
2007-04-27 16:01:44 +02:00
sfp-machine.h
[S390] Inline assembly cleanup.
2006-09-28 16:56:43 +02:00
sfp-util.h
[S390] Calibrate delay and bogomips.
2007-02-05 21:18:31 +01:00
shmbuf.h
shmparam.h
sigcontext.h
[PATCH] s390: sigcontext.h vs __user
2006-01-14 18:27:08 -08:00
siginfo.h
signal.h
[PATCH] irq-flags: S390: Use the new IRQF_ constants
2006-07-02 13:58:48 -07:00
sigp.h
[S390] Inline assembly cleanup.
2006-09-28 16:56:43 +02:00
smp.h
[S390] Clean up smp code in preparation for some larger changes.
2007-04-27 16:01:47 +02:00
socket.h
[NET]: Adding SO_TIMESTAMPNS / SCM_TIMESTAMPNS support
2007-04-25 22:24:21 -07:00
sockios.h
[NET]: Introduce SIOCGSTAMPNS ioctl to get timestamps with nanosec resolution
2007-04-25 22:24:04 -07:00
spinlock.h
[S390] incorrect placement of include.
2006-10-04 20:02:12 +02:00
spinlock_types.h
[PATCH] Directed yield: direct yield of spinlocks for s390.
2006-10-01 00:39:22 -07:00
stat.h
statfs.h
string.h
[S390] Inline assembly cleanup.
2006-09-28 16:56:43 +02:00
suspend.h
system.h
[S390] noexec protection
2007-02-05 21:18:17 +01:00
tape390.h
[S390] Add crypto support for 3592 tape devices
2007-02-05 21:18:26 +01:00
termbits.h
[PATCH] tty: preparatory structures for termios revamp
2006-12-08 08:28:56 -08:00
termios.h
[PATCH] consolidate line discipline number definitions
2007-02-11 10:51:26 -08:00
thread_info.h
[S390] preempt_count initialization.
2006-06-29 15:02:47 +02:00
timer.h
[S390] Get rid of a lot of sparse warnings.
2007-02-05 21:16:47 +01:00
timex.h
[S390] Support for s390 Pseudo Random Number Generator
2007-02-05 21:18:22 +01:00
tlb.h
tlbflush.h
[S390] noexec protection
2007-02-05 21:18:17 +01:00
todclk.h
topology.h
types.h
[PATCH] Centralise definitions of sector_t and blkcnt_t
2006-12-04 19:41:15 -08:00
uaccess.h
[S390] noexec protection
2007-02-05 21:18:17 +01:00
ucontext.h
unaligned.h
unistd.h
[S390] Wire up sys_utimes.
2007-03-19 13:19:07 +01:00
user.h
vtoc.h
Use __uXX types for S390 DASD volume label definitions which are user-visible
2006-05-04 01:18:33 +01:00
xor.h
zcrypt.h
[S390] update interface notes in zcrypt.h
2006-12-04 15:40:00 +01:00