linux/arch/ia64
Dave Hansen 208d54e551 [PATCH] memory hotplug locking: node_size_lock
pgdat->node_size_lock is basically only neeeded in one place in the normal
code: show_mem(), which is the arch-specific sysrq-m printing function.

Strictly speaking, the architectures not doing memory hotplug do no need this
locking in show_mem().  However, they are all included for completeness.  This
should also make any future consolidation of all of the implementations a
little more straightforward.

This lock is also held in the sparsemem code during a memory removal, as
sections are invalidated.  This is the place there pfn_valid() is made false
for a memory area that's being removed.  The lock is only required when doing
pfn_valid() operations on memory which the user does not already have a
reference on the page, such as in show_mem().

Signed-off-by: Dave Hansen <haveblue@us.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-10-29 21:40:44 -07:00
..
configs Pull sparsemem-v5 into release branch 2005-10-28 14:32:56 -07:00
dig Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
hp Merge branch 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/aegl/linux-2.6 2005-10-28 21:09:26 -07:00
ia32 [PATCH] error path in setup_arg_pages() misses vm_unacct_memory() 2005-09-14 11:18:13 -07:00
kernel [PATCH] mm: vm_stat_account unshackled 2005-10-29 21:40:37 -07:00
lib Merge branch 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/aegl/linux-2.6 2005-10-28 21:09:26 -07:00
mm [PATCH] memory hotplug locking: node_size_lock 2005-10-29 21:40:44 -07:00
oprofile Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
pci Pull acpi-produce-consume into release branch 2005-10-28 13:23:34 -07:00
scripts Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
sn Merge branch 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/aegl/linux-2.6 2005-10-28 21:09:26 -07:00
defconfig [IA64] Update default configs 2005-09-15 14:34:31 -07:00
install.sh Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
Kconfig Pull sparsemem-v5 into release branch 2005-10-28 14:32:56 -07:00
Kconfig.debug [PATCH] Kprobes/IA64: arch specific handling 2005-06-23 09:45:22 -07:00
Makefile [IA64] fix circular dependency on generation of asm-offsets.h 2005-09-13 08:50:39 -07:00
module.lds Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00