linux-stable-rt/init
Eric Dumazet b73b459f72 [PATCH] __GENERIC_PER_CPU changes
Now CONFIG_DEBUG_INITDATA is in, initial percpu data
[__per_cpu_start,__per_cpu_end] can be declared as a redzone, and invalid
accesses after boot can be detected, at least for i386.

We can let non possible cpus percpu data point to this 'redzone' instead of
NULL .

NULL was not a good choice because part of [0..32768] memory may be
readable and invalid accesses may happen unnoticed.

If CONFIG_DEBUG_INITDATA is not defined, each non possible cpu points to
the initial percpu data (__per_cpu_offset[cpu] == 0), thus invalid accesses
wont be detected/crash.

This patch also moves __per_cpu_offset[] to read_mostly area to avoid false
sharing.

Signed-off-by: Eric Dumazet <dada1@cosmosbay.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-03-23 07:38:17 -08:00
..
Kconfig
Makefile
calibrate.c
do_mounts.c
do_mounts.h
do_mounts_devfs.c
do_mounts_initrd.c [PATCH] swsusp: userland interface 2006-03-23 07:38:07 -08:00
do_mounts_md.c
do_mounts_rd.c
initramfs.c [PATCH] kexec: fix in free initrd when overlapped with crashkernel region 2006-02-10 08:13:12 -08:00
main.c [PATCH] __GENERIC_PER_CPU changes 2006-03-23 07:38:17 -08:00
version.c