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Shaohua Li 33806f06da swap: make each swap partition have one address_space 
When I use several fast SSD to do swap, swapper_space.tree_lock is
heavily contended.  This makes each swap partition have one
address_space to reduce the lock contention.  There is an array of
address_space for swap.  The swap entry type is the index to the array.

In my test with 3 SSD, this increases the swapout throughput 20%.

[akpm@linux-foundation.org: revert unneeded change to  __add_to_swap_cache]
Signed-off-by: Shaohua Li <shli@fusionio.com>
Cc: Hugh Dickins <hughd@google.com>
Acked-by: Rik van Riel <riel@redhat.com>
Acked-by: Minchan Kim <minchan@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
 		2013-02-23 17:50:17 -08:00
..
Kconfig kconfig: rename CONFIG_EMBEDDED to CONFIG_EXPERT 2011-01-20 17:02:05 -08:00
Makefile tty: Added a CONFIG_TTY option to allow removal of TTY 2013-01-18 16:15:27 -08:00
array.c cputime: Use accessors to read task cputime stats 2013-01-27 19:23:31 +01:00
base.c procfs: drop vmtruncate 2012-12-20 14:00:01 -05:00
cmdline.c
…
consoles.c console: rename acquire/release_console_sem() to console_lock/unlock() 2011-01-26 10:50:06 +10:00
cpuinfo.c proc: move /proc/cpuinfo code to fs/proc/cpuinfo.c 2008-10-23 15:05:11 +04:00
devices.c proc: use seq_puts()/seq_putc() where possible 2011-01-13 08:03:16 -08:00
fd.c procfs: add ability to plug in auxiliary fdinfo providers 2012-12-17 17:15:27 -08:00
fd.h procfs: Move /proc/pid/fd[info] handling code to fd.[ch] 2012-09-26 21:10:01 -04:00
generic.c proc: Allow proc_free_inum to be called from any context 2012-12-25 16:23:12 -08:00
inode.c proc: Fix the namespace inode permission checks. 2012-11-20 04:19:48 -08:00
internal.h procfs: Use the proc generic infrastructure for proc/self. 2012-11-19 03:09:34 -08:00
interrupts.c proc: move /proc/interrupts boilerplate code to fs/proc/interrupts.c 2008-10-23 15:15:46 +04:00
kcore.c procfs: use N_MEMORY instead N_HIGH_MEMORY 2012-12-12 17:38:32 -08:00
kmsg.c procfs: Use generic_file_llseek in /proc/kmsg 2010-04-09 16:35:41 +02:00
loadavg.c sched, timers: cleanup avenrun users 2009-05-15 15:32:45 +02:00
meminfo.c swap: make each swap partition have one address_space 2013-02-23 17:50:17 -08:00
mmu.c
…
namespaces.c proc: Usable inode numbers for the namespace file descriptors. 2012-11-20 04:19:49 -08:00
nommu.c include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
page.c kpageflags: fix wrong KPF_THP on non-huge compound pages 2012-10-09 16:23:00 +09:00
proc_devtree.c procfs: use kbasename() 2012-12-17 17:15:17 -08:00
proc_net.c net: proc: remove proc_net_remove 2013-02-18 14:53:08 -05:00
proc_sysctl.c procfs: drop vmtruncate 2012-12-20 14:00:01 -05:00
proc_tty.c proc: use seq_puts()/seq_putc() where possible 2011-01-13 08:03:16 -08:00
root.c userns: Allow unprivilged mounts of proc and sysfs 2012-11-20 04:19:18 -08:00
self.c procfs: Use the proc generic infrastructure for proc/self. 2012-11-19 03:09:34 -08:00
softirqs.c proc: use seq_puts()/seq_putc() where possible 2011-01-13 08:03:16 -08:00
stat.c nohz: Fix idle ticks in cpu summary line of /proc/stat 2012-10-10 14:05:21 +02:00
task_mmu.c mempolicy: remove arg from mpol_parse_str, mpol_to_str 2013-01-02 09:27:10 -08:00
task_nommu.c proc: remove mm_for_maps() 2012-05-31 17:49:28 -07:00
uptime.c Merge branch 'sched/core' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip into cputime-tip 2011-12-19 19:23:15 +01:00
version.c
…
vmcore.c fadump: Introduce cleanup routine to invalidate /proc/vmcore. 2012-02-23 10:50:02 +11:00