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Andi Kleen 0835ab53ea cgroup memory controller: document huge memory/cache overhead in Kconfig

Document huge memory/cache overhead of memory controller in Kconfig

I was a little surprised that 2.6.25-rc* increased struct page for the
memory controller.  At least on many x86-64 machines it will not fit into a
single cache line now anymore and also costs considerable amounts of RAM.
At earlier review I remembered asking for a external data structure for
this.

It's also quite unobvious that a innocent looking Kconfig option with a
single line Kconfig description has such a negative effect.

This patch attempts to document these disadvantages at least so that users
configuring their kernel can make a informed decision.

Signed-off-by: Andi Kleen <ak@suse.de>
Cc: Balbir Singh <balbir@in.ibm.com>
Acked-by: Paul Menage <menage@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

2008-02-23 17:12:16 -08:00

calibrate.c

calibrate_delay() must be __cpuinit

2008-02-06 10:41:08 -08:00

do_mounts_initrd.c

Freezer: Fix s2disk resume from initrd

2007-11-20 22:22:42 -05:00

do_mounts_md.c

[PATCH] md: remove MAX_MD_DEVS which is an arbitrary limit

2006-10-03 08:04:18 -07:00

do_mounts_rd.c

sparse pointer use of zero as null