diff options
author | Hugh Dickins <hugh@veritas.com> | 2008-03-04 14:29:08 -0800 |
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committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2008-03-04 16:35:15 -0800 |
commit | 7e924aafa4b03ff71de34af8553d9a1ebc86c071 (patch) | |
tree | 21735b7369ede27f34c41184b0a686020b80e2c6 /mm/backing-dev.c | |
parent | 9442ec9df40d952b0de185ae5638a74970388e01 (diff) |
memcg: mem_cgroup_charge never NULL
My memcgroup patch to fix hang with shmem/tmpfs added NULL page handling to
mem_cgroup_charge_common. It seemed convenient at the time, but hard to
justify now: there's a perfectly appropriate swappage to charge and uncharge
instead, this is not on any hot path through shmem_getpage, and no performance
hit was observed from the slight extra overhead.
So revert that NULL page handling from mem_cgroup_charge_common; and make it
clearer by bringing page_cgroup_assign_new_page_cgroup into its body - that
was a helper I found more of a hindrance to understanding.
Signed-off-by: Hugh Dickins <hugh@veritas.com>
Cc: David Rientjes <rientjes@google.com>
Acked-by: Balbir Singh <balbir@linux.vnet.ibm.com>
Acked-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: Hirokazu Takahashi <taka@valinux.co.jp>
Cc: YAMAMOTO Takashi <yamamoto@valinux.co.jp>
Cc: Paul Menage <menage@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/backing-dev.c')
0 files changed, 0 insertions, 0 deletions