Hi, This is V5 patch series that provide the ability for each memory cgroup to have independent dirty/writeback page statistics. Previous version is here: V4 - http://www.spinics.net/lists/cgroups/msg08200.html; V3 - http://lwn.net/Articles/530776/; V2 - http://lwn.net/Articles/508452/; V1 - http://lwn.net/Articles/504017/; The first three patches are doing some cleanup and prepare works. The first two is nothing changed since V3 and patch 3/8 is a new one to check proper locks held. Patch 4/8 and 5/8 are doing memcg dirty and writeback page accounting, which adds statistic codes in several hot paths. Patch 6/8 and 7/8 are trying to wipe off the overheads introduced in by previous two patches, and this is the main changes towards V3. Patch 6 is a prepare one to make nocpu_base available for all usages not only hotplug cases. I stealed it from Glauber Costa - http://www.spinics.net/lists/cgroups/msg06233.html. Patch 7 is doing some optimization by jump label: if only root memcg exists, we don't need to do page stat accounting and transfer global page stats to root only when the first non-root memcg is created. Some perforcemance numbers got by Mel's pft test (On a 4g memory and 4-core i5 CPU machine): vanilla : memcg enabled, patch not applied patched : all patches are patched * Duration numbers: vanilla patched User 385.38 379.47 System 65.12 66.46 Elapsed 457.46 452.21 * Summary numbers: vanilla: Clients User System Elapsed Faults/cpu Faults/sec 1 0.03 0.18 0.21 931682.645 910993.850 2 0.03 0.22 0.13 760431.152 1472985.863 3 0.03 0.29 0.12 600495.043 1620311.084 4 0.04 0.37 0.12 475380.531 1688013.267 patched: Clients User System Elapsed Faults/cpu Faults/sec 1 0.02 0.19 0.22 915362.875 898763.732 2 0.03 0.23 0.13 757518.387 1464893.996 3 0.03 0.30 0.12 592113.126 1611873.469 4 0.04 0.38 0.12 472203.393 1680013.271 We can see the performance gap is minor. Change log: v5 <-- v4: 1. add patch 3 to check proper lock held suggested by Michal Hock 2. add another two interfaces which should call mem_cgroup_begin/end_ update_page_stat() in dirty page accounting 3. make nobase_cpu not only used in hotplug cases 4. don't account root memcg page stats if only root exist v4 <-- v3: 1. give up reworking vfs codes 2. change lock order of memcg->move_lock and mapping->tree_lock 3. patch out mem_cgroup_{begin,end}_update_page_stat when not used 4. rebased to since-3.10 branch v3 <-- v2: 1. change lock order of mapping->tree_lock and memcg->move_lock 2. performance optimization in 6/8 and 7/8 v2 <-- v1: 1. add test numbers 2. some small fix and comments Glauber Costa (1): memcg: make nocpu_base available for non-hotplug Sha Zhengju (7): memcg: remove MEMCG_NR_FILE_MAPPED fs/ceph: vfs __set_page_dirty_nobuffers interface instead of doing it inside filesystem memcg: check for proper lock held in mem_cgroup_update_page_stat memcg: add per cgroup dirty pages accounting memcg: add per cgroup writeback pages accounting memcg: patch mem_cgroup_{begin,end}_update_page_stat() out if only root memcg exists memcg: Document cgroup dirty/writeback memory statistics Documentation/cgroups/memory.txt | 2 + fs/buffer.c | 13 +++ fs/ceph/addr.c | 13 +-- include/linux/memcontrol.h | 47 ++++++++-- mm/filemap.c | 17 +++- mm/memcontrol.c | 189 +++++++++++++++++++++++++++++--------- mm/page-writeback.c | 39 +++++++- mm/rmap.c | 4 +- mm/truncate.c | 12 +++ mm/vmscan.c | 7 ++ 10 files changed, 273 insertions(+), 70 deletions(-) -- To unsubscribe from this list: send the line "unsubscribe cgroups" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
