Messages in this thread | | | Date | Fri, 21 Aug 2009 15:05:48 +0530 | From | Balbir Singh <> | Subject | Re: [PATCH -mmotm] memcg: show swap usage in stat file |
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* nishimura@mxp.nes.nec.co.jp <nishimura@mxp.nes.nec.co.jp> [2009-08-21 15:25:49]:
> We now count MEM_CGROUP_STAT_SWAPOUT, so we can show swap usage. > It would be useful for users to show swap usage in memory.stat file, > because they don't need calculate memsw.usage - res.usage to know swap usage. > > Signed-off-by: Daisuke Nishimura <nishimura@mxp.nes.nec.co.jp> > --- > mm/memcontrol.c | 17 ++++++++++++++--- > 1 files changed, 14 insertions(+), 3 deletions(-) > > diff --git a/mm/memcontrol.c b/mm/memcontrol.c > index 8b06c05..ae80de0 100644 > --- a/mm/memcontrol.c > +++ b/mm/memcontrol.c > @@ -2663,6 +2663,7 @@ enum { > MCS_MAPPED_FILE, > MCS_PGPGIN, > MCS_PGPGOUT, > + MCS_SWAP, > MCS_INACTIVE_ANON, > MCS_ACTIVE_ANON, > MCS_INACTIVE_FILE, > @@ -2684,6 +2685,7 @@ struct { > {"mapped_file", "total_mapped_file"}, > {"pgpgin", "total_pgpgin"}, > {"pgpgout", "total_pgpgout"}, > + {"swap", "total_swap"}, > {"inactive_anon", "total_inactive_anon"}, > {"active_anon", "total_active_anon"}, > {"inactive_file", "total_inactive_file"}, > @@ -2708,6 +2710,10 @@ static int mem_cgroup_get_local_stat(struct mem_cgroup *mem, void *data) > s->stat[MCS_PGPGIN] += val; > val = mem_cgroup_read_stat(&mem->stat, MEM_CGROUP_STAT_PGPGOUT_COUNT); > s->stat[MCS_PGPGOUT] += val; > + if (do_swap_account) { > + val = mem_cgroup_read_stat(&mem->stat, MEM_CGROUP_STAT_SWAPOUT); > + s->stat[MCS_SWAP] += val; > + } > > /* per zone stat */ > val = mem_cgroup_get_local_zonestat(mem, LRU_INACTIVE_ANON); > @@ -2739,8 +2745,11 @@ static int mem_control_stat_show(struct cgroup *cont, struct cftype *cft, > memset(&mystat, 0, sizeof(mystat)); > mem_cgroup_get_local_stat(mem_cont, &mystat); > > - for (i = 0; i < NR_MCS_STAT; i++) > + for (i = 0; i < NR_MCS_STAT; i++) { > + if (i == MCS_SWAP && !do_swap_account) > + continue;
May be worth encapsulating in a function like memcg_show_swapout
> cb->fill(cb, memcg_stat_strings[i].local_name, mystat.stat[i]); > + } > > /* Hierarchical information */ > { > @@ -2753,9 +2762,11 @@ static int mem_control_stat_show(struct cgroup *cont, struct cftype *cft, > > memset(&mystat, 0, sizeof(mystat)); > mem_cgroup_get_total_stat(mem_cont, &mystat); > - for (i = 0; i < NR_MCS_STAT; i++) > + for (i = 0; i < NR_MCS_STAT; i++) { > + if (i == MCS_SWAP && !do_swap_account) > + continue; > cb->fill(cb, memcg_stat_strings[i].total_name, mystat.stat[i]); > - > + } > > #ifdef CONFIG_DEBUG_VM > cb->fill(cb, "inactive_ratio", calc_inactive_ratio(mem_cont, NULL));
Overall, looks good
Reviewed-by: Balbir Singh <balbir@linux.vnet.ibm.com>
-- Balbir
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