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SubjectRe: [PATCH -mmotm 3/3] memcg: dirty pages instrumentation
* Andrea Righi <arighi@develer.com> [2010-03-01 22:23:40]:

> Apply the cgroup dirty pages accounting and limiting infrastructure to
> the opportune kernel functions.
>
> Signed-off-by: Andrea Righi <arighi@develer.com>
> ---
> fs/fuse/file.c | 5 +++
> fs/nfs/write.c | 4 ++
> fs/nilfs2/segment.c | 10 +++++-
> mm/filemap.c | 1 +
> mm/page-writeback.c | 84 ++++++++++++++++++++++++++++++++------------------
> mm/rmap.c | 4 +-
> mm/truncate.c | 2 +
> 7 files changed, 76 insertions(+), 34 deletions(-)
>
> diff --git a/fs/fuse/file.c b/fs/fuse/file.c
> index a9f5e13..dbbdd53 100644
> --- a/fs/fuse/file.c
> +++ b/fs/fuse/file.c
> @@ -11,6 +11,7 @@
> #include <linux/pagemap.h>
> #include <linux/slab.h>
> #include <linux/kernel.h>
> +#include <linux/memcontrol.h>
> #include <linux/sched.h>
> #include <linux/module.h>
>
> @@ -1129,6 +1130,8 @@ static void fuse_writepage_finish(struct fuse_conn *fc, struct fuse_req *req)
>
> list_del(&req->writepages_entry);
> dec_bdi_stat(bdi, BDI_WRITEBACK);
> + mem_cgroup_update_stat(req->pages[0],
> + MEM_CGROUP_STAT_WRITEBACK_TEMP, -1);
> dec_zone_page_state(req->pages[0], NR_WRITEBACK_TEMP);
> bdi_writeout_inc(bdi);
> wake_up(&fi->page_waitq);
> @@ -1240,6 +1243,8 @@ static int fuse_writepage_locked(struct page *page)
> req->inode = inode;
>
> inc_bdi_stat(mapping->backing_dev_info, BDI_WRITEBACK);
> + mem_cgroup_update_stat(tmp_page,
> + MEM_CGROUP_STAT_WRITEBACK_TEMP, 1);
> inc_zone_page_state(tmp_page, NR_WRITEBACK_TEMP);
> end_page_writeback(page);
>
> diff --git a/fs/nfs/write.c b/fs/nfs/write.c
> index b753242..7316f7a 100644
> --- a/fs/nfs/write.c
> +++ b/fs/nfs/write.c

Don't need memcontrol.h to be included here?

Looks OK to me overall, but there might be objection using the
mem_cgroup_* naming convention, but I don't mind it very much :)

--
Three Cheers,
Balbir


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