| From: |
| KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> |
| To: |
| "linux-mm@kvack.org" <linux-mm@kvack.org> |
| Subject: |
| [PATCH 0/6 v4] memcg: page cgroup diet |
| Date: |
| Tue, 14 Feb 2012 12:04:14 +0900 |
| Message-ID: |
| <20120214120414.025625c2.kamezawa.hiroyu@jp.fujitsu.com> |
| Cc: |
| "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"hannes@cmpxchg.org" <hannes@cmpxchg.org>,
Michal Hocko <mhocko@suse.cz>,
"akpm@linux-foundation.org" <akpm@linux-foundation.org>,
Ying Han <yinghan@google.com>, Hugh Dickins <hughd@google.com> |
| Archive‑link: | |
Article |
Here is v4. I removed RFC and fixed a fatal bug in v3.
This patch series is a preparetion for removing page_cgroup->flags. To remove
it, we need to reduce flags on page_cgroup. In this set, PCG_MOVE_LOCK and
PCG_FILE_MAPPED are remvoed.
After this, we only have 3 bits.
==
enum {
/* flags for mem_cgroup */
PCG_LOCK, /* Lock for pc->mem_cgroup and following bits. */
PCG_USED, /* this object is in use. */
PCG_MIGRATION, /* under page migration */
__NR_PCG_FLAGS,
};
==
I'll make a try to merge this 3bits to lower 3bits of pointer to
memcg. Then, we can make page_cgroup 8(4)bytes per page.
Major changes since v3 are
- replaced move_lock_page_cgroup() with move_lock_mem_cgroup().
passes pointer to memcg rather than page_cgroup.
Working on linux-next feb13 and passed several tests.
Thanks,
-Kame
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