From: Dan Streetman <ddstreet@ieee.org> To: Minchan Kim <minchan@kernel.org> Cc: linux-mm@kvack.org, linux-kernel@vger.kernel.org, Sergey Senozhatsky <sergey.senozhatsky@gmail.com>, Nitin Gupta <ngupta@vflare.org>, Seth Jennings <sjennings@variantweb.net>, Andrew Morton <akpm@linux-foundation.org>, Dan Streetman <ddstreet@ieee.org> Subject: [PATCH 00/10] implement zsmalloc shrinking Date: Thu, 11 Sep 2014 16:53:51 -0400 [thread overview] Message-ID: <1410468841-320-1-git-send-email-ddstreet@ieee.org> (raw) Now that zswap can use zsmalloc as a storage pool via zpool, it will try to shrink its zsmalloc zs_pool once it reaches its max_pool_percent limit. These patches implement zsmalloc shrinking. The way the pool is shrunk is by finding a zspage and reclaiming it, by evicting each of its objects that is in use. Without these patches zswap, and any other future user of zpool/zsmalloc that attempts to shrink the zpool/zs_pool, will only get errors and will be unable to shrink its zpool/zs_pool. With the ability to shrink, zswap can keep the most recent compressed pages in memory. Note that the design of zsmalloc makes it impossible to actually find the LRU zspage, so each class and fullness group is searched in a round-robin method to find the next zspage to reclaim. Each fullness group orders its zspages in LRU order, so the oldest zspage is used for each fullness group. --- This patch set applies to linux-next. Dan Streetman (10): zsmalloc: fix init_zspage free obj linking zsmalloc: add fullness group list for ZS_FULL zspages zsmalloc: always update lru ordering of each zspage zsmalloc: move zspage obj freeing to separate function zsmalloc: add atomic index to find zspage to reclaim zsmalloc: add zs_ops to zs_pool zsmalloc: add obj_handle_is_free() zsmalloc: add reclaim_zspage() zsmalloc: add zs_shrink() zsmalloc: implement zs_zpool_shrink() with zs_shrink() drivers/block/zram/zram_drv.c | 2 +- include/linux/zsmalloc.h | 7 +- mm/zsmalloc.c | 314 +++++++++++++++++++++++++++++++++++++----- 3 files changed, 290 insertions(+), 33 deletions(-) -- 1.8.3.1
WARNING: multiple messages have this Message-ID (diff)
From: Dan Streetman <ddstreet@ieee.org> To: Minchan Kim <minchan@kernel.org> Cc: linux-mm@kvack.org, linux-kernel@vger.kernel.org, Sergey Senozhatsky <sergey.senozhatsky@gmail.com>, Nitin Gupta <ngupta@vflare.org>, Seth Jennings <sjennings@variantweb.net>, Andrew Morton <akpm@linux-foundation.org>, Dan Streetman <ddstreet@ieee.org> Subject: [PATCH 00/10] implement zsmalloc shrinking Date: Thu, 11 Sep 2014 16:53:51 -0400 [thread overview] Message-ID: <1410468841-320-1-git-send-email-ddstreet@ieee.org> (raw) Now that zswap can use zsmalloc as a storage pool via zpool, it will try to shrink its zsmalloc zs_pool once it reaches its max_pool_percent limit. These patches implement zsmalloc shrinking. The way the pool is shrunk is by finding a zspage and reclaiming it, by evicting each of its objects that is in use. Without these patches zswap, and any other future user of zpool/zsmalloc that attempts to shrink the zpool/zs_pool, will only get errors and will be unable to shrink its zpool/zs_pool. With the ability to shrink, zswap can keep the most recent compressed pages in memory. Note that the design of zsmalloc makes it impossible to actually find the LRU zspage, so each class and fullness group is searched in a round-robin method to find the next zspage to reclaim. Each fullness group orders its zspages in LRU order, so the oldest zspage is used for each fullness group. --- This patch set applies to linux-next. Dan Streetman (10): zsmalloc: fix init_zspage free obj linking zsmalloc: add fullness group list for ZS_FULL zspages zsmalloc: always update lru ordering of each zspage zsmalloc: move zspage obj freeing to separate function zsmalloc: add atomic index to find zspage to reclaim zsmalloc: add zs_ops to zs_pool zsmalloc: add obj_handle_is_free() zsmalloc: add reclaim_zspage() zsmalloc: add zs_shrink() zsmalloc: implement zs_zpool_shrink() with zs_shrink() drivers/block/zram/zram_drv.c | 2 +- include/linux/zsmalloc.h | 7 +- mm/zsmalloc.c | 314 +++++++++++++++++++++++++++++++++++++----- 3 files changed, 290 insertions(+), 33 deletions(-) -- 1.8.3.1 -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@kvack.org"> email@kvack.org </a>
next reply other threads:[~2014-09-11 20:54 UTC|newest] Thread overview: 43+ messages / expand[flat|nested] mbox.gz Atom feed top 2014-09-11 20:53 Dan Streetman [this message] 2014-09-11 20:53 ` [PATCH 00/10] implement zsmalloc shrinking Dan Streetman 2014-09-11 20:53 ` [PATCH 01/10] zsmalloc: fix init_zspage free obj linking Dan Streetman 2014-09-11 20:53 ` Dan Streetman 2014-09-12 3:16 ` Seth Jennings 2014-09-12 4:59 ` Minchan Kim 2014-09-12 4:59 ` Minchan Kim 2014-09-12 16:43 ` Dan Streetman 2014-09-12 16:43 ` Dan Streetman 2014-09-14 23:24 ` Minchan Kim 2014-09-14 23:24 ` Minchan Kim 2014-09-15 20:58 ` [PATCH] zsmalloc: simplify " Dan Streetman 2014-09-15 20:58 ` Dan Streetman 2014-09-16 2:41 ` Minchan Kim 2014-09-16 2:41 ` Minchan Kim 2014-09-11 20:53 ` [PATCH 02/10] zsmalloc: add fullness group list for ZS_FULL zspages Dan Streetman 2014-09-11 20:53 ` Dan Streetman 2014-09-11 20:53 ` [PATCH 03/10] zsmalloc: always update lru ordering of each zspage Dan Streetman 2014-09-11 20:53 ` Dan Streetman 2014-09-12 3:20 ` Seth Jennings 2014-09-11 20:53 ` [PATCH 04/10] zsmalloc: move zspage obj freeing to separate function Dan Streetman 2014-09-11 20:53 ` Dan Streetman 2014-09-11 20:53 ` [PATCH 05/10] zsmalloc: add atomic index to find zspage to reclaim Dan Streetman 2014-09-11 20:53 ` Dan Streetman 2014-09-11 20:53 ` [PATCH 06/10] zsmalloc: add zs_ops to zs_pool Dan Streetman 2014-09-11 20:53 ` Dan Streetman 2014-09-11 20:53 ` [PATCH 07/10] zsmalloc: add obj_handle_is_free() Dan Streetman 2014-09-11 20:53 ` Dan Streetman 2014-09-11 20:53 ` [PATCH 08/10] zsmalloc: add reclaim_zspage() Dan Streetman 2014-09-11 20:53 ` Dan Streetman 2014-09-11 20:54 ` [PATCH 09/10] zsmalloc: add zs_shrink() Dan Streetman 2014-09-11 20:54 ` Dan Streetman 2014-09-11 20:54 ` [PATCH 10/10] zsmalloc: implement zs_zpool_shrink() with zs_shrink() Dan Streetman 2014-09-11 20:54 ` Dan Streetman 2014-09-12 3:14 ` [PATCH 00/10] implement zsmalloc shrinking Seth Jennings 2014-09-12 5:46 ` Minchan Kim 2014-09-12 5:46 ` Minchan Kim 2014-09-12 17:05 ` Dan Streetman 2014-09-12 17:05 ` Dan Streetman 2014-09-15 0:00 ` Minchan Kim 2014-09-15 0:00 ` Minchan Kim 2014-09-15 14:29 ` Dan Streetman 2014-09-15 14:29 ` Dan Streetman
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