From: Glauber Costa <glommer@parallels.com> To: David Rientjes <rientjes@google.com> Cc: <cgroups@vger.kernel.org>, <linux-mm@kvack.org>, Andrew Morton <akpm@linux-foundation.org>, <linux-kernel@vger.kernel.org>, Frederic Weisbecker <fweisbec@gmail.com>, Pekka Enberg <penberg@kernel.org>, Michal Hocko <mhocko@suse.cz>, Johannes Weiner <hannes@cmpxchg.org>, Christoph Lameter <cl@linux.com>, <devel@openvz.org>, <kamezawa.hiroyu@jp.fujitsu.com>, Tejun Heo <tj@kernel.org>, Suleiman Souhlal <suleiman@google.com> Subject: Re: [PATCH 02/11] memcg: Reclaim when more than one page needed. Date: Thu, 28 Jun 2012 00:47:24 +0400 [thread overview] Message-ID: <4FEB715C.3090102@parallels.com> (raw) In-Reply-To: <alpine.DEB.2.00.1206271246380.22162@chino.kir.corp.google.com> On 06/27/2012 11:48 PM, David Rientjes wrote: > On Wed, 27 Jun 2012, Glauber Costa wrote: > >>> @@ -2206,7 +2214,7 @@ static int mem_cgroup_do_charge(struct mem_cgroup >>> *memcg, gfp_t gfp_mask, >>>> * unlikely to succeed so close to the limit, and we fall back >>>> * to regular pages anyway in case of failure. >>>> */ >>>> - if (nr_pages == 1 && ret) >>>> + if (nr_pages <= NR_PAGES_TO_RETRY && ret) >>>> return CHARGE_RETRY; >> >> Changed to costly order. >> > > 1 << PAGE_ALLOC_COSTLY_ORDER was the suggestion. That is what I meant - to the costly order suggestion - , should have been more explicit. >> One more thing. The original version of this patch included >> a cond_resched() here, that was also removed. From my re-reading >> of the code in page_alloc.c and vmscan.c now, I tend to think >> this is indeed not needed, since any cond_resched()s that might >> be needed to ensure the safety of the code will be properly >> inserted by the reclaim code itself, so there is no need for us >> to include any when we signal that a retry is needed. >> > > For __GFP_WAIT, that sounds like a safe guarantee. >
WARNING: multiple messages have this Message-ID (diff)
From: Glauber Costa <glommer@parallels.com> To: David Rientjes <rientjes@google.com> Cc: cgroups@vger.kernel.org, linux-mm@kvack.org, Andrew Morton <akpm@linux-foundation.org>, linux-kernel@vger.kernel.org, Frederic Weisbecker <fweisbec@gmail.com>, Pekka Enberg <penberg@kernel.org>, Michal Hocko <mhocko@suse.cz>, Johannes Weiner <hannes@cmpxchg.org>, Christoph Lameter <cl@linux.com>, devel@openvz.org, kamezawa.hiroyu@jp.fujitsu.com, Tejun Heo <tj@kernel.org>, Suleiman Souhlal <suleiman@google.com> Subject: Re: [PATCH 02/11] memcg: Reclaim when more than one page needed. Date: Thu, 28 Jun 2012 00:47:24 +0400 [thread overview] Message-ID: <4FEB715C.3090102@parallels.com> (raw) In-Reply-To: <alpine.DEB.2.00.1206271246380.22162@chino.kir.corp.google.com> On 06/27/2012 11:48 PM, David Rientjes wrote: > On Wed, 27 Jun 2012, Glauber Costa wrote: > >>> @@ -2206,7 +2214,7 @@ static int mem_cgroup_do_charge(struct mem_cgroup >>> *memcg, gfp_t gfp_mask, >>>> * unlikely to succeed so close to the limit, and we fall back >>>> * to regular pages anyway in case of failure. >>>> */ >>>> - if (nr_pages == 1 && ret) >>>> + if (nr_pages <= NR_PAGES_TO_RETRY && ret) >>>> return CHARGE_RETRY; >> >> Changed to costly order. >> > > 1 << PAGE_ALLOC_COSTLY_ORDER was the suggestion. That is what I meant - to the costly order suggestion - , should have been more explicit. >> One more thing. The original version of this patch included >> a cond_resched() here, that was also removed. From my re-reading >> of the code in page_alloc.c and vmscan.c now, I tend to think >> this is indeed not needed, since any cond_resched()s that might >> be needed to ensure the safety of the code will be properly >> inserted by the reclaim code itself, so there is no need for us >> to include any when we signal that a retry is needed. >> > > For __GFP_WAIT, that sounds like a safe guarantee. > -- 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 prev parent reply other threads:[~2012-06-27 20:50 UTC|newest] Thread overview: 238+ messages / expand[flat|nested] mbox.gz Atom feed top 2012-06-25 14:15 [PATCH 00/11] kmem controller for memcg: stripped down version Glauber Costa 2012-06-25 14:15 ` Glauber Costa 2012-06-25 14:15 ` Glauber Costa 2012-06-25 14:15 ` [PATCH 01/11] memcg: Make it possible to use the stock for more than one page Glauber Costa 2012-06-25 14:15 ` Glauber Costa 2012-06-25 14:15 ` Glauber Costa 2012-06-25 17:44 ` Tejun Heo 2012-06-25 17:44 ` Tejun Heo 2012-06-25 17:44 ` Tejun Heo 2012-06-25 22:29 ` Glauber Costa 2012-06-25 22:29 ` Glauber Costa 2012-06-25 22:33 ` Tejun Heo 2012-06-25 22:33 ` Tejun Heo 2012-06-26 4:01 ` David Rientjes 2012-06-26 4:01 ` David Rientjes 2012-06-25 14:15 ` [PATCH 02/11] memcg: Reclaim when more than one page needed Glauber Costa 2012-06-25 14:15 ` Glauber Costa 2012-06-25 23:33 ` Suleiman Souhlal 2012-06-25 23:33 ` Suleiman Souhlal 2012-06-26 8:39 ` Glauber Costa 2012-06-26 8:39 ` Glauber Costa 2012-06-27 16:16 ` Suleiman Souhlal 2012-06-27 16:16 ` Suleiman Souhlal 2012-06-27 16:16 ` Suleiman Souhlal 2012-06-26 4:09 ` David Rientjes 2012-06-26 4:09 ` David Rientjes 2012-06-26 7:12 ` Glauber Costa 2012-06-26 7:12 ` Glauber Costa 2012-06-26 7:12 ` Glauber Costa 2012-06-26 8:54 ` David Rientjes 2012-06-26 8:54 ` David Rientjes 2012-06-26 8:54 ` David Rientjes 2012-06-26 9:08 ` Glauber Costa 2012-06-26 9:08 ` Glauber Costa 2012-06-26 9:17 ` David Rientjes 2012-06-26 9:17 ` David Rientjes 2012-06-26 9:23 ` Glauber Costa 2012-06-26 9:23 ` Glauber Costa 2012-06-27 10:03 ` Glauber Costa 2012-06-27 10:03 ` Glauber Costa 2012-06-27 19:48 ` David Rientjes 2012-06-27 19:48 ` David Rientjes 2012-06-27 19:48 ` David Rientjes 2012-06-27 20:47 ` Glauber Costa [this message] 2012-06-27 20:47 ` Glauber Costa 2012-06-25 14:15 ` [PATCH 03/11] memcg: change defines to an enum Glauber Costa 2012-06-25 14:15 ` Glauber Costa 2012-06-26 4:11 ` David Rientjes 2012-06-26 4:11 ` David Rientjes 2012-06-26 8:28 ` Glauber Costa 2012-06-26 8:28 ` Glauber Costa 2012-06-26 9:01 ` David Rientjes 2012-06-26 9:01 ` David Rientjes 2012-06-26 9:01 ` David Rientjes 2012-06-25 14:15 ` [PATCH 04/11] kmem slab accounting basic infrastructure Glauber Costa 2012-06-25 14:15 ` Glauber Costa 2012-06-26 4:22 ` David Rientjes 2012-06-26 4:22 ` David Rientjes 2012-06-26 7:09 ` Glauber Costa 2012-06-26 7:09 ` Glauber Costa 2012-06-25 14:15 ` [PATCH 05/11] Add a __GFP_KMEMCG flag Glauber Costa 2012-06-25 14:15 ` Glauber Costa 2012-06-26 4:25 ` David Rientjes 2012-06-26 4:25 ` David Rientjes 2012-06-26 7:08 ` Glauber Costa 2012-06-26 7:08 ` Glauber Costa 2012-06-26 9:03 ` David Rientjes 2012-06-26 9:03 ` David Rientjes 2012-06-25 14:15 ` [PATCH 06/11] memcg: kmem controller infrastructure Glauber Costa 2012-06-25 14:15 ` Glauber Costa 2012-06-25 14:15 ` Glauber Costa 2012-06-25 18:06 ` Tejun Heo 2012-06-25 18:06 ` Tejun Heo 2012-06-25 18:06 ` Tejun Heo 2012-06-25 22:28 ` Glauber Costa 2012-06-25 22:28 ` Glauber Costa 2012-06-25 23:17 ` Andrew Morton 2012-06-25 23:17 ` Andrew Morton 2012-06-25 23:17 ` Andrew Morton 2012-06-26 14:40 ` Glauber Costa 2012-06-26 14:40 ` Glauber Costa 2012-06-26 15:01 ` Glauber Costa 2012-06-26 15:01 ` Glauber Costa 2012-06-26 15:01 ` Glauber Costa 2012-06-26 18:01 ` Andrew Morton 2012-06-26 18:01 ` Andrew Morton 2012-06-26 18:01 ` Andrew Morton 2012-06-26 18:08 ` Tejun Heo 2012-06-26 18:08 ` Tejun Heo 2012-06-26 18:08 ` Tejun Heo 2012-06-26 18:14 ` Glauber Costa 2012-06-26 18:14 ` Glauber Costa 2012-06-26 19:20 ` Andrew Morton 2012-06-26 19:20 ` Andrew Morton 2012-06-26 15:29 ` Glauber Costa 2012-06-26 15:29 ` Glauber Costa 2012-06-26 15:29 ` Glauber Costa 2012-06-26 9:12 ` David Rientjes 2012-06-26 9:12 ` David Rientjes 2012-06-26 9:12 ` David Rientjes 2012-06-26 9:17 ` Glauber Costa 2012-06-26 9:17 ` Glauber Costa 2012-06-26 9:17 ` Glauber Costa 2012-06-27 4:01 ` David Rientjes 2012-06-27 4:01 ` David Rientjes 2012-06-27 9:33 ` Glauber Costa 2012-06-27 9:33 ` Glauber Costa 2012-06-27 9:33 ` Glauber Costa 2012-06-27 19:46 ` David Rientjes 2012-06-27 19:46 ` David Rientjes 2012-06-25 14:15 ` [PATCH 07/11] mm: Allocate kernel pages to the right memcg Glauber Costa 2012-06-25 14:15 ` Glauber Costa 2012-06-25 14:15 ` Glauber Costa 2012-06-25 18:07 ` Tejun Heo 2012-06-25 18:07 ` Tejun Heo 2012-06-25 22:27 ` Glauber Costa 2012-06-25 22:27 ` Glauber Costa 2012-06-25 14:15 ` [PATCH 08/11] memcg: disable kmem code when not in use Glauber Costa 2012-06-25 14:15 ` Glauber Costa 2012-06-25 14:15 ` Glauber Costa 2012-06-26 5:51 ` Kamezawa Hiroyuki 2012-06-26 5:51 ` Kamezawa Hiroyuki 2012-06-25 14:15 ` [PATCH 09/11] memcg: propagate kmem limiting information to children Glauber Costa 2012-06-25 14:15 ` Glauber Costa 2012-06-25 14:15 ` Glauber Costa 2012-06-25 18:29 ` Tejun Heo 2012-06-25 18:29 ` Tejun Heo 2012-06-25 22:36 ` Glauber Costa 2012-06-25 22:36 ` Glauber Costa 2012-06-25 22:36 ` Glauber Costa 2012-06-25 22:49 ` Tejun Heo 2012-06-25 22:49 ` Tejun Heo 2012-06-25 22:49 ` Tejun Heo 2012-06-25 23:21 ` Andrew Morton 2012-06-25 23:21 ` Andrew Morton 2012-06-26 5:23 ` David Rientjes 2012-06-26 5:23 ` David Rientjes 2012-06-25 23:23 ` Andrew Morton 2012-06-25 23:23 ` Andrew Morton 2012-06-26 5:24 ` David Rientjes 2012-06-26 5:24 ` David Rientjes 2012-06-26 5:31 ` Andrew Morton 2012-06-26 5:31 ` Andrew Morton 2012-06-26 5:31 ` Andrew Morton 2012-06-26 7:23 ` Glauber Costa 2012-06-26 7:23 ` Glauber Costa 2012-06-26 7:23 ` Glauber Costa 2012-06-25 14:15 ` [PATCH 10/11] memcg: allow a memcg with kmem charges to be destructed Glauber Costa 2012-06-25 14:15 ` Glauber Costa 2012-06-25 14:15 ` Glauber Costa 2012-06-25 18:34 ` Tejun Heo 2012-06-25 18:34 ` Tejun Heo 2012-06-25 22:25 ` Glauber Costa 2012-06-25 22:25 ` Glauber Costa 2012-06-25 22:25 ` Glauber Costa 2012-06-26 5:59 ` Kamezawa Hiroyuki 2012-06-26 5:59 ` Kamezawa Hiroyuki 2012-06-26 7:21 ` Glauber Costa 2012-06-26 7:21 ` Glauber Costa 2012-06-26 7:21 ` Glauber Costa 2012-06-25 14:15 ` [PATCH 11/11] protect architectures where THREAD_SIZE >= PAGE_SIZE against fork bombs Glauber Costa 2012-06-25 14:15 ` Glauber Costa 2012-06-25 14:15 ` Glauber Costa 2012-06-25 16:55 ` Frederic Weisbecker 2012-06-25 16:55 ` Frederic Weisbecker 2012-06-25 18:38 ` Tejun Heo 2012-06-25 18:38 ` Tejun Heo 2012-06-25 18:38 ` Tejun Heo 2012-06-25 20:57 ` Frederic Weisbecker 2012-06-25 20:57 ` Frederic Weisbecker 2012-06-25 20:57 ` Frederic Weisbecker 2012-06-26 12:48 ` Glauber Costa 2012-06-26 12:48 ` Glauber Costa 2012-06-26 12:48 ` Glauber Costa 2012-06-26 13:38 ` Frederic Weisbecker 2012-06-26 13:38 ` Frederic Weisbecker 2012-06-26 13:38 ` Frederic Weisbecker 2012-06-26 13:37 ` Glauber Costa 2012-06-26 13:37 ` Glauber Costa 2012-06-26 13:37 ` Glauber Costa 2012-06-26 13:44 ` Frederic Weisbecker 2012-06-26 13:44 ` Frederic Weisbecker 2012-06-26 13:44 ` Frederic Weisbecker 2012-06-26 4:57 ` David Rientjes 2012-06-26 4:57 ` David Rientjes 2012-06-26 5:35 ` Kamezawa Hiroyuki 2012-06-26 5:35 ` Kamezawa Hiroyuki 2012-06-26 5:35 ` Kamezawa Hiroyuki 2012-06-26 7:23 ` Glauber Costa 2012-06-26 7:23 ` Glauber Costa 2012-06-26 7:23 ` Glauber Costa 2012-06-26 8:45 ` David Rientjes 2012-06-26 8:45 ` David Rientjes 2012-06-26 8:45 ` David Rientjes 2012-06-26 8:44 ` Glauber Costa 2012-06-26 8:44 ` Glauber Costa 2012-06-26 8:44 ` Glauber Costa 2012-06-26 9:05 ` David Rientjes 2012-06-26 9:05 ` David Rientjes 2012-06-25 23:27 ` [PATCH 00/11] kmem controller for memcg: stripped down version Andrew Morton 2012-06-25 23:27 ` Andrew Morton 2012-06-26 7:17 ` Glauber Costa 2012-06-26 7:17 ` Glauber Costa 2012-06-26 21:55 ` Andrew Morton 2012-06-26 21:55 ` Andrew Morton 2012-06-26 21:55 ` Andrew Morton 2012-06-27 1:08 ` David Rientjes 2012-06-27 1:08 ` David Rientjes 2012-06-27 8:39 ` Glauber Costa 2012-06-27 8:39 ` Glauber Costa 2012-06-27 8:39 ` Glauber Costa 2012-06-27 9:29 ` Fork bomb limitation in memcg WAS: " Glauber Costa 2012-06-27 9:29 ` Glauber Costa 2012-06-27 9:29 ` Glauber Costa 2012-06-27 12:29 ` Frederic Weisbecker 2012-06-27 12:29 ` Frederic Weisbecker 2012-06-27 12:28 ` Glauber Costa 2012-06-27 12:28 ` Glauber Costa 2012-06-27 12:35 ` Frederic Weisbecker 2012-06-27 12:35 ` Frederic Weisbecker 2012-06-27 19:38 ` David Rientjes 2012-06-27 19:38 ` David Rientjes 2012-06-27 19:38 ` David Rientjes 2012-06-28 9:01 ` Glauber Costa 2012-06-28 9:01 ` Glauber Costa 2012-06-28 22:25 ` Andrew Morton 2012-06-28 22:25 ` Andrew Morton 2012-07-03 11:38 ` Glauber Costa 2012-07-03 11:38 ` Glauber Costa 2012-07-03 11:38 ` Glauber Costa 2012-07-12 15:40 ` Frederic Weisbecker 2012-07-12 15:40 ` Frederic Weisbecker 2012-08-07 13:59 ` Glauber Costa 2012-08-07 13:59 ` Glauber Costa 2012-08-07 13:59 ` Glauber Costa 2012-08-08 14:15 ` Glauber Costa 2012-08-08 14:15 ` Glauber Costa 2012-08-08 14:15 ` Glauber Costa
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