From: Christoph Lameter <clameter@sgi.com>
To: Andrew Morton <akpm@linux-foundation.org>
Cc: Andrea Arcangeli <andrea@suse.de>,
linux-mm@kvack.org, David Rientjes <rientjes@google.com>,
Paul Jackson <pj@sgi.com>
Subject: Re: [PATCH 21 of 24] select process to kill for cpusets
Date: Wed, 12 Sep 2007 17:59:31 -0700 (PDT) [thread overview]
Message-ID: <Pine.LNX.4.64.0709121757390.4489@schroedinger.engr.sgi.com> (raw)
In-Reply-To: <20070912060558.5822cb56.akpm@linux-foundation.org>
On Wed, 12 Sep 2007, Andrew Morton wrote:
> > + * nothing and allow other cpusets to continue.
> > + */
> > + if (constraint == CONSTRAINT_CPUSET)
> > + goto out;
> > read_unlock(&tasklist_lock);
> > cpuset_unlock();
> > panic("Out of memory and no killable processes...\n");
>
> Seems sensible, but it would be nice to get some thought cycles from pj &
> Christoph, please.
The reason that we do not scan the tasklist but kill the current process
is also that scanning the tasklist on large systems is very expensive.
Concurrent OOM killer may hold up the system for a long time. So we need
the kill without going throught the tasklist.
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next prev parent reply other threads:[~2007-09-13 0:59 UTC|newest]
Thread overview: 113+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-08-22 12:48 [PATCH 00 of 24] OOM related fixes Andrea Arcangeli
2007-08-22 12:48 ` [PATCH 01 of 24] remove nr_scan_inactive/active Andrea Arcangeli
2007-09-12 11:44 ` Andrew Morton
2008-01-02 17:50 ` Andrea Arcangeli
2007-08-22 12:48 ` [PATCH 02 of 24] avoid oom deadlock in nfs_create_request Andrea Arcangeli
2007-09-12 23:54 ` Christoph Lameter
2007-08-22 12:48 ` [PATCH 03 of 24] prevent oom deadlocks during read/write operations Andrea Arcangeli
2007-09-12 11:56 ` Andrew Morton
2007-09-12 2:18 ` Nick Piggin
2008-01-03 0:53 ` Andrea Arcangeli
2007-08-22 12:48 ` [PATCH 04 of 24] serialize oom killer Andrea Arcangeli
2007-09-12 12:02 ` Andrew Morton
2007-09-12 12:04 ` Andrew Morton
2007-09-12 12:11 ` Andrea Arcangeli
2008-01-03 0:55 ` Andrea Arcangeli
2007-09-13 0:09 ` Christoph Lameter
2007-09-13 18:32 ` David Rientjes
2007-09-13 18:37 ` Christoph Lameter
2007-09-13 18:46 ` David Rientjes
2007-09-13 18:53 ` Christoph Lameter
2007-09-14 0:36 ` David Rientjes
2007-09-14 2:31 ` Christoph Lameter
2007-09-14 3:33 ` David Rientjes
2007-09-18 16:44 ` David Rientjes
2007-09-18 16:44 ` [patch 1/4] oom: move prototypes to appropriate header file David Rientjes
2007-09-18 16:44 ` [patch 2/4] oom: move constraints to enum David Rientjes
2007-09-18 16:44 ` [patch 3/4] oom: save zonelist pointer for oom killer calls David Rientjes
2007-09-18 16:44 ` [patch 4/4] oom: serialize out of memory calls David Rientjes
2007-09-18 19:54 ` Christoph Lameter
2007-09-18 19:56 ` David Rientjes
2007-09-18 20:01 ` Christoph Lameter
2007-09-18 20:06 ` David Rientjes
2007-09-18 20:23 ` [patch 5/4] oom: rename serialization helper functions David Rientjes
2007-09-18 20:26 ` Christoph Lameter
2007-09-18 20:39 ` [patch 5/4 v2] " David Rientjes
2007-09-18 20:59 ` Christoph Lameter
2007-09-18 19:57 ` [patch 3/4] oom: save zonelist pointer for oom killer calls Christoph Lameter
2007-09-18 20:13 ` David Rientjes
2007-09-18 20:16 ` Christoph Lameter
2007-09-18 20:47 ` [patch 6/4] oom: pass null to kfree if zonelist is not cleared David Rientjes
2007-09-18 21:01 ` Christoph Lameter
2007-09-18 21:13 ` David Rientjes
2007-09-18 21:25 ` Christoph Lameter
2007-09-18 22:16 ` David Rientjes
2007-09-19 17:09 ` Paul Jackson
2007-09-19 18:21 ` David Rientjes
2007-09-18 19:55 ` [patch 2/4] oom: move constraints to enum Christoph Lameter
2007-08-22 12:48 ` [PATCH 05 of 24] avoid selecting already killed tasks Andrea Arcangeli
2007-09-13 0:13 ` Christoph Lameter
2007-08-22 12:48 ` [PATCH 06 of 24] reduce the probability of an OOM livelock Andrea Arcangeli
2007-09-12 12:17 ` Andrew Morton
2008-01-03 1:03 ` Andrea Arcangeli
2007-08-22 12:48 ` [PATCH 07 of 24] balance_pgdat doesn't return the number of pages freed Andrea Arcangeli
2007-09-12 12:18 ` Andrew Morton
2007-09-13 0:26 ` Christoph Lameter
2007-08-22 12:48 ` [PATCH 08 of 24] don't depend on PF_EXITING tasks to go away Andrea Arcangeli
2007-09-12 12:20 ` Andrew Morton
2008-01-03 0:56 ` Andrea Arcangeli
2007-08-22 12:48 ` [PATCH 09 of 24] fallback killing more tasks if tif-memdie doesn't " Andrea Arcangeli
2007-09-12 12:30 ` Andrew Morton
2007-09-12 12:34 ` Andrew Morton
2008-01-03 1:06 ` Andrea Arcangeli
2007-08-22 12:48 ` [PATCH 10 of 24] stop useless vm trashing while we wait the TIF_MEMDIE task to exit Andrea Arcangeli
2007-09-12 12:42 ` Andrew Morton
2007-09-13 0:36 ` Christoph Lameter
2007-09-21 19:10 ` David Rientjes
2008-01-03 1:08 ` Andrea Arcangeli
2007-08-22 12:48 ` [PATCH 11 of 24] the oom schedule timeout isn't needed with the VM_is_OOM logic Andrea Arcangeli
2007-09-12 12:44 ` Andrew Morton
2007-08-22 12:48 ` [PATCH 12 of 24] show mem information only when a task is actually being killed Andrea Arcangeli
2007-09-12 12:49 ` Andrew Morton
2007-08-22 12:49 ` [PATCH 13 of 24] simplify oom heuristics Andrea Arcangeli
2007-09-12 12:52 ` Andrew Morton
2007-09-12 13:40 ` Andrea Arcangeli
2007-09-12 20:52 ` Andrew Morton
2007-08-22 12:49 ` [PATCH 14 of 24] oom select should only take rss into account Andrea Arcangeli
2007-09-13 0:43 ` Christoph Lameter
2007-08-22 12:49 ` [PATCH 15 of 24] limit reclaim if enough pages have been freed Andrea Arcangeli
2007-09-12 12:57 ` Andrew Morton
2008-01-03 1:12 ` Andrea Arcangeli
2007-09-12 12:58 ` Andrew Morton
2007-09-12 13:38 ` Andrea Arcangeli
2007-08-22 12:49 ` [PATCH 16 of 24] avoid some lock operation in vm fast path Andrea Arcangeli
2007-09-12 12:59 ` Andrew Morton
2007-09-13 0:49 ` Christoph Lameter
2007-09-13 1:16 ` Andrew Morton
2007-09-13 1:33 ` Christoph Lameter
2007-09-13 1:41 ` KAMEZAWA Hiroyuki
2007-09-13 1:44 ` Andrew Morton
2007-08-22 12:49 ` [PATCH 17 of 24] apply the anti deadlock features only to global oom Andrea Arcangeli
2007-09-12 13:02 ` Andrew Morton
2007-09-13 0:53 ` Christoph Lameter
2007-09-13 0:52 ` Christoph Lameter
2007-08-22 12:49 ` [PATCH 18 of 24] run panic the same way in both places Andrea Arcangeli
2007-09-13 0:54 ` Christoph Lameter
2007-08-22 12:49 ` [PATCH 19 of 24] cacheline align VM_is_OOM to prevent false sharing Andrea Arcangeli
2007-09-12 13:02 ` Andrew Morton
2007-09-12 13:36 ` Andrea Arcangeli
2007-09-13 0:55 ` Christoph Lameter
2007-08-22 12:49 ` [PATCH 20 of 24] extract deadlock helper function Andrea Arcangeli
2007-08-22 12:49 ` [PATCH 21 of 24] select process to kill for cpusets Andrea Arcangeli
2007-09-12 13:05 ` Andrew Morton
2007-09-13 0:59 ` Christoph Lameter [this message]
2007-09-13 5:13 ` David Rientjes
2007-09-13 17:55 ` Christoph Lameter
2007-08-22 12:49 ` [PATCH 22 of 24] extract select helper function Andrea Arcangeli
2007-08-22 12:49 ` [PATCH 23 of 24] serialize for cpusets Andrea Arcangeli
2007-09-12 13:10 ` Andrew Morton
2007-09-12 13:34 ` Andrea Arcangeli
2007-09-12 19:08 ` David Rientjes
2007-09-13 1:02 ` Christoph Lameter
2007-08-22 12:49 ` [PATCH 24 of 24] add oom_kill_asking_task flag Andrea Arcangeli
2007-09-12 13:11 ` Andrew Morton
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