From: Peter Zijlstra <peterz@infradead.org>
To: Johannes Weiner <hannes@cmpxchg.org>
Cc: linux-mm@kvack.org, Andi Kleen <andi@firstfloor.org>,
Andrea Arcangeli <aarcange@redhat.com>,
Andrew Morton <akpm@linux-foundation.org>,
Greg Thelen <gthelen@google.com>,
Christoph Hellwig <hch@infradead.org>,
Hugh Dickins <hughd@google.com>, Jan Kara <jack@suse.cz>,
KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>,
Mel Gorman <mgorman@suse.de>, Minchan Kim <minchan.kim@gmail.com>,
Rik van Riel <riel@redhat.com>,
Michel Lespinasse <walken@google.com>,
Seth Jennings <sjenning@linux.vnet.ibm.com>,
Roman Gushchin <klamm@yandex-team.ru>, metin d <metdos@yahoo.com>,
linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org
Subject: Re: [patch 10/10] mm: workingset: keep shadow entries in check
Date: Mon, 3 Jun 2013 10:22:09 +0200 [thread overview]
Message-ID: <20130603082209.GG5910@twins.programming.kicks-ass.net> (raw)
In-Reply-To: <1369937046-27666-11-git-send-email-hannes@cmpxchg.org>
On Thu, May 30, 2013 at 02:04:06PM -0400, Johannes Weiner wrote:
> 2. a list of files that contain shadow entries is maintained. If the
> global number of shadows exceeds a certain threshold, a shrinker is
> activated that reclaims old entries from the mappings. This is
> heavy-handed but it should not be a common case and is only there
> to protect from accidentally/maliciously induced OOM kills.
Grrr.. another global files list. We've been trying rather hard to get
rid of the first one :/
I see why you want it but ugh.
I have similar worries for your global time counter, large machines
might thrash on that one cacheline.
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WARNING: multiple messages have this Message-ID (diff)
From: Peter Zijlstra <peterz@infradead.org>
To: Johannes Weiner <hannes@cmpxchg.org>
Cc: linux-mm@kvack.org, Andi Kleen <andi@firstfloor.org>,
Andrea Arcangeli <aarcange@redhat.com>,
Andrew Morton <akpm@linux-foundation.org>,
Greg Thelen <gthelen@google.com>,
Christoph Hellwig <hch@infradead.org>,
Hugh Dickins <hughd@google.com>, Jan Kara <jack@suse.cz>,
KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>,
Mel Gorman <mgorman@suse.de>, Minchan Kim <minchan.kim@gmail.com>,
Rik van Riel <riel@redhat.com>,
Michel Lespinasse <walken@google.com>,
Seth Jennings <sjenning@linux.vnet.ibm.com>,
Roman Gushchin <klamm@yandex-team.ru>, metin d <metdos@yahoo.com>,
linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org
Subject: Re: [patch 10/10] mm: workingset: keep shadow entries in check
Date: Mon, 3 Jun 2013 10:22:09 +0200 [thread overview]
Message-ID: <20130603082209.GG5910@twins.programming.kicks-ass.net> (raw)
In-Reply-To: <1369937046-27666-11-git-send-email-hannes@cmpxchg.org>
On Thu, May 30, 2013 at 02:04:06PM -0400, Johannes Weiner wrote:
> 2. a list of files that contain shadow entries is maintained. If the
> global number of shadows exceeds a certain threshold, a shrinker is
> activated that reclaims old entries from the mappings. This is
> heavy-handed but it should not be a common case and is only there
> to protect from accidentally/maliciously induced OOM kills.
Grrr.. another global files list. We've been trying rather hard to get
rid of the first one :/
I see why you want it but ugh.
I have similar worries for your global time counter, large machines
might thrash on that one cacheline.
next prev parent reply other threads:[~2013-06-03 8:22 UTC|newest]
Thread overview: 44+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-05-30 18:03 [patch 00/10] mm: thrash detection-based file cache sizing Johannes Weiner
2013-05-30 18:03 ` Johannes Weiner
2013-05-30 18:03 ` [patch 01/10] mm: page_alloc: zone round-robin allocator Johannes Weiner
2013-05-30 18:03 ` Johannes Weiner
2013-05-30 18:03 ` [patch 02/10] lib: radix-tree: radix_tree_delete_item() Johannes Weiner
2013-05-30 18:03 ` Johannes Weiner
2013-05-30 18:03 ` [patch 03/10] mm: shmem: save one radix tree lookup when truncating swapped pages Johannes Weiner
2013-05-30 18:03 ` Johannes Weiner
2013-05-30 18:04 ` [patch 04/10] mm: filemap: move radix tree hole searching here Johannes Weiner
2013-05-30 18:04 ` Johannes Weiner
2013-05-30 18:04 ` [patch 05/10] mm + fs: prepare for non-page entries in page cache radix trees Johannes Weiner
2013-05-30 18:04 ` Johannes Weiner
2013-05-30 18:04 ` [patch 06/10] mm + fs: store shadow entries in page cache Johannes Weiner
2013-05-30 18:04 ` Johannes Weiner
2013-05-30 18:04 ` [patch 07/10] mm + fs: provide refault distance to page cache allocations Johannes Weiner
2013-05-30 18:04 ` Johannes Weiner
2013-05-30 18:04 ` [patch 08/10] mm: make global_dirtyable_memory() available to other mm code Johannes Weiner
2013-05-30 18:04 ` Johannes Weiner
2013-05-30 18:04 ` [patch 09/10] mm: thrash detection-based file cache sizing Johannes Weiner
2013-05-30 18:04 ` Johannes Weiner
2013-06-07 14:16 ` Roman Gushchin
2013-06-07 14:16 ` Roman Gushchin
2013-06-07 17:36 ` Johannes Weiner
2013-06-07 17:36 ` Johannes Weiner
2013-05-30 18:04 ` [patch 10/10] mm: workingset: keep shadow entries in check Johannes Weiner
2013-05-30 18:04 ` Johannes Weiner
2013-06-03 8:22 ` Peter Zijlstra [this message]
2013-06-03 8:22 ` Peter Zijlstra
2013-06-03 15:01 ` Johannes Weiner
2013-06-03 15:01 ` Johannes Weiner
2013-06-03 17:10 ` Peter Zijlstra
2013-06-03 17:10 ` Peter Zijlstra
2013-06-06 18:31 ` Johannes Weiner
2013-06-06 18:31 ` Johannes Weiner
2013-06-03 8:25 ` Peter Zijlstra
2013-06-03 8:25 ` Peter Zijlstra
2013-06-03 15:20 ` Johannes Weiner
2013-06-03 15:20 ` Johannes Weiner
2013-06-03 17:15 ` Peter Zijlstra
2013-06-03 17:15 ` Peter Zijlstra
2013-06-03 18:12 ` Johannes Weiner
2013-06-03 18:12 ` Johannes Weiner
2013-06-03 18:52 ` Peter Zijlstra
2013-06-03 18:52 ` Peter Zijlstra
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