From: Arun Sharma <asharma@fb.com>
To: Minchan Kim <minchan@kernel.org>
Cc: Andrew Morton <akpm@linux-foundation.org>,
linux-kernel@vger.kernel.org, linux-mm@kvack.org,
Michael Kerrisk <mtk.manpages@gmail.com>,
sanjay@google.com, Paul Turner <pjt@google.com>,
David Rientjes <rientjes@google.com>,
John Stultz <john.stultz@linaro.org>,
Christoph Lameter <cl@linux.com>,
Android Kernel Team <kernel-team@android.com>,
Robert Love <rlove@google.com>, Mel Gorman <mel@csn.ul.ie>,
Hugh Dickins <hughd@google.com>,
Dave Hansen <dave@linux.vnet.ibm.com>,
Rik van Riel <riel@redhat.com>,
Dave Chinner <david@fromorbit.com>, Neil Brown <neilb@suse.de>,
Mike Hommey <mh@glandium.org>, Taras Glek <tglek@mozilla.com>,
KOSAKI Motohiro <kosaki.motohiro@gmail.com>,
KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Subject: Re: [RFC v4 0/3] Support volatile for anonymous range
Date: Tue, 18 Dec 2012 10:27:46 -0800 [thread overview]
Message-ID: <50D0B5A2.2010707@fb.com> (raw)
In-Reply-To: <1355813274-571-1-git-send-email-minchan@kernel.org>
On 12/17/12 10:47 PM, Minchan Kim wrote:
> I hope more inputs from user-space allocator people and test patch
> with their allocator because it might need design change of arena
> management for getting real vaule.
jemalloc knows how to handle MADV_FREE on platforms that support it.
This looks similar (we'll need a SIGBUS handler that does the right
thing = zero the page + mark it as non-volatile in the common case).
All of this of course assumes that apps madvise the kernel through APIs
exposed by the malloc implementation - not via a raw syscall.
In other words, some new user space code needs to be written to test
this out fully. Sounds feasible though.
-Arun
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next prev parent reply other threads:[~2012-12-18 18:28 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-12-18 6:47 [RFC v4 0/3] Support volatile for anonymous range Minchan Kim
2012-12-18 6:47 ` [RFC v4 1/3] Introduce new system call mvolatile Minchan Kim
2012-12-18 6:47 ` [RFC v4 2/3] Discard volatile page Minchan Kim
2012-12-18 6:47 ` [RFC v4 3/3] add PGVOLATILE vmstat count Minchan Kim
2012-12-18 18:27 ` Arun Sharma [this message]
2012-12-20 1:34 ` [RFC v4 0/3] Support volatile for anonymous range Minchan Kim
2012-12-26 2:37 ` Kamezawa Hiroyuki
2012-12-26 3:46 ` Minchan Kim
2012-12-28 0:24 ` Kamezawa Hiroyuki
2013-01-04 2:37 ` Minchan Kim
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