From: Dave Hansen <dave@linux.vnet.ibm.com>
To: Minchan Kim <minchan@kernel.org>
Cc: Andrew Morton <akpm@linux-foundation.org>,
linux-mm@kvack.org, linux-kernel@vger.kernel.org,
Rik van Riel <riel@redhat.com>, Hugh Dickins <hughd@google.com>,
Andrea Arcangeli <aarcange@redhat.com>
Subject: Re: [RFC 2/8] Don't allow volatile attribute on THP and KSM
Date: Thu, 03 Jan 2013 08:27:31 -0800 [thread overview]
Message-ID: <50E5B173.7070807@linux.vnet.ibm.com> (raw)
In-Reply-To: <1357187286-18759-3-git-send-email-minchan@kernel.org>
On 01/02/2013 08:28 PM, Minchan Kim wrote:
> VOLATILE imply the the pages in the range isn't working set any more
> so it's pointless that make them to THP/KSM.
One of the points of this implementation is that it be able to preserve
memory contents when there is no pressure. If those contents happen to
contain a THP/KSM page, and there's no pressure, it seems like the right
thing to do is to leave that memory in place.
It might be a fair thing to do this in order to keep the implementation
more sane at the moment. But, we should make sure there's some good
text on that in the changelog.
next prev parent reply other threads:[~2013-01-03 16:28 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-01-03 4:27 [RFC v5 0/8] Support volatile for anonymous range Minchan Kim
2013-01-03 4:27 ` [RFC 1/8] Introduce new system call mvolatile Minchan Kim
2013-01-03 18:35 ` Taras Glek
2013-01-04 4:25 ` Minchan Kim
2013-01-17 1:48 ` John Stultz
2013-01-18 5:30 ` Minchan Kim
2013-01-03 4:28 ` [RFC 2/8] Don't allow volatile attribute on THP and KSM Minchan Kim
2013-01-03 16:27 ` Dave Hansen [this message]
2013-01-04 2:51 ` Minchan Kim
2013-01-03 4:28 ` [RFC 3/8] bail out when the page is in VOLATILE vma Minchan Kim
2013-01-03 4:28 ` [RFC 4/8] add page_locked parameter in free_swap_and_cache Minchan Kim
2013-01-03 4:28 ` [RFC 5/8] Discard volatile page Minchan Kim
2013-01-03 4:28 ` [RFC 6/8] add PGVOLATILE vmstat count Minchan Kim
2013-01-03 4:28 ` [RFC 7/8] add volatile page discard hook to kswapd Minchan Kim
2013-01-03 4:28 ` [RFC 8/8] extend PGVOLATILE vmstat " Minchan Kim
2013-01-03 17:19 ` [RFC v5 0/8] Support volatile for anonymous range Sanjay Ghemawat
2013-01-04 5:15 ` Minchan Kim
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