From: Daniel Micay <danielmicay-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
To: Johannes Weiner <hannes-druUgvl0LCNAfugRpC6u6w@public.gmane.org>
Cc: Minchan Kim <minchan-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>,
Andrew Morton
<akpm-de/tnXTf+JLsfHDXvbKv3WD2FQJk+8+b@public.gmane.org>,
linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
linux-mm-Bw31MaZKKs3YtjvyW6yDsg@public.gmane.org,
Michael Kerrisk
<mtk.manpages-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>,
linux-api-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
Hugh Dickins <hughd-hpIqsD4AKlfQT0dZR+AlfA@public.gmane.org>,
zhangyanfei-BthXqXjhjHXQFUHtdCDX3A@public.gmane.org,
Rik van Riel <riel-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>,
Mel Gorman <mgorman-l3A5Bk7waGM@public.gmane.org>,
KOSAKI Motohiro
<kosaki.motohiro-+CUm20s59erQFUHtdCDX3A@public.gmane.org>,
Jason Evans <je-b10kYP2dOMg@public.gmane.org>,
"Kirill A. Shutemov"
<kirill-oKw7cIdHH8eLwutG50LtGA@public.gmane.org>,
Michal Hocko <mhocko-AlSwsSmVLrQ@public.gmane.org>,
yalin.wang2010-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org,
Shaohua Li <shli-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>,
"Wang,
Yalin" <Yalin.Wang-/MT0OVThwyLZJqsBc5GL+g@public.gmane.org>
Subject: Re: [PATCH 5/8] mm: move lazily freed pages to inactive list
Date: Wed, 4 Nov 2015 18:49:54 -0500 [thread overview]
Message-ID: <563A99A2.6010708@gmail.com> (raw)
In-Reply-To: <563A9681.3070102-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
[-- Attachment #1: Type: text/plain, Size: 747 bytes --]
> From a user perspective, it doesn't depend on swap. It's just slower
> without swap because it does what MADV_DONTNEED does. The current
> implementation can be dropped in where MADV_DONTNEED was previously used.
It just wouldn't replace existing layers of purging logic until that
edge case is fixed and it gains better THP integration.
It's already a very useful API with significant performance wins over
MADV_DONTNEED, so it will be useful. The only risk involved in landing
it is that a better feature might come along. Worst case scenario being
that the kernel ends up with a synonym for MADV_DONTNEED (but I think
there will still be a use case for this even if a pinning/unpinning API
existed, as this is more precise).
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next prev parent reply other threads:[~2015-11-04 23:49 UTC|newest]
Thread overview: 38+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-10-30 7:01 [PATCH 0/8] MADV_FREE support Minchan Kim
2015-10-30 7:01 ` [PATCH 1/8] mm: support madvise(MADV_FREE) Minchan Kim
2015-10-30 16:49 ` Shaohua Li
[not found] ` <20151030164937.GA44946-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
2015-11-03 0:10 ` Minchan Kim
2015-10-30 7:01 ` [PATCH 2/8] mm: define MADV_FREE for some arches Minchan Kim
2015-10-30 7:01 ` [PATCH 3/8] arch: uapi: asm: mman.h: Let MADV_FREE have same value for all architectures Minchan Kim
[not found] ` <1446188504-28023-4-git-send-email-minchan-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
2015-11-02 0:08 ` Hugh Dickins
2015-11-03 2:32 ` Minchan Kim
2015-11-03 2:36 ` Minchan Kim
2015-11-03 3:36 ` David Miller
2015-11-03 4:31 ` Minchan Kim
2015-10-30 7:01 ` [PATCH 4/8] mm: free swp_entry in madvise_free Minchan Kim
2015-10-30 12:28 ` Michal Hocko
[not found] ` <20151030122814.GA23627-2MMpYkNvuYDjFM9bn6wA6Q@public.gmane.org>
2015-11-03 0:53 ` Minchan Kim
2015-10-30 7:01 ` [PATCH 5/8] mm: move lazily freed pages to inactive list Minchan Kim
[not found] ` <1446188504-28023-6-git-send-email-minchan-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
2015-10-30 17:22 ` Shaohua Li
[not found] ` <20151030172212.GB44946-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
2015-11-03 0:52 ` Minchan Kim
2015-11-04 8:15 ` Michal Hocko
2015-11-04 17:53 ` Shaohua Li
2015-11-04 18:20 ` Shaohua Li
2015-11-05 1:11 ` Minchan Kim
[not found] ` <20151104175342.GA98327-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
2015-11-05 1:03 ` Minchan Kim
2015-11-04 20:55 ` Johannes Weiner
[not found] ` <20151104205504.GA9927-druUgvl0LCNAfugRpC6u6w@public.gmane.org>
2015-11-04 21:48 ` Daniel Micay
[not found] ` <563A7D21.6040505-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2015-11-04 22:55 ` Johannes Weiner
2015-11-04 23:36 ` Daniel Micay
[not found] ` <563A9681.3070102-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2015-11-04 23:49 ` Daniel Micay [this message]
2015-10-30 7:01 ` [PATCH 6/8] mm: lru_deactivate_fn should clear PG_referenced Minchan Kim
[not found] ` <1446188504-28023-7-git-send-email-minchan-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
2015-10-30 12:47 ` Michal Hocko
2015-11-03 1:10 ` Minchan Kim
2015-11-04 8:22 ` Michal Hocko
2015-10-30 7:01 ` [PATCH 7/8] mm: clear PG_dirty to mark page freeable Minchan Kim
[not found] ` <1446188504-28023-8-git-send-email-minchan-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
2015-10-30 12:55 ` Michal Hocko
2015-10-30 7:01 ` [PATCH 8/8] mm: mark stable page dirty in KSM Minchan Kim
[not found] ` <1446188504-28023-1-git-send-email-minchan-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
2015-11-01 4:51 ` [PATCH 0/8] MADV_FREE support David Rientjes
2015-11-01 6:29 ` Daniel Micay
[not found] ` <5635B159.8030307-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2015-11-03 2:23 ` Minchan Kim
2015-11-04 20:19 ` David Rientjes
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