From: Johannes Weiner <hannes@cmpxchg.org>
To: Rafael Aquini <aquini@redhat.com>
Cc: Andrew Morton <akpm@linux-foundation.org>,
Andi Kleen <andi@firstfloor.org>,
Andrea Arcangeli <aarcange@redhat.com>,
Bob Liu <bob.liu@oracle.com>,
Christoph Hellwig <hch@infradead.org>,
Dave Chinner <david@fromorbit.com>,
Greg Thelen <gthelen@google.com>, Hugh Dickins <hughd@google.com>,
Jan Kara <jack@suse.cz>,
KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>,
Luigi Semenzato <semenzato@google.com>,
Mel Gorman <mgorman@suse.de>, Metin Doslu <metin@citusdata.com>,
Michel Lespinasse <walken@google.com>,
Minchan Kim <minchan.kim@gmail.com>,
Ozgun Erdogan <ozgun@citusdata.com>,
Peter Zijlstra <peterz@infradead.org>,
Rik van Riel <riel@redhat.com>,
Roman Gushchin <klamm@yandex-team.ru>,
Ryan Mallon <rmallon@gmail.com>, Tejun Heo <tj@kernel.org>,
Vlastimil Babka <vbabka@suse.cz>,
linux-mm@kvack.org, linux-fsdevel@vger.kernel.org,
linux-kernel@vger.kernel.org
Subject: Re: [patch 02/10] fs: cachefiles: use add_to_page_cache_lru()
Date: Sun, 9 Feb 2014 12:34:18 -0500 [thread overview]
Message-ID: <20140209173418.GH4407@cmpxchg.org> (raw)
In-Reply-To: <20140208114334.GA25841@localhost.localdomain>
On Sat, Feb 08, 2014 at 09:43:35AM -0200, Rafael Aquini wrote:
> On Mon, Feb 03, 2014 at 07:53:34PM -0500, Johannes Weiner wrote:
> > This code used to have its own lru cache pagevec up until a0b8cab3
> > ("mm: remove lru parameter from __pagevec_lru_add and remove parts of
> > pagevec API"). Now it's just add_to_page_cache() followed by
> > lru_cache_add(), might as well use add_to_page_cache_lru() directly.
> >
>
> Just a heads-up, here: take a look at https://lkml.org/lkml/2014/2/7/587
Ah, yes. That patch replaced a private pagevec, which consumes the
references you pass in, with add_to_page_cache_lru(), which gets its
own references.
My patch changes
add_to_page_cache()
lru_cache_add()
to
add_to_page_cache_lru()
add_to_page_cache()
lru_cache_add()
so the refcounting does not change for the caller.
Thanks for pointing it out, though, it never hurts to double check
stuff like that.
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next prev parent reply other threads:[~2014-02-09 17:35 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-02-04 0:53 [patch 00/10] mm: thrash detection-based file cache sizing v9 Johannes Weiner
2014-02-04 0:53 ` [patch 01/10] mm: vmstat: fix UP zone state accounting Johannes Weiner
2014-02-05 22:17 ` Andrew Morton
2014-02-04 0:53 ` [patch 02/10] fs: cachefiles: use add_to_page_cache_lru() Johannes Weiner
2014-02-08 11:43 ` Rafael Aquini
2014-02-09 17:34 ` Johannes Weiner [this message]
2014-02-12 10:58 ` Mel Gorman
2014-02-04 0:53 ` [patch 03/10] lib: radix-tree: radix_tree_delete_item() Johannes Weiner
2014-02-12 11:00 ` Mel Gorman
2014-02-04 0:53 ` [patch 04/10] mm: shmem: save one radix tree lookup when truncating swapped pages Johannes Weiner
2014-02-12 11:11 ` Mel Gorman
2014-02-04 0:53 ` [patch 05/10] mm: filemap: move radix tree hole searching here Johannes Weiner
2014-02-12 11:16 ` Mel Gorman
2014-02-04 0:53 ` [patch 06/10] mm + fs: prepare for non-page entries in page cache radix trees Johannes Weiner
2014-02-04 0:53 ` [patch 07/10] mm + fs: store shadow entries in page cache Johannes Weiner
2014-02-04 0:53 ` [patch 08/10] mm: thrash detection-based file cache sizing Johannes Weiner
2014-02-04 0:53 ` [patch 09/10] lib: radix_tree: tree node interface Johannes Weiner
2014-02-04 0:53 ` [patch 10/10] mm: keep page cache radix tree nodes in check Johannes Weiner
2014-02-04 23:07 ` Andrew Morton
2014-02-05 1:53 ` Johannes Weiner
2014-02-04 23:14 ` [patch 00/10] mm: thrash detection-based file cache sizing v9 Andrew Morton
2014-02-05 2:02 ` Johannes Weiner
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