From: Al Viro <viro@ZenIV.linux.org.uk>
To: Jeff Layton <jlayton@poochiereds.net>
Cc: linux-nfs@vger.kernel.org, linux-fsdevel@vger.kernel.org,
Trond Myklebust <trond.myklebust@primarydata.com>,
Linus Torvalds <torvalds@linux-foundation.org>,
Anna Schumaker <Anna.Schumaker@netapp.com>
Subject: Re: parallel lookups on NFS
Date: Sun, 1 May 2016 02:08:43 +0100 [thread overview]
Message-ID: <20160501010843.GI25498@ZenIV.linux.org.uk> (raw)
In-Reply-To: <20160501001816.GH25498@ZenIV.linux.org.uk>
On Sun, May 01, 2016 at 01:18:16AM +0100, Al Viro wrote:
> On Sun, May 01, 2016 at 01:02:55AM +0100, Al Viro wrote:
> > I wonder if we ought to put a counter into nfs_cache_array, initialized to 1
> > (in nfs_readdir_xdr_to_array()), bumped in get_cache_page() and decremented
> > both in cache_page_release() and in ->freepage(). With actual freeing
> > of names happening only when the sucker reaches 0, and get_cache_page()
> > treating "oops, it's already 0, someone has just evicted it from page cache"
> > as "page_cache_release() and retry". Objections?
>
> Something like (completely untested)
No problems after 100 iterations... Folded and pushed.
next prev parent reply other threads:[~2016-05-01 1:08 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-04-24 2:34 parallel lookups on NFS Al Viro
2016-04-24 12:46 ` Jeff Layton
2016-04-24 19:18 ` Al Viro
2016-04-24 19:18 ` Al Viro
2016-04-24 20:51 ` Jeff Layton
2016-04-29 7:58 ` Al Viro
2016-04-30 13:15 ` Jeff Layton
2016-04-30 13:15 ` Jeff Layton
2016-04-30 13:22 ` Jeff Layton
2016-04-30 14:22 ` Al Viro
2016-04-30 14:22 ` Al Viro
2016-04-30 14:43 ` Jeff Layton
2016-04-30 18:58 ` Al Viro
2016-04-30 18:58 ` Al Viro
2016-04-30 19:29 ` Al Viro
[not found] ` <1462048765.10011.44.camel@poochiereds.net>
2016-04-30 20:57 ` Al Viro
2016-04-30 22:17 ` Jeff Layton
2016-04-30 22:33 ` Jeff Layton
2016-04-30 23:31 ` Al Viro
2016-05-01 0:02 ` Al Viro
2016-05-01 0:18 ` Al Viro
2016-05-01 1:08 ` Al Viro [this message]
2016-05-01 13:35 ` Jeff Layton
2016-04-30 23:23 ` Jeff Layton
2016-04-30 23:29 ` Jeff Layton
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