From: David Howells <dhowells@redhat.com>
To: NeilBrown <neilb@suse.de>
Cc: dhowells@redhat.com, Chris Mason <clm@fb.com>,
Al Viro <viro@ZenIV.linux.org.uk>, Josef Bacik <jbacik@fb.com>,
David Sterba <dsterba@suse.cz>,
linux-cachefs@vger.kernel.org, Dave Chinner <david@fromorbit.com>,
linux-kernel@vger.kernel.org,
Christoph Hellwig <hch@infradead.org>,
linux-fsdevel@vger.kernel.org, linux-btrfs@vger.kernel.org
Subject: Re: [PATCH 2/3] fscache/cachefiles: optionally use SEEK_DATA instead of ->bmap.
Date: Mon, 20 Apr 2015 12:21:42 +0100 [thread overview]
Message-ID: <3914.1429528902@warthog.procyon.org.uk> (raw)
In-Reply-To: <20150420052752.26554.52672.stgit@notabene.brown>
NeilBrown <neilb@suse.de> wrote:
> @@ -721,24 +733,45 @@ int cachefiles_read_or_alloc_pages(struct fscache_retrieval *op,
We can actually do better than this what you've done here for
cachefiles_read_or_alloc_pages(). We can use SEEK_DATA to check the beginning
of a run of pages and then SEEK_HOLE to see how many pages are covered.
David
next prev parent reply other threads:[~2015-04-20 11:22 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-04-20 5:27 [PATCH 0/3] Allow fscache to work on BTRFS NeilBrown
2015-04-20 5:27 ` [PATCH 1/3] cachefiles: perform test on s_blocksize when opening cache file NeilBrown
2015-04-20 5:27 ` [PATCH 2/3] fscache/cachefiles: optionally use SEEK_DATA instead of ->bmap NeilBrown
2015-04-20 6:08 ` Christoph Hellwig
2015-04-20 6:27 ` NeilBrown
2015-04-20 9:45 ` Christoph Hellwig
2015-04-21 23:06 ` NeilBrown
2015-04-20 5:27 ` [PATCH 3/3] btrfs: set FS_SUPPORTS_SEEK_HOLE flag NeilBrown
2015-04-20 19:48 ` Chris Mason
2015-04-20 8:47 ` David Howells
2015-04-20 9:33 ` NeilBrown
2015-04-20 9:46 ` David Howells
2015-04-20 9:48 ` Christoph Hellwig
2015-04-20 12:58 ` Al Viro
2015-04-21 8:43 ` Christoph Hellwig
2015-04-21 10:23 ` Hugh Dickins
2015-04-27 5:41 ` NeilBrown
2015-04-27 13:43 ` Christoph Hellwig
2015-04-20 11:21 ` David Howells [this message]
2015-04-20 15:59 ` [RFC][PATCH] cachefiles: Make better use of SEEK_DATA/SEEK_HOLE David Howells
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