From: Christoph Hellwig <hch@infradead.org>
To: Benjamin LaHaise <bcrl@kvack.org>
Cc: Milosz Tanski <milosz@adfin.com>,
linux-kernel@vger.kernel.org,
Christoph Hellwig <hch@infradead.org>,
linux-fsdevel@vger.kernel.org, linux-aio@kvack.org,
Mel Gorman <mgorman@suse.de>,
Volker Lendecke <Volker.Lendecke@sernet.de>,
Tejun Heo <tj@kernel.org>, Jeff Moyer <jmoyer@redhat.com>,
Andreas Dilger <adilger@dilger.ca>
Subject: Re: [RFC 1/2] aio: async readahead
Date: Fri, 19 Sep 2014 04:26:12 -0700 [thread overview]
Message-ID: <20140919112612.GC4639@infradead.org> (raw)
In-Reply-To: <20140917144925.GU24821@kvack.org>
Requiring the block mappings to be entirely async is why we never went
for full buffered aio. What would seem more useful is to offload all
readahead to workqueues to make sure they never block the caller for
sys_readahead or if we decide to readahead for the nonblocking read.
I tried to implement this, but I couldn't find a good place to hang
the work_struct for it off. If we decide to dynamically allocate
the ra structure separate from struct file that might be an obvious
place.
next prev parent reply other threads:[~2014-09-19 11:26 UTC|newest]
Thread overview: 86+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-09-15 20:20 [RFC PATCH 0/7] Non-blockling buffered fs read (page cache only) Milosz Tanski
2014-09-15 20:20 ` [PATCH 1/7] Prepare for adding a new readv/writev with user flags Milosz Tanski
2014-09-15 20:28 ` Al Viro
2014-09-15 21:15 ` Christoph Hellwig
2014-09-15 21:44 ` Milosz Tanski
2014-09-15 20:20 ` [PATCH 2/7] Define new syscalls readv2,preadv2,writev2,pwritev2 Milosz Tanski
2014-09-16 19:20 ` Jeff Moyer
2014-09-16 19:54 ` Milosz Tanski
2014-09-16 21:03 ` Christoph Hellwig
2014-09-17 15:43 ` Theodore Ts'o
2014-09-17 16:05 ` Milosz Tanski
2014-09-17 16:59 ` Theodore Ts'o
2014-09-17 17:24 ` Zach Brown
2014-09-15 20:20 ` [PATCH 3/7] Export new vector IO (with flags) to userland Milosz Tanski
2014-09-15 20:21 ` [PATCH 4/7] O_NONBLOCK flag for readv2/preadv2 Milosz Tanski
2014-09-16 19:19 ` Jeff Moyer
2014-09-16 19:44 ` Milosz Tanski
2014-09-16 19:53 ` Jeff Moyer
2014-09-15 20:21 ` [PATCH 5/7] documentation updates Christoph Hellwig
2014-09-15 20:21 ` [PATCH 6/7] move flags enforcement to vfs_preadv/vfs_pwritev Christoph Hellwig
2014-09-15 21:15 ` Christoph Hellwig
2014-09-15 21:45 ` Milosz Tanski
2014-09-15 20:22 ` [PATCH 7/7] check for O_NONBLOCK in all read_iter instances Christoph Hellwig
2014-09-16 19:27 ` Jeff Moyer
2014-09-16 19:45 ` Milosz Tanski
2014-09-16 21:42 ` Dave Chinner
2014-09-17 12:24 ` Benjamin LaHaise
2014-09-17 13:47 ` Theodore Ts'o
2014-09-17 13:56 ` Benjamin LaHaise
2014-09-17 15:33 ` Milosz Tanski
2014-09-17 15:49 ` Theodore Ts'o
2014-09-17 15:52 ` Zach Brown
2014-09-16 21:04 ` Christoph Hellwig
2014-09-16 21:24 ` Jeff Moyer
2014-09-15 20:27 ` [RFC PATCH 0/7] Non-blockling buffered fs read (page cache only) Milosz Tanski
2014-09-15 21:33 ` Andreas Dilger
2014-09-15 22:13 ` Milosz Tanski
2014-09-15 22:36 ` Elliott, Robert (Server Storage)
2014-09-16 18:24 ` Zach Brown
2014-09-19 11:21 ` Christoph Hellwig
2014-09-22 15:48 ` Jeff Moyer
2014-09-22 16:32 ` Milosz Tanski
2014-09-22 16:42 ` Christoph Hellwig
2014-09-22 17:02 ` Milosz Tanski
2014-09-22 16:25 ` Elliott, Robert (Server Storage)
2014-09-15 21:58 ` Jeff Moyer
2014-09-15 22:27 ` Milosz Tanski
2014-09-16 13:44 ` Jeff Moyer
2014-09-19 11:23 ` Christoph Hellwig
2014-09-16 19:30 ` Jeff Moyer
2014-09-16 20:34 ` Milosz Tanski
2014-09-16 20:49 ` Jeff Moyer
2014-09-17 14:49 ` [RFC 1/2] aio: async readahead Benjamin LaHaise
2014-09-17 15:26 ` [RFC 2/2] ext4: async readpage for indirect style inodes Benjamin LaHaise
2014-09-19 11:26 ` Christoph Hellwig [this message]
2014-09-19 16:01 ` [RFC 1/2] aio: async readahead Benjamin LaHaise
2014-09-17 22:20 ` [RFC v2 0/5] Non-blockling buffered fs read (page cache only) Milosz Tanski
2014-09-17 22:20 ` [RFC v2 1/5] Prepare for adding a new readv/writev with user flags Milosz Tanski
2014-09-17 22:20 ` [RFC v2 2/5] Define new syscalls readv2,preadv2,writev2,pwritev2 Milosz Tanski
2014-09-18 18:48 ` Darrick J. Wong
2014-09-19 10:52 ` Christoph Hellwig
2014-09-20 0:19 ` Darrick J. Wong
2014-09-17 22:20 ` [RFC v2 3/5] Export new vector IO (with flags) to userland Milosz Tanski
2014-09-17 22:20 ` [RFC v2 4/5] O_NONBLOCK flag for readv2/preadv2 Milosz Tanski
2014-09-19 11:27 ` Christoph Hellwig
2014-09-19 11:59 ` Milosz Tanski
2014-09-22 17:12 ` Jeff Moyer
2014-09-17 22:20 ` [RFC v2 5/5] Check for O_NONBLOCK in all read_iter instances Milosz Tanski
2014-09-19 11:26 ` Christoph Hellwig
2014-09-19 14:42 ` [RFC v2 0/5] Non-blockling buffered fs read (page cache only) Jonathan Corbet
2014-09-19 16:13 ` Volker Lendecke
2014-09-19 17:19 ` Milosz Tanski
2014-09-19 17:33 ` Milosz Tanski
2014-09-22 14:12 ` Jonathan Corbet
2014-09-22 14:24 ` Jeff Moyer
2014-09-22 14:25 ` Christoph Hellwig
2014-09-22 14:30 ` Milosz Tanski
2014-09-24 21:46 ` [RFC v3 0/4] vfs: " Milosz Tanski
2014-09-24 21:46 ` [RFC v3 1/4] vfs: Prepare for adding a new preadv/pwritev with user flags Milosz Tanski
2014-09-24 21:46 ` [RFC v3 2/4] vfs: Define new syscalls preadv2,pwritev2 Milosz Tanski
2014-09-24 21:46 ` [RFC v3 3/4] vfs: Export new vector IO syscalls (with flags) to userland Milosz Tanski
2014-09-24 21:46 ` [RFC v3 4/4] vfs: RWF_NONBLOCK flag for preadv2 Milosz Tanski
2014-09-25 4:06 ` [RFC v3 0/4] vfs: Non-blockling buffered fs read (page cache only) Michael Kerrisk
2014-09-25 11:16 ` Jan Kara
2014-09-25 15:48 ` Milosz Tanski
2014-10-08 2:53 ` Milosz Tanski
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