From: Jens Axboe <axboe@kernel.dk>
To: Christoph Hellwig <hch@infradead.org>
Cc: linux-kernel@vger.kernel.org, Al Viro <viro@zeniv.linux.org.uk>
Subject: Re: [PATCH 05/11] direct-io: only inc/dec inode->i_dio_count for file systems
Date: Thu, 24 Oct 2013 10:49:48 +0100 [thread overview]
Message-ID: <20131024094948.GT14598@kernel.dk> (raw)
In-Reply-To: <20131024094713.GA17840@infradead.org>
On Thu, Oct 24 2013, Christoph Hellwig wrote:
> On Thu, Oct 24, 2013 at 10:46:00AM +0100, Jens Axboe wrote:
> > On Thu, Oct 24 2013, Jens Axboe wrote:
> > > We don't need truncate protection for block devices, so add a flag
> > > bypassing this cache line dirtying twice for every IO. This easily
> > > contributes to 5-10% of the CPU time on high IOPS O_DIRECT testing.
> >
> > There's a merge error in this patch, please find the correct one below.
>
> Btw, I think this patch should not go in with this series but rather via
> the VFS tree as it's not related to the blk-mq infrastructure at all.
That'd be fine with me, if Al could pick it up if he agrees with it.
Feel free to add an acked/review-by :-)
--
Jens Axboe
next prev parent reply other threads:[~2013-10-24 9:49 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-10-24 9:25 Jens Axboe
2013-10-24 9:25 ` [PATCH 01/11] Export __smp_call_function_single() Jens Axboe
2013-10-24 9:50 ` Christoph Hellwig
2013-10-24 10:16 ` Jens Axboe
2013-10-24 12:50 ` Christoph Hellwig
2013-10-25 10:21 ` Ingo Molnar
2013-10-25 10:44 ` Jens Axboe
2013-10-25 10:45 ` Ingo Molnar
2013-10-24 9:25 ` [PATCH 02/11] smp: don't warn about csd->flags having CSD_FLAG_LOCK cleared for !wait Jens Axboe
2013-10-24 9:39 ` Christoph Hellwig
2013-10-24 9:25 ` [PATCH 03/11] block: make rq->cmd_flags be 64-bit Jens Axboe
2013-10-24 9:40 ` Christoph Hellwig
2013-10-24 9:25 ` [PATCH 04/11] block: remove request ref_count Jens Axboe
2013-10-24 9:25 ` [PATCH 05/11] direct-io: only inc/dec inode->i_dio_count for file systems Jens Axboe
2013-10-24 9:46 ` Jens Axboe
2013-10-24 9:47 ` Christoph Hellwig
2013-10-24 9:49 ` Jens Axboe [this message]
2015-02-05 16:54 ` Mike Snitzer
2013-10-24 9:25 ` [PATCH 06/11] percpu_counter: make APIs irq safe Jens Axboe
2013-10-24 9:26 ` [PATCH 07/11] percpu_ida: make percpu_ida percpu size/batch configurable Jens Axboe
2013-10-24 9:26 ` [PATCH 08/11] percpu_ida: add percpu_ida_for_each_free Jens Axboe
2013-10-24 9:26 ` [PATCH 09/11] percpu_ida: add an API to return free tags Jens Axboe
2013-10-24 9:26 ` [PATCH 10/11] blk-mq: new multi-queue block IO queueing mechanism Jens Axboe
2013-10-24 9:39 ` Dave Jones
2013-10-24 9:50 ` Jens Axboe
2013-10-24 9:51 ` Christoph Hellwig
2013-10-24 9:26 ` [PATCH 11/11] null_blk: multi queue aware block test driver Jens Axboe
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