From: Christoph Hellwig <hch@infradead.org>
To: Dave Chinner <david@fromorbit.com>
Cc: xfs@oss.sgi.com
Subject: Re: [PATCH 04/12] xfs: combine grant heads into a single 64 bit integer
Date: Mon, 20 Dec 2010 06:40:20 -0500 [thread overview]
Message-ID: <20101220114020.GC12806@infradead.org> (raw)
In-Reply-To: <1292215483-18224-5-git-send-email-david@fromorbit.com>
On Mon, Dec 13, 2010 at 03:44:35PM +1100, Dave Chinner wrote:
> From: Dave Chinner <dchinner@redhat.com>
>
> Prepare for switching the grant heads to atomic variables by
> combining the two 32 bit values that make up the grant head into a
> single 64 bit variable. Provide wrapper functions to combine and
> split the grant heads appropriately for calculations and use them as
> necessary.
>
> Signed-off-by: Dave Chinner <dchinner@redhat.com>
Looks good,
Reviewed-by: Christoph Hellwig <hch@lst.de>
Minor nitpick:
> + if ((tail_cycle == head_cycle) && (head_bytes >= tail_bytes)) {
> + free_bytes = log->l_logsize - (head_bytes - tail_bytes);
> + } else if ((tail_cycle + 1) < head_cycle) {
Lots of superflous braces in the if statements.
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next prev parent reply other threads:[~2010-12-20 11:38 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-12-13 4:44 xfs: grant lock scaling and removal V3 Dave Chinner
2010-12-13 4:44 ` [PATCH 01/12] xfs: convert log grant ticket queues to list heads Dave Chinner
2010-12-20 11:34 ` Christoph Hellwig
2010-12-21 0:55 ` Dave Chinner
2010-12-13 4:44 ` [PATCH 02/12] xfs: fact out common grant head/log tail verification code Dave Chinner
2010-12-20 11:51 ` Christoph Hellwig
2010-12-13 4:44 ` [PATCH 03/12] xfs: rework log grant space calculations Dave Chinner
2010-12-20 11:37 ` Christoph Hellwig
2010-12-13 4:44 ` [PATCH 04/12] xfs: combine grant heads into a single 64 bit integer Dave Chinner
2010-12-20 11:40 ` Christoph Hellwig [this message]
2010-12-13 4:44 ` [PATCH 05/12] xfs: use wait queues directly for the log wait queues Dave Chinner
2010-12-20 11:40 ` Christoph Hellwig
2010-12-13 4:44 ` [PATCH 06/12] xfs: make AIL tail pushing independent of the grant lock Dave Chinner
2010-12-20 11:41 ` Christoph Hellwig
2010-12-13 4:44 ` [PATCH 07/12] xfs: convert l_last_sync_lsn to an atomic variable Dave Chinner
2010-12-13 4:44 ` [PATCH 08/12] xfs: convert l_tail_lsn " Dave Chinner
2010-12-20 12:06 ` Christoph Hellwig
2010-12-21 1:27 ` Dave Chinner
2010-12-13 4:44 ` [PATCH 09/12] xfs: convert log grant heads to atomic variables Dave Chinner
2010-12-13 4:44 ` [PATCH 10/12] xfs: introduce new locks for the log grant ticket wait queues Dave Chinner
2010-12-20 11:49 ` Christoph Hellwig
2010-12-13 4:44 ` [PATCH 11/12] xfs: convert grant head manipulations to lockless algorithm Dave Chinner
2010-12-20 11:50 ` Christoph Hellwig
2010-12-13 4:44 ` [PATCH 12/12] xfs: kill useless spinlock_destroy macro Dave Chinner
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