From: Andrew Morton <akpm@osdl.org>
To: NeilBrown <neilb@suse.de>
Cc: linux-raid@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH 010 of 13] md: Only checkpoint expansion progress occasionally.
Date: Thu, 16 Mar 2006 22:17:43 -0800 [thread overview]
Message-ID: <20060316221743.71a21520.akpm@osdl.org> (raw)
In-Reply-To: <1060317044814.16208@suse.de>
NeilBrown <neilb@suse.de> wrote:
>
> diff ./drivers/md/raid5.c~current~ ./drivers/md/raid5.c
> --- ./drivers/md/raid5.c~current~ 2006-03-17 11:48:58.000000000 +1100
> +++ ./drivers/md/raid5.c 2006-03-17 11:48:58.000000000 +1100
> @@ -1747,8 +1747,9 @@ static int make_request(request_queue_t
That's a fairly complex function..
I wonder about this:
spin_lock_irq(&conf->device_lock);
if (--bi->bi_phys_segments == 0) {
int bytes = bi->bi_size;
if ( bio_data_dir(bi) == WRITE )
md_write_end(mddev);
bi->bi_size = 0;
bi->bi_end_io(bi, bytes, 0);
}
spin_unlock_irq(&conf->device_lock);
bi_end_io() can be somewhat expensive. Does it need to happen under the lock?
next prev parent reply other threads:[~2006-03-17 6:17 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-03-17 4:47 [PATCH 000 of 13] md: Introduction NeilBrown
2006-03-17 4:47 ` [PATCH 001 of 13] md: Add '4' to the list of levels for which bitmaps are supported NeilBrown
2006-03-17 4:47 ` [PATCH 002 of 13] md: Fix the 'failed' count for version-0 superblocks NeilBrown
2006-03-17 4:47 ` [PATCH 003 of 13] md: Update status_resync to handle LARGE devices NeilBrown
2006-03-17 4:47 ` [PATCH 004 of 13] md: Split disks array out of raid5 conf structure so it is easier to grow NeilBrown
2006-03-17 4:47 ` [PATCH 005 of 13] md: Allow stripes to be expanded in preparation for expanding an array NeilBrown
2006-03-17 5:50 ` Andrew Morton
2006-03-17 6:04 ` Neil Brown
2006-03-17 5:53 ` Andrew Morton
2006-03-17 5:57 ` Andrew Morton
2006-03-17 6:24 ` Neil Brown
2006-03-17 4:47 ` [PATCH 006 of 13] md: Infrastructure to allow normal IO to continue while array is expanding NeilBrown
2006-03-17 6:01 ` Andrew Morton
2006-03-17 6:17 ` Neil Brown
2006-03-17 4:47 ` [PATCH 007 of 13] md: Core of raid5 resize process NeilBrown
2006-03-17 6:03 ` Andrew Morton
2006-03-17 7:10 ` Neil Brown
2006-03-17 4:48 ` [PATCH 008 of 13] md: Final stages of raid5 expand code NeilBrown
2006-03-17 4:48 ` [PATCH 009 of 13] md: Checkpoint and allow restart of raid5 reshape NeilBrown
2006-03-17 4:48 ` [PATCH 010 of 13] md: Only checkpoint expansion progress occasionally NeilBrown
2006-03-17 6:17 ` Andrew Morton [this message]
2006-03-17 4:48 ` [PATCH 011 of 13] md: Split reshape handler in check_reshape and start_reshape NeilBrown
2006-03-17 4:48 ` [PATCH 012 of 13] md: Make 'reshape' a possible sync_action action NeilBrown
2006-03-17 4:48 ` [PATCH 013 of 13] md: Support suspending of IO to regions of an md array NeilBrown
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