From: Alex Elder <aelder@sgi.com>
To: Dave Chinner <david@fromorbit.com>
Cc: xfs@oss.sgi.com
Subject: Re: [PATCH 12/16] xfs: implement batched inode lookups for AG walking
Date: Mon, 27 Sep 2010 11:05:04 -0500 [thread overview]
Message-ID: <1285603504.2380.14.camel@doink> (raw)
In-Reply-To: <20100924091522.GT2614@dastard>
On Fri, 2010-09-24 at 19:15 +1000, Dave Chinner wrote:
> On Thu, Sep 23, 2010 at 12:17:05PM -0500, Alex Elder wrote:
> > On Wed, 2010-09-22 at 16:44 +1000, Dave Chinner wrote:
> > > From: Dave Chinner <dchinner@redhat.com>
> > >
> > > With the reclaim code separated from the generic walking code, it is
> > > simple to implement batched lookups for the generic walk code.
. . .
> > The gang lookup should never return
> > anything beyond the end of the AG. It seems
> > like you ought to be able to detect when you've
> > covered all the whole AG elsewhere,
>
> AFAICT, there are only two ways - the gang lookup returns nothing,
> or we see the last valid inode number in the AG. If you can come up
> with something that doesn't invlove a tree or inode number lookup,
> I'm all ears....
I didn't have anything specific in mind and was basing
this somewhat on gut feeling so you probably have the
best solution as-is. But I'll look at your new code
and if I come up with any bright ideas I'll let you
know.
-Alex
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next prev parent reply other threads:[~2010-09-27 16:05 UTC|newest]
Thread overview: 39+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-09-22 6:44 [PATCH 0/16] xfs: metadata scalability V2 Dave Chinner
2010-09-22 6:44 ` [PATCH 01/16] xfs: reduce the number of CIL lock round trips during commit Dave Chinner
2010-09-22 16:51 ` Christoph Hellwig
2010-09-22 19:57 ` Alex Elder
2010-09-22 6:44 ` [PATCH 02/16] xfs: remove debug assert for per-ag reference counting Dave Chinner
2010-09-22 6:44 ` [PATCH 03/16] xfs: lockless per-ag lookups Dave Chinner
2010-09-22 6:44 ` [PATCH 04/16] xfs: don't use vfs writeback for pure metadata modifications Dave Chinner
2010-09-22 17:24 ` Christoph Hellwig
2010-09-23 0:36 ` Dave Chinner
2010-09-23 16:19 ` Alex Elder
2010-09-22 6:44 ` [PATCH 05/16] xfs: rename xfs_buf_get_nodaddr to be more appropriate Dave Chinner
2010-09-22 17:25 ` Christoph Hellwig
2010-09-23 0:37 ` Dave Chinner
2010-09-23 16:22 ` Alex Elder
2010-09-22 6:44 ` [PATCH 06/16] xfs: introduced uncached buffer read primitve Dave Chinner
2010-09-22 6:44 ` [PATCH 07/16] xfs: store xfs_mount in the buftarg instead of in the xfs_buf Dave Chinner
2010-09-22 6:44 ` [PATCH 08/16] xfs: kill XBF_FS_MANAGED buffers Dave Chinner
2010-09-22 6:44 ` [PATCH 09/16] xfs: use unhashed buffers for size checks Dave Chinner
2010-09-22 6:44 ` [PATCH 10/16] xfs: remove buftarg hash for external devices Dave Chinner
2010-09-22 6:44 ` [PATCH 11/16] xfs: split inode AG walking into separate code for reclaim Dave Chinner
2010-09-22 17:28 ` Christoph Hellwig
2010-09-23 16:45 ` Alex Elder
2010-09-22 6:44 ` [PATCH 12/16] xfs: implement batched inode lookups for AG walking Dave Chinner
2010-09-22 17:33 ` Christoph Hellwig
2010-09-23 0:40 ` Dave Chinner
2010-09-23 17:17 ` Alex Elder
2010-09-24 9:15 ` Dave Chinner
2010-09-27 16:05 ` Alex Elder [this message]
2010-09-27 17:43 ` Alex Elder
2010-09-22 6:44 ` [PATCH 13/16] xfs: batch inode reclaim lookup Dave Chinner
2010-09-22 17:34 ` Christoph Hellwig
2010-09-23 0:43 ` Dave Chinner
2010-09-23 17:39 ` Alex Elder
2010-09-22 6:44 ` [PATCH 14/16] xfs: serialise inode reclaim within an AG Dave Chinner
2010-09-23 17:50 ` Alex Elder
2010-09-22 6:44 ` [PATCH 16/16] xfs; pack xfs_buf structure more tightly Dave Chinner
2010-09-22 14:53 ` [PATCH 0/16] xfs: metadata scalability V2 Christoph Hellwig
2010-09-22 20:55 ` Alex Elder
2010-09-23 0:46 ` [PATCH 15/16] xfs: convert buffer cache hash to rbtree Dave Chinner
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