From: Matthew Wilcox <willy@infradead.org>
To: Dave Chinner <david@fromorbit.com>
Cc: Ming Lei <ming.lei@redhat.com>, Vlastimil Babka <vbabka@suse.cz>,
"Darrick J . Wong" <darrick.wong@oracle.com>,
linux-xfs@vger.kernel.org, Jens Axboe <axboe@kernel.dk>,
Vitaly Kuznetsov <vkuznets@redhat.com>,
Dave Chinner <dchinner@redhat.com>,
Christoph Hellwig <hch@lst.de>,
Alexander Duyck <alexander.h.duyck@linux.intel.com>,
Aaron Lu <aaron.lu@intel.com>, Christopher Lameter <cl@linux.com>,
Linux FS Devel <linux-fsdevel@vger.kernel.org>,
linux-mm@kvack.org, linux-block@vger.kernel.org
Subject: Re: [PATCH] xfs: allocate sector sized IO buffer via page_frag_alloc
Date: Mon, 25 Feb 2019 19:27:37 -0800 [thread overview]
Message-ID: <20190226032737.GA11592@bombadil.infradead.org> (raw)
In-Reply-To: <20190226030214.GI23020@dastard>
On Tue, Feb 26, 2019 at 02:02:14PM +1100, Dave Chinner wrote:
> > Or what is the exact size of sub-page IO in xfs most of time? For
>
> Determined by mkfs parameters. Any power of 2 between 512 bytes and
> 64kB needs to be supported. e.g:
>
> # mkfs.xfs -s size=512 -b size=1k -i size=2k -n size=8k ....
>
> will have metadata that is sector sized (512 bytes), filesystem
> block sized (1k), directory block sized (8k) and inode cluster sized
> (32k), and will use all of them in large quantities.
If XFS is going to use each of these in large quantities, then it doesn't
seem unreasonable for XFS to create a slab for each type of metadata?
next prev parent reply other threads:[~2019-02-26 3:27 UTC|newest]
Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-02-25 4:09 [PATCH] xfs: allocate sector sized IO buffer via page_frag_alloc Ming Lei
2019-02-25 4:36 ` Dave Chinner
2019-02-25 8:46 ` Ming Lei
2019-02-25 10:03 ` Ming Lei
2019-02-25 20:11 ` Dave Chinner
2019-02-25 13:15 ` Vlastimil Babka
2019-02-25 20:26 ` Dave Chinner
2019-02-26 2:22 ` Ming Lei
2019-02-26 3:02 ` Dave Chinner
2019-02-26 3:27 ` Matthew Wilcox [this message]
2019-02-26 4:58 ` Dave Chinner
2019-02-26 9:33 ` Ming Lei
2019-02-26 10:06 ` Vlastimil Babka
2019-02-26 11:12 ` Ming Lei
2019-02-26 12:12 ` Matthew Wilcox
2019-02-26 12:35 ` Ming Lei
2019-02-26 13:02 ` Matthew Wilcox
2019-02-26 13:42 ` Ming Lei
2019-02-26 14:04 ` Matthew Wilcox
2019-02-26 16:14 ` Darrick J. Wong
2019-02-26 16:19 ` Matthew Wilcox
2019-02-27 1:41 ` Ming Lei
2019-02-27 7:07 ` Vlastimil Babka
2019-03-08 8:18 ` Christoph Hellwig
2019-02-27 21:38 ` Dave Chinner
2019-02-26 15:30 ` Christopher Lameter
2019-02-26 20:45 ` Dave Chinner
2019-02-27 1:50 ` Ming Lei
2019-02-27 3:41 ` Dave Chinner
2019-02-26 15:20 ` Christopher Lameter
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