From: Christoph Hellwig <hch@infradead.org>
To: Chandan Babu R <chandanrlinux@gmail.com>
Cc: linux-xfs@vger.kernel.org, david@fromorbit.com,
darrick.wong@oracle.com, bfoster@redhat.com, hch@infradead.org
Subject: Re: [PATCH 6/7] xfs: Extend data extent counter to 47 bits
Date: Fri, 19 Jun 2020 07:38:46 -0700 [thread overview]
Message-ID: <20200619143846.GC29528@infradead.org> (raw)
In-Reply-To: <20200606082745.15174-7-chandanrlinux@gmail.com>
On Sat, Jun 06, 2020 at 01:57:44PM +0530, Chandan Babu R wrote:
> This commit extends the per-inode data extent counter to 47 bits. The
> length of 47-bits was chosen because,
> Maximum file size = 2^63.
> Maximum extent count when using 64k block size = 2^63 / 2^16 = 2^47.
What is the use case for a large nuber of extents? I'm not sure why
we'd want to bother, but if there is a good reason it really should
be documented here.
next prev parent reply other threads:[~2020-06-19 16:50 UTC|newest]
Thread overview: 40+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-06-06 8:27 [PATCH 0/7] xfs: Extend per-inode extent counters Chandan Babu R
2020-06-06 8:27 ` [PATCH 1/7] xfs: Fix log reservation calculation for xattr insert operation Chandan Babu R
2020-06-19 14:33 ` Christoph Hellwig
2020-06-20 12:53 ` Chandan Babu R
2020-06-06 8:27 ` [PATCH 2/7] xfs: Check for per-inode extent count overflow Chandan Babu R
2020-06-08 16:24 ` Darrick J. Wong
2020-06-08 16:32 ` Darrick J. Wong
2020-06-09 14:22 ` Chandan Babu R
2020-06-09 17:07 ` Darrick J. Wong
2020-06-10 6:24 ` Chandan Babu R
2020-06-09 14:22 ` Chandan Babu R
2020-06-09 17:10 ` Darrick J. Wong
2020-06-19 14:36 ` Christoph Hellwig
2020-06-19 21:31 ` Darrick J. Wong
2020-06-20 12:53 ` Chandan Babu R
2020-06-06 8:27 ` [PATCH 3/7] xfs: Compute maximum height of directory BMBT separately Chandan Babu R
2020-06-08 20:59 ` Darrick J. Wong
2020-06-09 14:23 ` Chandan Babu R
2020-06-09 18:40 ` Darrick J. Wong
2020-06-10 6:23 ` Chandan Babu R
2020-06-11 6:38 ` Chandan Babu R
2020-06-06 8:27 ` [PATCH 4/7] xfs: Add "Use Dir BMBT height" argument to XFS_BM_MAXLEVELS() Chandan Babu R
2020-06-08 17:50 ` Darrick J. Wong
2020-06-09 14:23 ` Chandan Babu R
2020-06-06 8:27 ` [PATCH 5/7] xfs: Use 2^27 as the maximum number of directory extents Chandan Babu R
2020-06-08 16:52 ` Darrick J. Wong
2020-06-09 14:23 ` Chandan Babu R
2020-06-06 8:27 ` [PATCH 6/7] xfs: Extend data extent counter to 47 bits Chandan Babu R
2020-06-08 17:14 ` Darrick J. Wong
2020-06-09 14:23 ` Chandan Babu R
2020-08-31 21:05 ` Darrick J. Wong
2020-06-19 14:38 ` Christoph Hellwig [this message]
2020-06-20 12:52 ` Chandan Babu R
2020-06-06 8:27 ` [PATCH 7/7] xfs: Extend attr extent counter to 32 bits Chandan Babu R
2020-06-08 17:21 ` Darrick J. Wong
2020-06-09 14:22 ` Chandan Babu R
2020-06-19 14:39 ` Christoph Hellwig
2020-06-20 12:53 ` Chandan Babu R
2020-06-08 17:31 ` [PATCH 0/7] xfs: Extend per-inode extent counters Darrick J. Wong
2020-06-09 14:22 ` Chandan Babu R
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