From: Christoph Hellwig <hch@infradead.org>
To: Chandan Babu R <chandanrlinux@gmail.com>
Cc: Christoph Hellwig <hch@infradead.org>,
linux-xfs@vger.kernel.org, darrick.wong@oracle.com,
david@fromorbit.com
Subject: Re: [PATCH V6 08/11] xfs: Check for extent overflow when remapping an extent
Date: Fri, 16 Oct 2020 08:04:48 +0100 [thread overview]
Message-ID: <20201016070448.GA12318@infradead.org> (raw)
In-Reply-To: <1680655.hsWa3aTUJI@garuda>
On Thu, Oct 15, 2020 at 03:31:26PM +0530, Chandan Babu R wrote:
> How about following the traits of XFS_IEXT_WRITE_UNWRITTEN_CNT (writing
> to unwritten extent) and XFS_IEXT_REFLINK_END_COW_CNT (moving an extent
> from cow fork to data fork) and setting XFS_IEXT_REFLINK_REMAP_CNT to a
> worst case value of 2? A write spanning the entirety of an unwritten extent
> does not change the extent count. Similarly, If there are no extents in the
> data fork spanning the file range mapped by an extent in the cow
> fork, moving the extent from cow fork to data fork increases the extent count
> by just 1 and not by the worst case count of 2.
No, I think the dynamic value is perfectly fine, as we have all the
information trivially available. I just don't think having a separate
macro and the comment explaining it away from the actual functionality
is helpful.
next prev parent reply other threads:[~2020-10-16 7:04 UTC|newest]
Thread overview: 32+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-10-12 9:29 [PATCH V6 00/11] Bail out if transaction can cause extent count to overflow Chandan Babu R
2020-10-12 9:29 ` [PATCH V6 01/11] xfs: Add helper for checking per-inode extent count overflow Chandan Babu R
2020-10-15 8:34 ` Christoph Hellwig
2020-10-12 9:29 ` [PATCH V6 02/11] xfs: Check for extent overflow when trivally adding a new extent Chandan Babu R
2020-10-15 8:34 ` Christoph Hellwig
2020-10-12 9:29 ` [PATCH V6 03/11] xfs: Check for extent overflow when punching a hole Chandan Babu R
2020-10-15 8:35 ` Christoph Hellwig
2020-10-12 9:29 ` [PATCH V6 04/11] xfs: Check for extent overflow when adding/removing xattrs Chandan Babu R
2020-10-15 8:36 ` Christoph Hellwig
2020-10-12 9:29 ` [PATCH V6 05/11] xfs: Check for extent overflow when adding/removing dir entries Chandan Babu R
2020-10-15 8:36 ` Christoph Hellwig
2020-10-12 9:29 ` [PATCH V6 06/11] xfs: Check for extent overflow when writing to unwritten extent Chandan Babu R
2020-10-15 8:36 ` Christoph Hellwig
2020-10-12 9:29 ` [PATCH V6 07/11] xfs: Check for extent overflow when moving extent from cow to data fork Chandan Babu R
2020-10-15 8:37 ` Christoph Hellwig
2020-10-12 9:29 ` [PATCH V6 08/11] xfs: Check for extent overflow when remapping an extent Chandan Babu R
2020-10-15 8:39 ` Christoph Hellwig
2020-10-15 10:01 ` Chandan Babu R
2020-10-15 18:45 ` Darrick J. Wong
2020-10-16 4:27 ` Chandan Babu R
2020-10-16 7:04 ` Christoph Hellwig [this message]
2020-10-16 11:28 ` Chandan Babu R
2020-10-16 15:29 ` Darrick J. Wong
2020-10-17 2:55 ` Chandan Babu R
2020-10-12 9:29 ` [PATCH V6 09/11] xfs: Check for extent overflow when swapping extents Chandan Babu R
2020-10-12 9:29 ` [PATCH V6 10/11] xfs: Introduce error injection to reduce maximum inode fork extent count Chandan Babu R
2020-10-15 8:40 ` Christoph Hellwig
2020-10-12 9:29 ` [PATCH V6 11/11] xfs: Introduce error injection to allocate only minlen size extents for files Chandan Babu R
2020-10-15 8:41 ` Christoph Hellwig
2020-10-15 10:02 ` Chandan Babu R
2020-10-15 18:41 ` Darrick J. Wong
2020-10-16 11:31 ` Chandan Babu R
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