From: Dave Chinner <david@fromorbit.com>
To: fstests@vger.kernel.org
Subject: [PATCH 0/3] generic: fixes for different allocation behaviours
Date: Thu, 14 May 2015 11:53:34 +1000 [thread overview]
Message-ID: <1431568417-6462-1-git-send-email-david@fromorbit.com> (raw)
Hi folks,
These 3 patches address failures I found when testing the XFS DAX
functionality. DAX disables delayed allocation on XFS, so the size
of the buffer in the write() call determines the size of the
allocation that is done. Hence tests that expect a specific extent
layout need to do IO in buffers as large as the extent size they
expect to be created.
The other side of this is that some tests also expect partial writes
to occur, which happened as a side effect of buffered writes being
broken down into PAGE_SIZE chunks. With DAX, that does not happen -
the writes tend to either succeed or fail completely, especially if
it is an ENOSPC condition that is ocurring.
HEnce these patches address these test assumptions, and now they
work correctly and pass on both DAX and non-DAX filesystems.
Cheers,
Dave.
next reply other threads:[~2015-05-14 1:53 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-05-14 1:53 Dave Chinner [this message]
2015-05-14 1:53 ` [PATCH 1/3] generic/018: use xfs_io and larger buffers for writes Dave Chinner
2015-05-14 1:53 ` [PATCH 2/3] generic/223, xfs/203: IO is not well aligned Dave Chinner
2015-05-14 1:53 ` [PATCH 3/3] generic/275: writes may not partially succeed Dave Chinner
2015-05-19 12:23 ` [PATCH 0/3] generic: fixes for different allocation behaviours Brian Foster
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