[Bug 22452] data corruption after mmap()ing a file and writev() some data to another file

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https://bugzilla.kernel.org/show_bug.cgi?id=22452





--- Comment #2 from Christoph Hellwig <hch@xxxxxx>  2010-11-09 00:26:06 ---
Created an attachment (id=36842)
 --> (https://bugzilla.kernel.org/attachment.cgi?id=36842)
Handle delalloc truncation during failed writes without xfs_setattr

This is a patch that fixes your testcase by not using xfs_setattr for
truncating delalloc blocks on a failed write, but rather doing it manually.  It
does pass xfstests for me, but probably isn't the final version yet.  I'll move
additional discussion on it to the mailinglist.

Btw, can you license your testcase under GPLv2 or any less restrictive license?
 We'd like to include it in the xfstests regression test suite.

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