Messages in this thread | | | Date | Wed, 15 Jan 2020 07:48:27 +0100 | From | Christoph Hellwig <> | Subject | Re: [PATCH 08/12] ext4: hold i_rwsem until AIO completes |
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On Tue, Jan 14, 2020 at 04:50:23PM -0500, Theodore Y. Ts'o wrote: > I note that you've dropped the inode_dio_wait() in ext4's ZERO_RANGE, > COLLAPSE_RANGE, INSERT_RANGE, etc. We had added these to avoid > problems when various fallocate operations which modify the inode's > logical->physical block mapping racing with direct I/O (both reads or > writes). > > I don't see a replacement protection in this patch series. How does > are file systems supported to protect against such races?
By holding i_rwsem until the direct I/O operations are finished, and not just until they are sumbitted.
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