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Date: Wed, 03 Feb 2016 14:43:02 -0500 From: Jeff Moyer <jmoyer@...hat.com> To: Christoph Hellwig <hch@....de> Cc: linux-fsdevel@...r.kernel.org, xfs@....sgi.com, linux-ext4@...r.kernel.org, ocfs2-devel@....oracle.com Subject: Re: vfs/xfs: directio updates to ease COW handling V2 Hi, Christoph, Can you explain a bit what you mean by easing COW handling? Whenever I see COW referenced near DIO, my mind always turns to g_u_p vs. fork. Thanks! Jeff Christoph Hellwig <hch@....de> writes: > See http://www.infradead.org/rpr.html > > The first patch ensures ->end_io is always called for direct I/O requests > that pass it in, even if there was a zero length write, or if an error > occured. The existing users have been updated to ignore it, but XFS > will make use of it in the future, and a comment in ext4 suggests it > might be useful for it as well. > > The other two simplify the XFS direct I/O code. > > Changes since V1: > - allow ->end_io to return errors > - a comment spelling fix > > > -- > To unsubscribe from this list: send the line "unsubscribe linux-fsdevel" in > the body of a message to majordomo@...r.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html -- To unsubscribe from this list: send the line "unsubscribe linux-ext4" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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