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Date: Tue, 4 Jun 2013 13:29:22 -0400 From: Theodore Ts'o <tytso@....edu> To: Jan Kara <jack@...e.cz> Cc: linux-ext4@...r.kernel.org Subject: Re: [PATCH 17/26] ext4: Use transaction reservation for extent conversion in ext4_end_io On Fri, May 31, 2013 at 11:42:50AM +0200, Jan Kara wrote: > Later we would like to clear PageWriteback bit only after extent conversion > from unwritten to written extents is performed. However it is not possible > to start a transaction after PageWriteback is set because that violates > lock ordering (and is easy to deadlock). So we have to reserve a transaction > before locking pages and sending them for IO and later we use the transaction > for extent conversion from ext4_end_io(). > > Reviewed-by: Zheng Liu <wenqing.lz@...bao.com> > Signed-off-by: Jan Kara <jack@...e.cz> Thanks, applied. - Ted -- 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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