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Message-ID: <20110712103453.GC31226@quack.suse.cz> Date: Tue, 12 Jul 2011 12:34:53 +0200 From: Jan Kara <jack@...e.cz> To: Christoph Hellwig <hch@...radead.org> Cc: Jan Kara <jack@...e.cz>, Curt Wohlgemuth <curtw@...gle.com>, Al Viro <viro@...iv.linux.org.uk>, linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org, fengguang.wu@...el.com Subject: Re: [PATCH] writeback: Don't wait for completion in writeback_inodes_sb_nr On Mon 11-07-11 16:11:57, Christoph Hellwig wrote: > On Mon, Jul 11, 2011 at 09:48:35PM +0200, Jan Kara wrote: > > Well, they're not exactly cheap (journaling filesystems have to force > > transaction commits and wait for them) but that does not really matter. > > The real problem is that to wait for IO completion you need some list of > > inodes you want to wait for and you can currently get such list only from > > superblock. > > All block device inodes sit on blockdev_superblock, we got rid of inodes > without a superblock long time ago. Sure, we can easily iterate also blockdev_superblock. What I meant is that blockdev_superblock will need a special handling since we otherwise ignore pseudo superblocks... Honza -- Jan Kara <jack@...e.cz> SUSE Labs, CR -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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