On Fri, Oct 08, 2010 at 07:00:27PM +0400, Dmitry Monakhov wrote: > If we about to write many inodes at the time, even in for > data integrity sync, it is reasonable to skip data integrity > logic for each inode, but perform all necessary steps at the end. > > The frozen sync() issue: > If we try to call sync() then other process dirties inodes in > parallels we end up with writing inodes in sync mode, which > usually result in io_barriers spam. Which result in almost 100 times > performance degradation. Please don't add even more flags for that. The only ->write_inode call that actually needs this is the one from nfsd, and filesystems can just implement the commit_metadata inode operation to force out transactions there. That's what we've been doing in XFS for a while now. -- To unsubscribe from this list: send the line "unsubscribe linux-ext4" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
