On Mon, Nov 16, 2015 at 6:05 AM, Jan Kara <jack@xxxxxxx> wrote: > On Mon 16-11-15 14:37:14, Jan Kara wrote: [..] > But a question: Won't it be better to do sfence + pcommit only in response > to REQ_FLUSH request and don't do it after each write? I'm not sure how > expensive these instructions are but in theory it could be a performance > win, couldn't it? For filesystems this is enough wrt persistency > guarantees... We would need to gather the performance data... The expectation is that the cache flushing is more expensive than the sfence + pcommit. _______________________________________________ xfs mailing list xfs@xxxxxxxxxxx http://oss.sgi.com/mailman/listinfo/xfs
