On Thu, Aug 13, 2015 at 11:34:42AM -0400, Tejun Heo wrote: > On Thu, Aug 13, 2015 at 10:44:35AM +1000, Dave Chinner wrote: > > It might be a couple of days before I really get a chance to dig > > into this, so it might be best if Tejun can look into it first. > > Yeap, have been looking into it since yesterday. I have some > suspicions. I'll write once I know more. So, here are what I've found out till now. * I can't reproduce it for some reason. * There's a bug in b_dirty_time handling. sync_inodes_sb() should schedule writebacks regardless of b_dirty_time but it currently isn't. I'm working on a patch to fix it. * But I can't see how the above bug would lead to failure of size sync. One possibility is that wb_has_dirty_io() and/or bdi_has_dirty_io() is getting out of sync for some reason. I'll write up a debug patch for this. Thanks. -- tejun -- To unsubscribe from this list: send the line "unsubscribe linux-fsdevel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
