On Tue, Dec 02, 2008 at 03:58:53PM +0100, Andres Freund wrote: > Ok. The system now runs (without problems) with the patch enabled and I can > get the debug output. > 30 Minutes after boot the system still returns to zero dirty blocks and the > free blocks seem to stay in a sensible range. > I will let it run for a while and report back if either something interesting > happens or the problem reappears and I am seeing no significant amount of dirty > blocks. You say you are using Postgres, right? Something you might try to see if it triggers the problem it is creating a new database and then restoring some database dump/backup into that new database. Some databases expand into a new table space (or whatever terminology Postgres uses) by random writes into a sparse portion of the file. This could be triggering the problem, or at least trigger the problem more quickly. The other thing I wanted to ask is whether "df" was showing the 37% in-use statistic at the time, or was that after you rebooted. And although I hate to ask it, you're sure this isn't the standard "delete an in-use file but not get the space back" Unix trap, right? Thanks, regards, - Ted -- 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
