Am Donnerstag, 6. Dezember 2012 schrieb Marc MERLIN: > On Wed, Dec 05, 2012 at 11:56:27PM -0500, Sylvain Alain wrote: > > Hi everyone, I'm running btrfs since octobre 2012 and I would like to > > understand 2 behavior that I noticed. > > > > 1. When I delete a big directory, sometimes it can hang my box for 1 > > minutes or so, it seems that's the btrfs lock my SSD. > > Doesn't directly answer your question, but if you don't have discard as a > mount option, you should try that. > > Which SSD do you have? Do normal big file writes succeed or hang too? > > My guess right now is that you don't have discard, and your drive is doing > very slow garbage collection. I had a Crucial C300 that did just that before > it ate itself and my data a month later. > Also check that your drive does not have a firmware update to remove those > hangs.
Maybe also the drive does slow trims, but I doubt an Intel SSD 520 would fall into that category. In case you want to try out Sylvain, mount *without* discard option, and run fstrim manually or by cron job from time to time. Ciao, -- Martin 'Helios' Steigerwald - http://www.Lichtvoll.de GPG: 03B0 0D6C 0040 0710 4AFA B82F 991B EAAC A599 84C7 -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
