yzb3@xxxxx <yzb3@xxxxx> schrieb: > I recently noticed that my boot has become slower - it took around 29s, > while at the beginning it was ~6s. I thought it was an issue with systemd, > because it failed to properly indicate at which stage the slowdown > occurred and how long it took. I rolled back to a pretty fresh root > subvolume and the boot was fast again. However, after several reboots it > started lagging again (10s? preposterous!). I decided to try the > *clear_cache* mount option; it was only a guess, but it did speed the boot > to the proper ~6s. > > The question is - why? My filesystem is really small - I see no reason for > a 5x boot slowdown. Is this a known issue? I will be glad to give any > additional details about my fs. I'm using a similar setup (although my btrfs rootfs is a 3 disk array and is more or less huge) and I didn't see such a vast boot slowdown. Did you check that systemd is actually using the readahead services which will relocate and defragment your boot files automatically? HTH Kai -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
