Hey, I wouldn't neccessarily say this is a btrfs specific problem. I'm experiencing the same issues in a very similar setup (Also using Arch Linux, booting to multi-user.target with systemd and starting X manually, also using the i3 window manager) and I'm using ext4 for the root partition.
Best, Lukas On 07/20/2013 05:15 PM, Jason Russell wrote: > Hi, > > I've been using btrfs for my root partition for about a month on > archlinux and recently Ive started using the i3 window manager and > starting X manually and I now boot to run level 3 (multi-user.target > for systemd) and Ive noticed that booting archlinux on a btrfs root, > there is a lot off hdd chatter after the login prompts are displayed, > which doesnt happen with ext4 on root, so I have done some testing and > comparisons. > > I have stripped down two arch installs, one with btrfs root and one > with ext4, (same laptop, same hdd) I removed all packages except for > the base group. On the btrfs root, there is about +- 15 seconds of hdd > chatter and it takes a long time to log in from the prompts, with the > ext4 root, the computer is silent after the prompts pop up and login > is almost instant. The prompts of the two installs pop up at more or > less the same time (+- 3 seconds) but the login on the btrfs root > takes muuch longer than the ext4. > > Ive also noted that this excessive hdd chatter does not occur > immediately after a fresh format with arch on btrfs root. > > Ive made some deductions/assumptions: > This only seems to occur with btrfs roots. > This only happens after some number of reboots OR after the partition > fills up a little bit. > Im pretty sure of ruled out everything except for the filesystem. > > > I have just done two clean installs to more thoroughly compare ext4 > and btrfs roots. So far no excessive hdd chatter from btrfs. > > I have also seen what I have described on two other computers > (different hardware entirely) where there is lots of hdd chatter from > btrfs root, and nothing from ext4. > > Here are two threads: > https://bbs.archlinux.org/viewtopic.php?pid=1117932 > https://bbs.archlinux.org/viewtopic.php?pid=1301684 > > Any ideas? > > Thanks, > > -- > Jason Russell > -- > 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 >
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