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Date: Mon, 11 Oct 2010 11:46:19 -0400 From: Calvin Walton <calvin.walton@...il.com> To: Felipe Contreras <felipe.contreras@...il.com> Cc: Linux Kernel Mailing List <linux-kernel@...r.kernel.org>, linux-btrfs@...r.kernel.org, Chris Mason <chris.mason@...cle.com> Subject: Re: Horrible btrfs performance on cold cache On Mon, 2010-10-11 at 03:30 +0300, Felipe Contreras wrote: > Hi, > > I use btrfs on most of my volumes on my laptop, and I've always felt > booting was very slow, but definitely sure is slow, is starting up > Google Chrome: > > encrypted ext4: ~20s > btrfs: ~2:11s > > I have tried different things to find out exactly what is the issue, > but haven't quite found it yet. If you've been using this volume for a while, it could just have become badly fragmented. You could try btrfs's fancy online defragmentation abilities to see if that'll give you an improvement: # btrfs filesystem defragment /mountpoint/of/volume Let us know if that helps, of course :) -- Calvin Walton <calvin.walton@...il.com> -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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