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Date: Sun, 24 Sep 2006 14:53:37 -0700 From: Andrew Morton <akpm@...l.org> To: Tilman Schmidt <tilman@...p.cc> Cc: linux-kernel@...r.kernel.org, Chris Mason <mason@...e.com>, ext2-devel@...ts.sourceforge.net, reiserfs-dev@...esys.com Subject: Re: [2.6.18-rc7-mm1] slow boot On Sun, 24 Sep 2006 18:59:18 +0200 Tilman Schmidt <tilman@...p.cc> wrote: > In the end, the mm kernel has taken twice as much time to get up > and running as the mainline kernel. Don't know, sorry. make-ext3-mount-default-to-barrier=1.patch takes my laptop's bootup time from 53 seconds to 68, which is rather painful. In fact I'm inclined to drop the patch because of this, and I'd also be quite concerned about the similar reiserfs patch, make-reiserfs-default-to-barrier=flush.patch. I've *never* seen any reports of any problems being caused by disk writeback caching. Yes, it's a theoretical problem but for some reason it just doesn't seem to be a problem in practice. Hence I'm really reluctant to go and slow everyone's machines down so much in this manner. But apart from that problem I see no differences in bootup time between 2.6.18 and 2.6.18-mm1. Do you have the time to go through the http://www.zip.com.au/~akpm/linux/patches/stuff/bisecting-mm-trees.txt process? - 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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