Messages in this thread | | | Date | Sun, 14 Apr 2002 21:40:58 +0200 | From | Pavel Machek <> | Subject | Re: faster boots? |
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Hi!
> > > while :; do cat /proc/stat; sleep 1; done > > > > > > Then I see a few writes have occurred at nearly every iteration. I > > > think that is due to the atime updates, because using "noatime" there > > > are no writes at most iterations. > > > > Well, that's no problem. noflushd stops kflushd, so it should work > > even with atime. [It works for me with atimes!] > > > > > But more interesting: I only see those few-per-second atime writes while > > > noflushd is running. If I kill noflushd then they go away. > > > > ? > > Another curious thing: even if the regular writes were caused by atime > updates, there is no reason for them to be flushed every second, is > there? > > Yet the hard disk light flashes about once per second when (a) running > the above shell line and (b) running noflushd, and (c) _not_ using > "noatime" (just "nodiratime"). (Remove any of those and it stops). And > /proc/stat shows writes happening. > > This is on ext3. I wonder if journalling is causing a problem. Pavel, > are you running ext3?
No, plain old ext2. Yep, ext3 could have some strange interactions with noflushd. Pavel -- Casualities in World Trade Center: ~3k dead inside the building, cryptography in U.S.A. and free speech in Czech Republic. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.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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