Messages in this thread | | | From | Ed Tomlinson <> | Subject | Re: i/o wait eating all of CPU on 2.6.1 | Date | Sun, 25 Jan 2004 10:06:05 -0500 |
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Hi,
A couple of things. IO wait does not 'eat cpu'. Its a wait state, recorded when the box has nothing to do and IO is pending. That being said I remember reading here about nfs bugs in 2.6.1 that slow it down. A search should find some patches for you to try.
Ed
On January 25, 2004 09:30 am, Jaakko Helminen wrote: > I have two servers, both of which have more than 300 gigabytes of hard > drive space and those files are made available to the network with samba, > nfs and http and it worked fine with 2.6.0 but when I upgraded to 2.6.1 I > noticed that everything was VERY slow, from a machine that is connected to > the other server with a 100M link, 57kB/s tops. i/o wait eats up all of the > cpu. On the other hand, Apache (and everything else) works very fast when I > only send /dev/zero to a client, since that doesn't need disk operations. > > I don't notice anything suspicious in dmesg but since this happens on two > machines and has only happened when upgraded to 2.6.1, it's most likely > because of 2.6.1. I'm downgrading to 2.6.0 (with mremap-patch) today if I > don't figure out what is wrong. Any ideas? > > And since I'm not subscribed to Linux Kernel Mailing List, please forward > any replies to me. > > > -Jaakko Helminen > > - > 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/ - 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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