Messages in this thread | | | Subject | Re: Status of the IO scheduler fixes for 2.4 | From | Chris Mason <> | Date | 03 Jul 2003 08:01:55 -0400 |
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On Thu, 2003-07-03 at 06:58, Stephan von Krawczynski wrote: > On 02 Jul 2003 22:02:07 -0400 > Chris Mason <mason@suse.com> wrote: > > > [...] > > Nick would like to see a better balance of throughput/fairness, I wimped > > out and went for the userspace toggle instead because I think anything > > else requires pulling in larger changes from 2.5 land. > > I have a short question on that: did you check if there are any drawbacks on > network performance through this? We had a phenomenon here with 2.4.21 with > both samba and simple ftp where network performance dropped to a crawl when > simply entering "sync" on the console. Even simple telnet-sessions seemed to be > affected. As we could not create a reproducable setup I did not talk about this > up to now, but I wonder if anyone else ever checked that out ...
It's possible the network programs involved are actually getting stuck in atime updates somewhere. A decoded sysrq-t during one of the stalls would help find the real cause.
-chris
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