On Sun, Sep 07, 2008 at 07:06:08PM +0930, Glen Turner wrote: > Kyle wrote: >> Ok,
[snip] > - use jumbo frames (9000B packet > 8KB disk block, so very efficient) I noticed a lot of people have talked about using large >1500 frames, usually >9k. I had been using jumbo frames for +8 months and I had found it beneficial. But since using 2.6.25 (and now 2.6.26), I have been getting a lot of kernel memory allocation errors, I have been told they where order 2 and not to worry about them. Cause of fragmented swap space (and some other description that I can't remember right now, but the jist being not to worry). I had found that the system behaved a bit slowly/differently after these events. usually brought on by high network load, moving around 40-300G of files, either with scp or nfs. Since turning off jumbo frames - moving back to standard mtu I have not had these ooop's. My question to the list is, do the people who use jumbo frames have you been seeing these errors. 2 of the servers were using forcedeth and I rtl8168B (using the realteck driver). At sites where I haven't used large mtu I have seen the problem. My setup for large mtu, is me just changing the mtu for the interface. I am guessing there is a leak somewhere. Another hicup for this site is it is a mixed mtu site (that fun), I have had to hand code all the relevant mtu and place them in the routing table with ip r add for ipv4 and ipv6. alex [snip] > -- > Glen Turner > -- > SLUG - Sydney Linux User's Group Mailing List - http://slug.org.au/ > Subscription info and FAQs: http://slug.org.au/faq/mailinglists.html > -- "Free societies are hopeful societies. And free societies will be allies against these hateful few who have no conscience, who kill at the whim of a hat." - George W. Bush 09/17/2004 Washington, DC
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