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DateMon, 06 Nov 2006 11:07:38 -0500
FromBill Davidsen <>
SubjectRe: Poor NFSv4 first impressions
Daniel J Blueman wrote:
> Jeff Garzik wrote:
>> Being a big user of NFS at home, and a big fan of NFSv4, it was high
>> time that I converted my home network from NFSv3 to NFSv4.
>>
>> Unfortunately applications started breaking left and right.  vim
>> noticeably malfunctioned, trying repeatedly to create a swapfile (sorta
>> like a lockfile).  Mozilla Thunderbird would crash reproducibly whenever
>> it tried anything remotely major with a mailbox, such as compressing
>> folders (removing deleted messages).
> [snip]
> 
> This has all the symptoms to an open EACCES NFSv4 bug in 2.6.18/19.
> This is fixed in:
> 
> http://www.citi.umich.edu/projects/nfsv4/linux/kernel-patches/2.6.19-rc3-2/linux-2.6.19-rc3-CITI_NFS4_ALL-2.diff 
> 
> (see http://www.citi.umich.edu/projects/nfsv4/linux/).
> 
> With this patch, I can run just great with NFSv4 home dir (etc)
> mounts; without, I get the symptom of many 0-byte temporary/lock files
> being created and often the inability to create files (!). Be sure to
> allow callback delegation connections in through your firewall for the
> extra performance ;-) .
> 
> Maybe it's too late for these fixes 2.6.19, but they should certainly
> make 2.6.19.1 IMHO.

If NFSv4 really works that poorly without the patches, perhaps they 
should go in 2.6.19 at the start. I'm surprised others aren't having 
this problem, I thought there was more test use.


-- 
Bill Davidsen <davidsen@tmr.com>
   Obscure bug of 2004: BASH BUFFER OVERFLOW - if bash is being run by a
normal user and is setuid root, with the "vi" line edit mode selected,
and the character set is "big5," an off-by-one errors occurs during
wildcard (glob) expansion.
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