Hi Trond, On Mon, Oct 26, 2009 at 1:19 PM, Trond Myklebust <Trond.Myklebust@xxxxxxxxxx> wrote: > On Sun, 2009-10-25 at 23:31 +0000, Daniel J Blueman wrote: >> Since 2.6.30-rc, I've been experiencing various issues relating to >> getcwd() returning ENOENT on NFS4 clients. I used an over-complicated >> but reliable reproducer [1] (on Karmic RC against a 2.6.32-rc5 NFS4 >> server) to bisect [2]. >> >> The impact of this regression is moderate (side-effects range from >> benign to failure), so we should get a fix into 2.6.32 if at all >> possible and strongly consider a 2.6.31 stable update. >> >> Thanks, >> Daniel >> >> --- [1] >> >> $ apt-get source apt >> $ cd apt-* >> $ ./configure && make >> [snip] >> sh: getcwd() failed: No such file or directory >> >> --- [2] >> >> a65318bf3afc93ce49227e849d213799b072c5fd is first bad commit >> commit a65318bf3afc93ce49227e849d213799b072c5fd >> Author: Trond Myklebust <Trond.Myklebust@xxxxxxxxxx> >> Date: Wed Mar 11 14:10:28 2009 -0400 >> >> NFSv4: Simplify some cache consistency post-op GETATTRs > > I'm having a lot of trouble seeing how this patch could result in > ENOENT. All it should be doing is reducing the frequency with which we > update some of the inode metadata. > > Have you ever been able to capture one of these errors using strace? Backing this patch out by hand against stock 2.6.32-rc5 (w/ 2.6.32-rc5 on server) corrects the behaviour. It's readily reproducible [1]; using 2.6.30, the issue is not seen, thus is a regression. To observe the change to user-level behaviour (after the reproducer commands): # make clean # strace -ffe getcwd make -n >list [pid 3829] getcwd(0x7fffa269a380, 4096) = -1 ENOENT (No such file or directory) make: getcwd: No such file or directory Would this help for me to log this via a bugzilla.kernel.org ticket? Thanks, Daniel --- [1] booting eg: http://mira.sunsite.utk.edu/ubuntu-releases/karmic/ubuntu-9.10-desktop-amd64.iso $ sudo bash # apt-get install build-essential # apt-get build-dep apt # mount server:/ /mnt -tnfs4 && cd /mnt # apt-get source apt # cd apt-0.7.23.1ubuntu2 # ./configure && make -> "getcwd: No such file or directory" messages observed with cited patch and not without -- Daniel J Blueman -- To unsubscribe from this list: send the line "unsubscribe linux-nfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
