On Fri, 19 Mar 2010 18:10:38 -0400, Dennis Nezic wrote: > On Fri, 19 Mar 2010 00:27:20 -0400, Dennis Nezic wrote: > > On Fri, 19 Mar 2010 10:21:57 +0800, Bian Naimeng wrote: > > > > After upgrading my server (kernel 2.6.19 to 2.6.33, nfs-utils > > > > 1.1.0 to 1.2.1/1.1.4/1.1.6), and probably other stuff too), and > > > > possibly my client laptop's kernel, I have suddenly started to > > > > get these "server X not responding, timed out" errors (on my > > > > client), especially (only?) when doing large file transfers. > > > > This would lead to input/output errors, and the transfers would > > > > fail. > > > > > > > > I never noticed any such problems for over two years, using the > > > > older versions. The networking (wifi link) hasn't changed. > > > > > > > > Usually the file transfer trips and falls over itself near the > > > > end > > > > -- Ie. it will do 600MB out of 800MB just fine, and then > > > > suddently start giving these "timed out" errors, and then crash > > > > and burn. At this point, I am forced to "umount -fl" the mount. > > > > If I then try to remount it, the server acnowledges my > > > > "authenticated mount requests" perfectly fine, but my client > > > > (laptop) still appears "hung". After a few minutes, I am able > > > > to remount it. > > > > > > > > I tried playing with the rsize/wsize/timeo/retrans variables, > > > > but none of it seemed to fix the problem. > > > > > > > > Any ideas about what has changed? Maybe this is/was a well-known > > > > problem? :P > > > > > > > > > > I do not know the what's the reason. And I am not sure the > > > followed discussion can fix this problem, but maybe it can help > > > you. http://marc.info/?l=linux-nfs&m=123478426412524&w=2 > > > > Both the patches mentioned in that thread already seem to have been > > applied to my kernels. So, although the problem seems related, it > > wasn't that bug in particular. The person in that thread was talking > > about mounts dying after 5-15minutes, which doesn't happen with me > > -- my problem only seems to occur under intense activity. > > Hrm. I just noticed that my scp transfers are stalling -- which also > didn't used to happen before with my old kernel. No error messages. > Ftp transfers work fine. Eek. :S. (Despite the freezing/stalling, my > *actual* network connection works perfectly.) > > Ideas? It seems that changing the mount options from "soft" to "hard" seems to "work" -- at least the transfers eventually finish! Although there are still stalls of 6-8minutes ... between the 16 syslog error messages: "nfs: server XYZ not responding, still trying" and the 16 subsequent error messages: "nfs: server XYZ OK". The key difference being that with "hard", it is "still trying" rather than "timed out". Now why is it stalling for so long? -- 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
