"First make sure the nfs module is loaded on the client." -> How / how's it called. Can't I assume that it must be loaded if I'm using nfs?
"Then run: sudo sh -c 'echo 32767 >/proc/sys/sunprc/nfs_debug'" -> This gives me a "sh: cannot create /proc/sys/sunprc/nfs_debug: Directory nonexistent" error. I also made a capture with wireshark when reproducing a crash. Now the capture-file has a size of about 160 MB even though I cropped it so that it only contains the data of a few seconds. I guess this is because it cotains the transfered data of the file I tried to copy via NFS before it crashed? Well, it doesn't seem to be the best idea to upload this big file here to the bugtracker, so maybe you can give me some hints for what to search in the capture-file? I noticed that wireshark marked a lot of lines in black and red which are telling in the 'Info' stuff like: "[TCP previous segment lost] [TCP segment of a reassembled PDU]" (very, very much of this type) or "[TCP out-of-order] [TCP segment of a reassembled PDU]" (also quite a lot of those) or "[TCP Previous segment lost] exp2 > nfs [ACK] Seq=217385 Ack=18456889 Win=17077 Len=0 TSV=77576 TSER=372796188" (maybe about 100 of this type) or "[TCP ACKed lost segment] exp2 > nfs [ACK] Seq=354493 Ack=248195985 Win=20672 Len=0 TSV=77917 TSER=372796529" (also quite a lot of those) or "[TCP Retransmission] [TCP segment of a reassembled PDU]" (only a handful of those I think) or "[TCP previous segment lost] Continuation" (maybe about 100 of this type) or "[TCP ACKed lost segment] V3 READ Call, FH:0x53092ff7 Offset:99811328 Len:262144" (only a handful) or "[TCP ACKed lost segment] [TCP Previous segment lost] V3 SETATTR Reply (Call In 115496)" (I think there's only one of those... maybe important?) As I'm not an expert at all, of course this is just a shot in the dark, since I dont' really know what to look for. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/661294 Title: System lock-up when receiving large files (big data amount) from NFS server -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
