Here's tshark output from around the dodgy point. There's a huge gap from 23.440722 to 60.461998 which is devoid of NFS ops. I've inserted a couple of blank lines to delineate the section. At this point, the NFS client starts churning out a huge slew of DELEGRETURN ops. My test case is just tar'ing up a compiled kernel tree over NFS. The output of tar goes through a throughtput monitor and thence to /dev/null: nice -n 30 tar cf - /warthog/fs/linux-2.6-fscache | /tmp/progress >/dev/null Note that the tshark command excluded ssh traffic from the client. I wonder, is it spending this time scanning the delegations to decide what to return? David --- 103565 23.392234 90.155.74.21 -> 90.155.74.18 NFS 330 V4 Call OPEN DH: 0xe7d8aba6/bottom 103566 23.392318 90.155.74.18 -> 90.155.74.21 NFS 414 V4 Reply (Call In 103565) OPEN StateID: 0x8d1c 103567 23.392862 90.155.74.21 -> 90.155.74.18 NFS 262 V4 Call READ StateID: 0x8d1c Offset: 0 Len: 41 103568 23.392908 90.155.74.18 -> 90.155.74.21 NFS 174 V4 Reply (Call In 103567) READ 103569 23.400370 90.155.74.21 -> 90.155.74.18 NFS 178 V4 Call RENEW CID: 0x21ff 103570 23.400402 90.155.74.18 -> 90.155.74.21 NFS 114 V4 Reply (Call In 103569) RENEW 103571 23.400610 90.155.74.21 -> 90.155.74.18 NFS 246 V4 Call GETATTR FH: 0xe7d8aba6 103572 23.400644 90.155.74.18 -> 90.155.74.21 NFS 258 V4 Reply (Call In 103571) GETATTR 103573 23.400859 90.155.74.21 -> 90.155.74.18 TCP 66 803→2049 [ACK] Seq=8062089 Ack=47346145 Win=11449 Len=0 TSval=2028290 TSecr=781547240 103574 23.401176 90.155.74.21 -> 90.155.74.18 NFS 270 V4 Call CLOSE StateID: 0x8d1c 103575 23.401212 90.155.74.18 -> 90.155.74.21 NFS 202 V4 Reply (Call In 103574) CLOSE 103576 23.401852 90.155.74.21 -> 90.155.74.18 NFS 254 V4 Call ACCESS FH: 0xe7d8aba6, [Check: RD MD XT XE] 103577 23.401888 90.155.74.18 -> 90.155.74.21 NFS 194 V4 Reply (Call In 103576) ACCESS, [Access Denied: XE], [Allowed: RD MD XT] 103578 23.440722 90.155.74.21 -> 90.155.74.18 TCP 66 803→2049 [ACK] Seq=8062481 Ack=47346409 Win=11449 Len=0 TSval=2028300 TSecr=781547242 103579 33.775771 fe80::96de:80ff:feb4:ecc3 -> 2001:8b0:194:0:216:76ff:fece:3a3c ICMPv6 86 Neighbor Solicitation for 2001:8b0:194:0:216:76ff:fece:3a3c from 94:de:80:b4:ec:c3 103580 33.776256 2001:8b0:194:0:216:76ff:fece:3a3c -> fe80::96de:80ff:feb4:ecc3 ICMPv6 78 Neighbor Advertisement 2001:8b0:194:0:216:76ff:fece:3a3c (sol) 103581 59.679778 fe80::96de:80ff:feb4:ecc3 -> 2001:8b0:194:0:216:76ff:fece:3a3c ICMPv6 86 Neighbor Solicitation for 2001:8b0:194:0:216:76ff:fece:3a3c from 94:de:80:b4:ec:c3 103582 59.680047 2001:8b0:194:0:216:76ff:fece:3a3c -> fe80::96de:80ff:feb4:ecc3 ICMPv6 78 Neighbor Advertisement 2001:8b0:194:0:216:76ff:fece:3a3c (sol) 103583 60.461998 90.155.74.21 -> 90.155.74.18 NFS 266 V4 Call DELEGRETURN StateID: 0x5e92 103584 60.462196 90.155.74.18 -> 90.155.74.21 NFS 186 V4 Reply (Call In 103583) DELEGRETURN 103585 60.462415 90.155.74.21 -> 90.155.74.18 TCP 66 803→2049 [ACK] Seq=8062681 Ack=47346529 Win=11449 Len=0 TSval=2037555 TSecr=781584302 103586 60.529223 90.155.74.21 -> 90.155.74.18 NFS 334 V4 Call OPEN DH: 0xe7d8aba6/authemail 103587 60.529266 90.155.74.21 -> 90.155.74.18 NFS 266 V4 Call DELEGRETURN StateID: 0x0a42 103588 60.529276 90.155.74.21 -> 90.155.74.18 NFS 266 V4 Call DELEGRETURN StateID: 0x39f2 103589 60.529395 90.155.74.21 -> 90.155.74.18 NFS 266 V4 Call DELEGRETURN StateID: 0x1540 103590 60.529418 90.155.74.21 -> 90.155.74.18 NFS 266 V4 Call DELEGRETURN StateID: 0x26f0 103591 60.529442 90.155.74.18 -> 90.155.74.21 TCP 66 2049→803 [ACK] Seq=47346529 Ack=8063349 Win=32885 Len=0 TSval=781584369 TSecr=2037572 103592 60.529500 90.155.74.18 -> 90.155.74.21 NFS 186 V4 Reply (Call In 103587) DELEGRETURN 103593 60.529593 90.155.74.21 -> 90.155.74.18 NFS 266 V4 Call DELEGRETURN StateID: 0x7220 103594 60.529614 90.155.74.21 -> 90.155.74.18 NFS 266 V4 Call DELEGRETURN StateID: 0x4190 103595 60.529621 90.155.74.21 -> 90.155.74.18 NFS 266 V4 Call DELEGRETURN StateID: 0xdb80 103596 60.529650 90.155.74.18 -> 90.155.74.21 NFS 654 V4 Reply (Call In 103588) DELEGRETURN ; V4 Reply (Call In 103586) OPEN StateID: 0x8d1c ; V4 Reply (Call In 103589) DELEGRETURN 103597 60.529676 90.155.74.21 -> 90.155.74.18 NFS 266 V4 Call DELEGRETURN StateID: 0xe830 103598 60.529685 90.155.74.21 -> 90.155.74.18 TCP 66 803→2049 [ACK] Seq=8064549 Ack=47346649 Win=11449 Len=0 TSval=2037572 TSecr=781584369 103599 60.529700 90.155.74.18 -> 90.155.74.21 NFS 306 V4 Reply (Call In 103593) DELEGRETURN ; V4 Reply (Call In 103590) DELEGRETURN 103600 60.529839 90.155.74.18 -> 90.155.74.21 NFS 426 V4 Reply (Call In 103594) DELEGRETURN ; V4 Reply (Call In 103595) DELEGRETURN ; V4 Reply (Call In 103597) DELEGRETURN 103601 60.529993 90.155.74.21 -> 90.155.74.18 NFS 266 V4 Call DELEGRETURN StateID: 0xbce0 103602 60.530022 90.155.74.21 -> 90.155.74.18 NFS 266 V4 Call DELEGRETURN StateID: 0x8f50 103603 60.530065 90.155.74.21 -> 90.155.74.18 TCP 66 803→2049 [ACK] Seq=8064949 Ack=47347837 Win=11449 Len=0 TSval=2037572 TSecr=781584369 103604 60.530109 90.155.74.18 -> 90.155.74.21 TCP 66 2049→803 [ACK] Seq=47347837 Ack=8064949 Win=32885 Len=0 TSval=781584370 TSecr=2037572 103605 60.530146 90.155.74.18 -> 90.155.74.21 NFS 186 V4 Reply (Call In 103601) DELEGRETURN 103606 60.530256 90.155.74.21 -> 90.155.74.18 NFS 266 V4 Call DELEGRETURN StateID: 0x80d1 103607 60.530271 90.155.74.21 -> 90.155.74.18 NFS 266 V4 Call DELEGRETURN StateID: 0xb361 103608 60.530277 90.155.74.21 -> 90.155.74.18 NFS 266 V4 Call DELEGRETURN StateID: 0xe7b1 103609 60.530305 90.155.74.18 -> 90.155.74.21 NFS 186 V4 Reply (Call In 103602) DELEGRETURN 103610 60.530442 90.155.74.21 -> 90.155.74.18 NFS 266 V4 Call DELEGRETURN StateID: 0xd401 103611 60.530453 90.155.74.21 -> 90.155.74.18 NFS 266 V4 Call DELEGRETURN StateID: 0x4e11 103612 60.530463 90.155.74.18 -> 90.155.74.21 NFS 426 V4 Reply (Call In 103607) DELEGRETURN ; V4 Reply (Call In 103606) DELEGRETURN ; V4 Reply (Call In 103608) DELEGRETURN 103613 60.530509 90.155.74.18 -> 90.155.74.21 NFS 186 V4 Reply (Call In 103610) DELEGRETURN 103614 60.530639 90.155.74.21 -> 90.155.74.18 NFS 266 V4 Call DELEGRETURN StateID: 0x7da1 103615 60.530651 90.155.74.21 -> 90.155.74.18 NFS 266 V4 Call DELEGRETURN StateID: 0x2971 103616 60.530664 90.155.74.18 -> 90.155.74.21 NFS 186 V4 Reply (Call In 103611) DELEGRETURN 103617 60.530669 90.155.74.21 -> 90.155.74.18 NFS 266 V4 Call DELEGRETURN StateID: 0x1ac1 103618 60.530717 90.155.74.21 -> 90.155.74.18 TCP 66 803→2049 [ACK] Seq=8066549 Ack=47348557 Win=11449 Len=0 TSval=2037572 TSecr=781584370 103619 60.530731 90.155.74.18 -> 90.155.74.21 NFS 186 V4 Reply (Call In 103615) DELEGRETURN 103620 60.530910 90.155.74.18 -> 90.155.74.21 NFS 306 V4 Reply (Call In 103617) DELEGRETURN ; V4 Reply (Call In 103614) DELEGRETURN 103621 60.531059 90.155.74.21 -> 90.155.74.18 NFS 266 V4 Call DELEGRETURN StateID: 0x7015 103622 60.531092 90.155.74.21 -> 90.155.74.18 NFS 266 V4 Call DELEGRETURN StateID: 0x43a5 103623 60.531100 90.155.74.21 -> 90.155.74.18 NFS 266 V4 Call DELEGRETURN StateID: 0x1775 103624 60.531159 90.155.74.18 -> 90.155.74.21 NFS 186 V4 Reply (Call In 103622) DELEGRETURN 103625 60.531314 90.155.74.21 -> 90.155.74.18 NFS 266 V4 Call DELEGRETURN StateID: 0x24c5 103626 60.531342 90.155.74.21 -> 90.155.74.18 NFS 266 V4 Call DELEGRETURN StateID: 0xbed5 103627 60.531362 90.155.74.18 -> 90.155.74.21 NFS 306 V4 Reply (Call In 103621) DELEGRETURN ; V4 Reply (Call In 103623) DELEGRETURN 103628 60.531368 90.155.74.21 -> 90.155.74.18 NFS 266 V4 Call DELEGRETURN StateID: 0x8d65 103629 60.531408 90.155.74.18 -> 90.155.74.21 NFS 186 V4 Reply (Call In 103625) DELEGRETURN 103630 60.531512 90.155.74.21 -> 90.155.74.18 NFS 266 V4 Call DELEGRETURN StateID: 0xd9b5 103631 60.531543 90.155.74.21 -> 90.155.74.18 NFS 266 V4 Call DELEGRETURN StateID: 0xea05 103632 60.531549 90.155.74.21 -> 90.155.74.18 NFS 262 V4 Call READ StateID: 0x8d1c Offset: 0 Len: 19 103633 60.531570 90.155.74.21 -> 90.155.74.18 TCP 66 803→2049 [ACK] Seq=8068345 Ack=47349517 Win=11449 Len=0 TSval=2037572 TSecr=781584371 103634 60.531589 90.155.74.18 -> 90.155.74.21 NFS 426 V4 Reply (Call In 103626) DELEGRETURN ; V4 Reply (Call In 103628) DELEGRETURN ; V4 Reply (Call In 103630) DELEGRETURN 103635 60.531636 90.155.74.18 -> 90.155.74.21 NFS 150 V4 Reply (Call In 103632) READ 103636 60.531832 90.155.74.21 -> 90.155.74.18 NFS 266 V4 Call DELEGRETURN StateID: 0xe584 103637 60.531862 90.155.74.21 -> 90.155.74.18 NFS 266 V4 Call DELEGRETURN StateID: 0xd634 103638 60.531868 90.155.74.21 -> 90.155.74.18 TCP 66 803→2049 [ACK] Seq=8068745 Ack=47349961 Win=11449 Len=0 TSval=2037572 TSecr=781584371 103639 60.531886 90.155.74.18 -> 90.155.74.21 NFS 186 V4 Reply (Call In 103631) DELEGRETURN 103640 60.532083 90.155.74.18 -> 90.155.74.21 NFS 306 V4 Reply (Call In 103637) DELEGRETURN ; V4 Reply (Call In 103636) DELEGRETURN 103641 60.532098 90.155.74.21 -> 90.155.74.18 NFS 266 V4 Call DELEGRETURN StateID: 0x82e4 103642 60.532108 90.155.74.21 -> 90.155.74.18 NFS 266 V4 Call DELEGRETURN StateID: 0xb154 103643 60.532114 90.155.74.21 -> 90.155.74.18 NFS 266 V4 Call DELEGRETURN StateID: 0x2b44 103644 60.532174 90.155.74.18 -> 90.155.74.21 TCP 66 2049→803 [ACK] Seq=47350321 Ack=8069345 Win=32885 Len=0 TSval=781584372 TSecr=2037572 103645 60.532259 90.155.74.18 -> 90.155.74.21 NFS 426 V4 Reply (Call In 103641) DELEGRETURN ; V4 Reply (Call In 103642) DELEGRETURN ; V4 Reply (Call In 103643) DELEGRETURN 103646 60.532343 90.155.74.21 -> 90.155.74.18 NFS 266 V4 Call DELEGRETURN StateID: 0x18f4 103647 60.532358 90.155.74.21 -> 90.155.74.18 NFS 266 V4 Call DELEGRETURN StateID: 0x4c24 103648 60.532400 90.155.74.18 -> 90.155.74.21 TCP 66 2049→803 [ACK] Seq=47350681 Ack=8069745 Win=32885 Len=0 TSval=781584372 TSecr=2037572 -- 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
