On Mon, 2005-05-23 at 20:35 -0400, Trond Myklebust wrote: > ty den 24.05.2005 Klokka 00:47 (+0200) skreiv Kenneth Johansson: > > I have both the server and client running 2.6.11.7 and have some severe > > data corruption when reading from the server (maybe on write also I have > > not tested). > > > > If I copy the data over with scp or ftp I get correct data. Also nfs > > works OK with a mac os x 10.4 client. > > > > Running gen.sh on the server and then cmp.sh on the client results in a > > md5 checksum difference on 5-12 files I have never done one run where > > there was no errors. > > > > This is what cat /proc/mounts reports on the nfs mount > > > > :/export/home/ken /home/ken nfs rw,v3,rsize=32768,wsize=32768,hard,udp,lock,addr=amd 0 0 > > > > I'm seeing no problems at all with this on a loopback mount with > 2.6.12-rc4. Mind giving us some more details on your setup? > > Cheers, > Trond I did some more investigation what type of data error I get and it looks a bit strange. I always get 28 bytes wrong in a sequence some times this is data repeated from previous in the file but not always. Anybody know what cache line size this cpu has? processor : 0 vendor_id : AuthenticAMD cpu family : 6 model : 8 model name : AMD Athlon(TM) XP 2200+ stepping : 0 cpu MHz : 1802.998 cache size : 256 KB fdiv_bug : no hlt_bug : no f00f_bug : no coma_bug : no fpu : yes fpu_exception : yes cpuid level : 1 wp : yes flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 mmx fxsr sse pni syscall mmxext 3dnowext 3dnow bogomips : 3547.13 Here is a sample if three files with errors in them. file 13 "od -Ax -tx1z" -924dc0 df b3 0c 89 2d a2 83 da 1c 08 f2 66 da f6 6b f4 >....-......f..k.< +924dc0 43 11 2a f4 98 09 d5 76 aa 26 83 00 24 3d 11 fd >C.*....v.&..$=..< -924dd0 af c2 44 57 9a 13 01 43 84 bf 99 c3 1b 16 8a 00 >..DW...C........< +924dd0 3e 64 d7 bd 4f 8d 26 cf 4f 4f 2c 62 1b 16 8a 00 >>d..O.&.OO,b....< 28 bytes wrong in a sequence The data is a repeat from previous data in the file. >grep "43 11 2a f4 98 09 d5 76 aa 26 83 00 24 3d 11 fd" 13_org 924d40 43 11 2a f4 98 09 d5 76 aa 26 83 00 24 3d 11 fd >C.*....v.&..$=..< >grep "43 11 2a f4 98 09 d5 76 aa 26 83 00 24 3d 11 fd" 13_err 924d40 43 11 2a f4 98 09 d5 76 aa 26 83 00 24 3d 11 fd >C.*....v.&..$=..< 924dc0 43 11 2a f4 98 09 d5 76 aa 26 83 00 24 3d 11 fd >C.*....v.&..$=..< 924dc0 is a copy of 924d40 128 bytes offset file 14 "od -Ax -tx1z" -0912f0 91 45 bb cd eb 4f 01 d3 69 27 88 b5 7d 7d 17 8d >.E...O..i'..}}..< +0912f0 b8 3f 4e 5d 2e 86 ed c0 51 79 fe ec 3e 53 c9 29 >.?N]....Qy..>S.)< -091300 7d 94 8e f9 81 d0 c2 4a b5 8e c6 af b0 03 4c 16 >}......J......L.< +091300 d9 05 ac 0d fc eb 00 71 17 bd fb 3e b0 03 4c 16 >.......q...>..L.< >grep "b8 3f 4e 5d 2e 86 ed c0 51 79 fe ec 3e 53 c9 29" 14_err 0912b0 b8 3f 4e 5d 2e 86 ed c0 51 79 fe ec 3e 53 c9 29 >.?N]....Qy..>S.)< 0912f0 b8 3f 4e 5d 2e 86 ed c0 51 79 fe ec 3e 53 c9 29 >.?N]....Qy..>S.)< 28 bytes wrong 64 bytes offset file 16 "od -Ax -tx1z" -635200 c3 1d f2 b8 c4 d5 12 c1 3f 48 e6 9d dc 98 1f e5 >........?H......< +635200 c3 1d f2 b8 c4 d5 12 c1 00 10 00 00 00 d0 ec 08 >................< -635210 9e 54 e7 f1 49 5b 1e d0 9f e2 7c 26 24 cb 98 24 >.T..I[....|&$..$< +635210 00 10 00 00 00 90 14 08 00 10 00 00 00 50 25 06 >.............P%.< -635220 25 fc 63 2a bf 07 b4 c0 cf a1 67 9b ef 01 5d 6d >%.c*......g...]m< +635220 00 10 00 00 bf 07 b4 c0 cf a1 67 9b ef 01 5d 6d >..........g...]m< 28 bytes wrong This time the data is not from this file.
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