[Linux-cachefs] Issues

Wed Jun 3 14:50:49 UTC 2009

David Howells wrote:
> David Howells <dhowells at redhat.com> wrote:
>
>   
>> I'm fairly certain this is the problem.  You can try what I asked for, but I
>> don't think it's going to show anything useful.
>>     
>
> How about the attached patch?
>
> David
>   

Applied patch and performance is extremely slow 7 mins to copy about 
140MB.  I have tried this against rc6 and rc7 and I see a lot of the 
following messages in dmesg.  Any ideas?  Also the below output is 
everything after the kernel boots normally, and reading from the cache 
is very fast.

[kslowd] cut short 0 to 11bd
[kslowd] cut short 1000 to 11bd
[kslowd] cut short 0 to 1021
[kslowd] cut short 1000 to 1021
[kslowd] cut short 0 to 2d2
[kslowd] cut short 0 to 12cf
[kslowd] cut short 1000 to 12cf
[kslowd] cut short 0 to 1f7
[kslowd] cut short 0 to 820
[kslowd] cut short 0 to 5fc
[kslowd] cut short 0 to 519
[kslowd] cut short 0 to f808
[kslowd] cut short 1000 to f808
[kslowd] cut short 2000 to f808
[kslowd] cut short 3000 to f808
[kslowd] cut short 4000 to f808
[kslowd] cut short 5000 to f808
[kslowd] cut short 6000 to f808
[kslowd] cut short 7000 to f808
[kslowd] cut short 8000 to f808
[kslowd] cut short 9000 to f808
[kslowd] cut short a000 to f808
[kslowd] cut short b000 to f808
[kslowd] cut short c000 to f808
[kslowd] cut short d000 to f808
[kslowd] cut short e000 to f808
[kslowd] cut short f000 to f808
[kslowd] cut short 0 to 2a73
[kslowd] cut short 1000 to 2a73
[kslowd] cut short 2000 to 2a73
[kslowd] cut short 0 to 9f
[kslowd] cut short 0 to 167
[kslowd] cut short 0 to 120
[kslowd] cut short 0 to a4
[kslowd] cut short 0 to 12d
[kslowd] cut short 0 to 442
[kslowd] cut short 0 to d9
[kslowd] cut short 0 to 129c0
[kslowd] cut short 1000 to 129c0
[kslowd] cut short 2000 to 129c0
[kslowd] cut short 3000 to 129c0
[kslowd] cut short 4000 to 129c0
[kslowd] cut short 5000 to 129c0
[kslowd] cut short 6000 to 129c0
[kslowd] cut short 7000 to 129c0
[kslowd] cut short 8000 to 129c0
[kslowd] cut short 9000 to 129c0
[kslowd] cut short a000 to 129c0
[kslowd] cut short b000 to 129c0
[kslowd] cut short c000 to 129c0
[kslowd] cut short d000 to 129c0
[kslowd] cut short e000 to 129c0
[kslowd] cut short f000 to 129c0
[kslowd] cut short 10000 to 129c0
[kslowd] cut short 11000 to 129c0
[kslowd] cut short 12000 to 129c0
[kslowd] cut short 0 to 50748
[kslowd] cut short 1000 to 50748
[kslowd] cut short 2000 to 50748
[kslowd] cut short 3000 to 50748
[kslowd] cut short 4000 to 50748
[kslowd] cut short 5000 to 50748
[kslowd] cut short 6000 to 50748
[kslowd] cut short 7000 to 50748
[kslowd] cut short 8000 to 50748
[kslowd] cut short 9000 to 50748
[kslowd] cut short a000 to 50748
[kslowd] cut short b000 to 50748
[kslowd] cut short c000 to 50748
[kslowd] cut short d000 to 50748
[kslowd] cut short e000 to 50748
[kslowd] cut short f000 to 50748
[kslowd] cut short 10000 to 50748
[kslowd] cut short 11000 to 50748
[kslowd] cut short 12000 to 50748
[kslowd] cut short 13000 to 50748
[kslowd] cut short 14000 to 50748
[kslowd] cut short 15000 to 50748
[kslowd] cut short 16000 to 50748
[kslowd] cut short 17000 to 50748
[kslowd] cut short 18000 to 50748
[kslowd] cut short 19000 to 50748
[kslowd] cut short 1a000 to 50748
[kslowd] cut short 1b000 to 50748
[kslowd] cut short 1c000 to 50748
[kslowd] cut short 1d000 to 50748
[kslowd] cut short 1e000 to 50748
[kslowd] cut short 1f000 to 50748
[kslowd] cut short 20000 to 50748
[kslowd] cut short 21000 to 50748
[kslowd] cut short 22000 to 50748
[kslowd] cut short 23000 to 50748
[kslowd] cut short 24000 to 50748
[kslowd] cut short 25000 to 50748
[kslowd] cut short 26000 to 50748
[kslowd] cut short 27000 to 50748
[kslowd] cut short 28000 to 50748
[kslowd] cut short 29000 to 50748
[kslowd] cut short 2a000 to 50748
[kslowd] cut short 2b000 to 50748
[kslowd] cut short 2c000 to 50748
[kslowd] cut short 2d000 to 50748
[kslowd] cut short 2e000 to 50748
[kslowd] cut short 2f000 to 50748
[kslowd] cut short 30000 to 50748
[kslowd] cut short 31000 to 50748
[kslowd] cut short 32000 to 50748
[kslowd] cut short 33000 to 50748
[kslowd] cut short 34000 to 50748
[kslowd] cut short 35000 to 50748
[kslowd] cut short 36000 to 50748
[kslowd] cut short 37000 to 50748
[kslowd] cut short 38000 to 50748
[kslowd] cut short 39000 to 50748
[kslowd] cut short 3a000 to 50748
[kslowd] cut short 3b000 to 50748
[kslowd] cut short 3c000 to 50748
[kslowd] cut short 3d000 to 50748
[kslowd] cut short 3e000 to 50748
[kslowd] cut short 3f000 to 50748
[kslowd] cut short 40000 to 50748
[kslowd] cut short 41000 to 50748
[kslowd] cut short 42000 to 50748
[kslowd] cut short 43000 to 50748
[kslowd] cut short 44000 to 50748
[kslowd] cut short 45000 to 50748
[kslowd] cut short 46000 to 50748
[kslowd] cut short 47000 to 50748
[kslowd] cut short 48000 to 50748
[kslowd] cut short 49000 to 50748
[kslowd] cut short 4a000 to 50748
[kslowd] cut short 4b000 to 50748
[kslowd] cut short 4c000 to 50748
[kslowd] cut short 4d000 to 50748
[kslowd] cut short 4e000 to 50748
[kslowd] cut short 4f000 to 50748
[kslowd] cut short 50000 to 50748
[kslowd] cut short 0 to 47c
[kslowd] cut short 0 to 4a8
[kslowd] cut short 0 to 2e6
[kslowd] cut short 0 to 314
[kslowd] cut short 0 to 8a7
[kslowd] cut short 0 to 5b50
[kslowd] cut short 1000 to 5b50
[kslowd] cut short 2000 to 5b50
[kslowd] cut short 3000 to 5b50
[kslowd] cut short 4000 to 5b50
[kslowd] cut short 5000 to 5b50
[kslowd] cut short 0 to 114
[kslowd] cut short 0 to 202
[kslowd] cut short 0 to 9
[kslowd] cut short 0 to 561
[kslowd] cut short 0 to 34cf
[kslowd] cut short 1000 to 34cf
[kslowd] cut short 2000 to 34cf
[kslowd] cut short 3000 to 34cf
[kslowd] cut short 0 to 25f
[kslowd] cut short 0 to b948
[kslowd] cut short 1000 to b948
[kslowd] cut short 2000 to b948
[kslowd] cut short 3000 to b948
[kslowd] cut short 4000 to b948
[kslowd] cut short 5000 to b948
[kslowd] cut short 6000 to b948
[kslowd] cut short 7000 to b948
[kslowd] cut short 8000 to b948
[kslowd] cut short 9000 to b948
[kslowd] cut short a000 to b948
[kslowd] cut short b000 to b948
[kslowd] cut short 0 to 285aa
[kslowd] cut short 1000 to 285aa
[kslowd] cut short 2000 to 285aa
[kslowd] cut short 3000 to 285aa
[kslowd] cut short 4000 to 285aa
[kslowd] cut short 5000 to 285aa
[kslowd] cut short 6000 to 285aa
[kslowd] cut short 7000 to 285aa
[kslowd] cut short 8000 to 285aa
[kslowd] cut short 9000 to 285aa
[kslowd] cut short a000 to 285aa
[kslowd] cut short b000 to 285aa
[kslowd] cut short 14000 to 285aa
[kslowd] cut short 15000 to 285aa
[kslowd] cut short 16000 to 285aa
[kslowd] cut short 17000 to 285aa
[kslowd] cut short 18000 to 285aa
[kslowd] cut short 19000 to 285aa
[kslowd] cut short 1a000 to 285aa
[kslowd] cut short 1b000 to 285aa
[kslowd] cut short 1c000 to 285aa
[kslowd] cut short 1d000 to 285aa
[kslowd] cut short 1e000 to 285aa
[kslowd] cut short 1f000 to 285aa
[kslowd] cut short 20000 to 285aa
[kslowd] cut short 21000 to 285aa
[kslowd] cut short 22000 to 285aa
[kslowd] cut short 23000 to 285aa
[kslowd] cut short 24000 to 285aa
[kslowd] cut short 25000 to 285aa
[kslowd] cut short 26000 to 285aa
[kslowd] cut short 27000 to 285aa
[kslowd] cut short 28000 to 285aa
[kslowd] cut short c000 to 285aa
[kslowd] cut short d000 to 285aa
[kslowd] cut short e000 to 285aa
[kslowd] cut short f000 to 285aa
[kslowd] cut short 10000 to 285aa
[kslowd] cut short 11000 to 285aa
[kslowd] cut short 12000 to 285aa
[kslowd] cut short 13000 to 285aa
[kslowd] cut short 0 to 267
[kslowd] cut short 0 to 6bb7a
[kslowd] cut short 1000 to 6bb7a
[kslowd] cut short 2000 to 6bb7a
[kslowd] cut short 3000 to 6bb7a
[kslowd] cut short 4000 to 6bb7a
[kslowd] cut short 5000 to 6bb7a
[kslowd] cut short 6000 to 6bb7a
[kslowd] cut short 7000 to 6bb7a
[kslowd] cut short 8000 to 6bb7a
[kslowd] cut short 9000 to 6bb7a
[kslowd] cut short a000 to 6bb7a
[kslowd] cut short b000 to 6bb7a
[kslowd] cut short c000 to 6bb7a
[kslowd] cut short d000 to 6bb7a
[kslowd] cut short e000 to 6bb7a
[kslowd] cut short f000 to 6bb7a
[kslowd] cut short 10000 to 6bb7a
[kslowd] cut short 11000 to 6bb7a
[kslowd] cut short 12000 to 6bb7a
[kslowd] cut short 13000 to 6bb7a
[kslowd] cut short 14000 to 6bb7a
[kslowd] cut short 15000 to 6bb7a
[kslowd] cut short 16000 to 6bb7a
[kslowd] cut short 17000 to 6bb7a
[kslowd] cut short 18000 to 6bb7a
[kslowd] cut short 19000 to 6bb7a
[kslowd] cut short 1a000 to 6bb7a
[kslowd] cut short 1b000 to 6bb7a
[kslowd] cut short 24000 to 6bb7a
[kslowd] cut short 25000 to 6bb7a
[kslowd] cut short 26000 to 6bb7a
[kslowd] cut short 27000 to 6bb7a
[kslowd] cut short 28000 to 6bb7a
[kslowd] cut short 29000 to 6bb7a
[kslowd] cut short 2a000 to 6bb7a
[kslowd] cut short 2b000 to 6bb7a
[kslowd] cut short 2c000 to 6bb7a
[kslowd] cut short 2d000 to 6bb7a
[kslowd] cut short 2e000 to 6bb7a
[kslowd] cut short 2f000 to 6bb7a
[kslowd] cut short 30000 to 6bb7a
[kslowd] cut short 31000 to 6bb7a
[kslowd] cut short 32000 to 6bb7a
[kslowd] cut short 33000 to 6bb7a
[kslowd] cut short 1c000 to 6bb7a
[kslowd] cut short 1d000 to 6bb7a
[kslowd] cut short 1e000 to 6bb7a
[kslowd] cut short 1f000 to 6bb7a
[kslowd] cut short 20000 to 6bb7a
[kslowd] cut short 21000 to 6bb7a
[kslowd] cut short 22000 to 6bb7a
[kslowd] cut short 23000 to 6bb7a
[kslowd] cut short 3c000 to 6bb7a
[kslowd] cut short 3d000 to 6bb7a
[kslowd] cut short 3e000 to 6bb7a
[kslowd] cut short 3f000 to 6bb7a
[kslowd] cut short 40000 to 6bb7a
[kslowd] cut short 34000 to 6bb7a
[kslowd] cut short 35000 to 6bb7a
[kslowd] cut short 36000 to 6bb7a
[kslowd] cut short 37000 to 6bb7a
[kslowd] cut short 38000 to 6bb7a
[kslowd] cut short 39000 to 6bb7a
[kslowd] cut short 3a000 to 6bb7a
[kslowd] cut short 3b000 to 6bb7a
[kslowd] cut short 41000 to 6bb7a
[kslowd] cut short 42000 to 6bb7a
[kslowd] cut short 43000 to 6bb7a
[kslowd] cut short 44000 to 6bb7a
[kslowd] cut short 45000 to 6bb7a
[kslowd] cut short 46000 to 6bb7a
[kslowd] cut short 47000 to 6bb7a
[kslowd] cut short 48000 to 6bb7a
[kslowd] cut short 49000 to 6bb7a
[kslowd] cut short 4a000 to 6bb7a
[kslowd] cut short 4b000 to 6bb7a
[kslowd] cut short 4c000 to 6bb7a
[kslowd] cut short 4d000 to 6bb7a
[kslowd] cut short 4e000 to 6bb7a
[kslowd] cut short 4f000 to 6bb7a
[kslowd] cut short 50000 to 6bb7a
[kslowd] cut short 51000 to 6bb7a
[kslowd] cut short 52000 to 6bb7a
[kslowd] cut short 53000 to 6bb7a
[kslowd] cut short 54000 to 6bb7a
[kslowd] cut short 55000 to 6bb7a
[kslowd] cut short 56000 to 6bb7a
[kslowd] cut short 57000 to 6bb7a
[kslowd] cut short 58000 to 6bb7a
[kslowd] cut short 59000 to 6bb7a
[kslowd] cut short 5a000 to 6bb7a
[kslowd] cut short 5b000 to 6bb7a
[kslowd] cut short 5c000 to 6bb7a
[kslowd] cut short 5d000 to 6bb7a
[kslowd] cut short 5e000 to 6bb7a
[kslowd] cut short 5f000 to 6bb7a
[kslowd] cut short 60000 to 6bb7a
[kslowd] cut short 61000 to 6bb7a
[kslowd] cut short 62000 to 6bb7a
[kslowd] cut short 63000 to 6bb7a
[kslowd] cut short 64000 to 6bb7a
[kslowd] cut short 65000 to 6bb7a