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SubjectRe: 2.6.1: kernel BUG at mm/swapfile.c:806
Andrew Morton wrote:
> marcel cotta <marcel@kriminell.com> wrote:
>
>>Andrew Morton wrote:
>>
>>>marcel cotta <marcel@kriminell.com> wrote:
>>>
>>>
>>>>i got this oops after the box swapped like crazy under X for about 5
>>>>minutes
>>>>while swapping it was nearly unusable (jerky mouse, console switching
>>>>took 10 seconds)
>>>>the extreme performance drop is always reproducible when swapping starts
>>>>
>>>>
>>>>------------[ cut here ]------------
>>>>kernel BUG at mm/swapfile.c:806!
>>>
>>>
>>>Amazing. Are you using a swapfile, or are you swapping to a block device?
>>>
>>>
>>>
>>>
>>
>>hehe, hasnt been reported for a while eh ;)
>>
>>i used swapfiles, one static 50mb file and the rest in temp 16MB
>>blocks managed by swapd
>
>
> What is `swapd'?
>
>


the box is still running and i just saw another thing

hades:~# cat /proc/swaps
Filename Type Size Used
Priority
/swap/linux0.swp file 14184 14160 -1
/swap/linux1.swp file 16184 16036
-22
/swap/linux2.swp file 16184 15740
-23
/swap/linux3.swp file 16184 15720
-28
/swap/linux4.swp file 16184 15960
-43
/swap/linux5.swp file 16184 13380
-44
/swap/linux6.swp file 16184 104
-45
/swap/linux7.swp file 16184 0
-46
/swap/linux8.swp file 16184 4
-47


hades:~# free
total used free shared buffers cached
Mem: 188724 184076 4648 0 328 33176
-/+ buffers/cache: 150572 38152
Swap: 127476 90528 36948


have a look at the total swap amount, free reports 127476 but the
total should be 143656
the /swap/linux0.swp file being 2mb smaller is no error
it is caused by setting swapfile size in /etc/swapd.conf to 14184,
while only
this file being in use, and restarting swapd with 16184 as new
swapfile size


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