Re: deadlock on flt_noram5

[yamt%mwd.biglobe.ne.jp@localhost (YAMAMOTO Takashi)]

hi,

>> db> show uvm
>> Current UVM status:
>>   pagesize=4096 (0x1000), pagemask=0xfff, pageshift=12
>>   63217 VM pages: 37312 active, 18283 inactive, 3084 wired, 1 free
>>   pages  35865 anon, 18751 file, 3808 exec
>>   freemin=256, free-target=341, wired-max=21072
>>   faults=920374, traps=810647, intrs=7767403, ctxswitch=12850739
>>   softint=16186151, syscalls=897784267, swapins=23, swapouts=40
>>   fault counts:
>>     noram=4, noanon=0, pgwait=0, pgrele=0
>>     ok relocks(total)=4706(4711), anget(retrys)=311116(1693), amapcopy=96542
>>     neighbor anon/obj pg=119132/1323748, gets(lock/unlock)=336489/3015
>>     cases: anon=220693, anoncow=36623, obj=275901, prcopy=60586, 
>> przero=315025
>>   daemon and swap counts:
>>     woke=47, revs=33, scans=53717, obscans=81, anscans=33755
>>     busy=0, freed=32656, reactivate=15379, deactivate=87720
>>     pageouts=4244, pending=29740, nswget=1702
>>     nswapdev=2, swpgavail=98303
>>     swpages=98303, swpginuse=33791, swpgonly=30938, paging=1180
> 
> my guess is:
> 
>       - processes, including your file server, are waiting for completion
>         of paging i/o.
> 
>       - paging i/o never completes as they are served by your file server.
> 
> ie. it isn't a new problem.

the problem is not specific to puffs.  see the CAVEATS section of mount_nfs(8).

YAMAMOTO Takashi

> 
> YAMAMOTO Takashi