On 2. Jul 2012, at 14:36 , John Baldwin wrote:
> On Sunday, July 01, 2012 8:23:31 am Bjoern A. Zeeb wrote:
>> Hey,
>>
>> hitting this printf in swp_pager_meta_build()
>>
>> if (uma_zone_exhausted(swap_zone)) {
>> printf("swap zone exhausted, increase
>> kern.maxswzone\n");
>> vm_pageout_oom(VM_OOM_SWAPZ);
>> pause("swzonex", 10);
>> } else
>>
>> seems to be an effective way to put the machine into a state of no recovery
>> unless the memory situation would be able to clear itself. Not that it
>> wouldn't
>> otherwise be any better but in addition having a couple of tenthousands of
>> these
>> going to console as well is really not helpful to try to do anything either.
>> Can
>> we make it a log() call or something?
>>
>> /bz
>>
>> PS: I am not sure as I have seen it on someone else's machines and it's
>> probably been ZFS that caused it. I unfortunately neither had a way to
>> get back in or break to a kernel debugger, so information is sparse.
>
> This used to be a silent deadlock before I added the printf() and the call to
> OOM. :-P Do you just want to ratelimit the printf? We have an API to
> ratelimit
> printf's already.
Ratelimit would be fine; I was writing that on the wrong time of the wrong day
to
just get it out; could you do that?
/bz
--
Bjoern A. Zeeb You have to have visions!
It does not matter how good you are. It matters what good you do!
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