Re: [PATCH]: Option to run cache reap in thread mode

[Dimitri Sivanich]

> 
> I'll write something:
> - allow to disable the DMA kmalloc caches for archs that do not need them.
> - increase the timer frequency and scan only a few caches in each timer.
> - perhaps a quicker test for cache_reap to notice that nothing needs to 
> be done. Right now four tests are done (!flags & _NO_REAP, 
> ac->touched==0, ac->avail != 0, global timer not yet expired). It's 
> possible to skip some tests. e.g. move the _NO_REAP caches on a separate 
> list, replace the time_after(.next_reap,jiffies) with a separate timer.
> 
> --
>     Manfred
>
Thanks for addressing this.  Sounds like some good improvements overall.

One question though:  What about possible spinlock contention issues in the
cache_reap timer processing, or is that unlikely here (even on a heavily loaded
system with a large number of CPUs)?

Dimitri Sivanich <sivanich@xxxxxxx>
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