Re: swapoff throttling and speedup?

["KAMEZAWA Hiroyuki" <kamezawa.hiroyu@jp.fujitsu.com>]

Hugh Dickins wrote:
> On Wed, 3 Jun 2009, Joel Krauska wrote:
>> I'm hoping others have been down this road before.
>>
>> As a rule, we try to avoid swapping when possible, but using:
>> vm.swappiness = 1
>>
>> But it does still happen on occasion and that lead to this mail.
>
> Thanks for taking the trouble to write: opinions, anyone?
>

Is there anyone who wants a system call like this ?

  int mem_swapin(int pid, start-addr, size)
  - try to swap in pages from range [addr, addr+size) of pid.
    we can do this force-pagein against file caches and shmem now.
    this is for swap.

I doubts there are no one who can make use of this in sane way. But I'm
sometimes surprised to find that there are people make use of swap
intentionally...

Thanks,
-Kame



--
To unsubscribe, send a message with 'unsubscribe linux-mm' in
the body to majordomo@kvack.org.  For more info on Linux MM,
see: http://www.linux-mm.org/ .
Don't email: <a href=mailto:"dont@kvack.org"> email@kvack.org </a>