Re: Locking comment on shrink_caches()

[David S. Miller]

   From: Marcelo Tosatti <[e-mail]>
   Date: Tue, 25 Sep 2001 15:40:23 -0300 (BRT)
   
   We can simply lock the pagecachelock and the pagemap_lru_lock at the
   beginning of the cleaning function. page_launder() use to do that.
   
   Thats why I asked Andrea if there was long hold times by shrink_caches().
   
Ok, I see.

I do think it's silly to hold the pagecache_lock during pure scanning
activities of shrink_caches().

It is known that pagecache_lock is the biggest scalability issue on
large SMP systems, and thus the page cache locking patches Ingo and
myself did.

Franks a lot,
David S. Miller
[e-mail]