[lkml]   [2002]   [Sep]   [8]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
SubjectRe: LMbench2.0 results
On Sun, 8 Sep 2002, Andrew Morton wrote:
> We need to find some way of making vm_enough_memory not call get_page_state
> so often. One way of doing that might be to make get_page_state dump
> its latest result into a global copy, and make vm_enough_memory()
> only get_page_state once per N invokations. A speed/accuracy tradeoff there.

Accuracy is not very important in that sysctl_overcommit_memory 0 case
e.g. the swapper_space.nr_pages addition was brought in at a time when
it was very necessary, but usually overestimates now (or last time I
thought about it). The main thing to look out for is running the same
memory grabber twice in quick succession: not nice if it succeeds the
first time, but not the second, just because of some transient effect
that its old pages are temporarily uncounted.


To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to
More majordomo info at
Please read the FAQ at

 \ /
  Last update: 2005-03-22 13:28    [W:1.068 / U:4.268 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site