lkml.org 
[lkml]   [2002]   [Aug]   [29]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH] low-latency zap_page_range()
Robert Love wrote:
>
> ...
> unless we
> wanted to unconditionally drop the locks and let preempt just do the
> right thing and also reduce SMP lock contention in the SMP case.

That's an interesting point. page_table_lock is one of those locks
which is occasionally held for ages, and frequently held for a short
time.

I suspect that yes, voluntarily popping the lock during the long holdtimes
will allow other CPUs to get on with stuff, and will provide efficiency
increases. (It's a pretty lame way of doing that though).

But I don't recall seeing nasty page_table_lock spintimes on
anyone's lockmeter reports, so...
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2005-03-22 13:28    [W:0.056 / U:11.100 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site