lkml.org 
[lkml]   [1998]   [Jul]   [22]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: 2.1.110 freepages.min change
Linus Torvalds wrote:

> But does it make any difference performance-wise for you?

A few sporadic flushes during a compile won't make much difference, but
I'm more concerned about the case of busy news or web servers. Such
machines would likely be doing some level of swapping all of the time,
even if properly configured with adequate memory. If the vm system
cycles through the swap states every second or two, flushing the dcache
each time, then the effective "memory" of the dcache will be limited by
that cycle time.

These are the kinds of applications that should show off the 2.1 dcache
to its best effect, but may instead not show much or any performance
benefit.

> If it flushes the name cache a few times during a kernel compile I
> wouldn't be worried - I'm a lot more worried about not flushing it enough,
> as was clearly the case on small-memory machines.

Well, I'm pretty much convinced that the small-memory "rust" problem was
really a configuration issue, with the inode limit set too high for the
system memory.

Regards,
Bill

-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.rutgers.edu
Please read the FAQ at http://www.altern.org/andrebalsa/doc/lkml-faq.html

\
 
 \ /
  Last update: 2005-03-22 13:43    [W:0.047 / U:0.348 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site