[lkml]   [2000]   [Sep]   [15]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
SubjectRe: [PATCH *] VM patch for 2.4.0-test8
On Thu, 14 Sep 2000, Rik van Riel wrote:

> On Wed, 13 Sep 2000, David S. Miller wrote:
> > In page_launder() about halfway down there is this sequence of tests
> > on LRU pages:
> >
> > if (!clearedbuf) {
> > ...
> > } else if (!page->mapping) {
> > ...
> > } else if (page_count(page) > 1) {
> > } else /* page->mapping && page_count(page) == 1 */ {
> > ...
> > }
> >
> > Above this sequence we've done a page_cache_get.
> Indeed, you're right. This bug certainly explains some
> of the performance things I've seen in the stress test
> last night...
> Btw, in case you're wondering ... the box /survived/
> a stress test that would get programs killed on quite
> a few "stable" kernels we've been shipping lately. ;)

Here comes a success report.

I've been using 2.4.0test8+2.4.0-t8-vmpatch2 for about a day now and the
performance is great.

I've just bought a new harddrive and I was copying a _lot_ of data to the
new drive and didn't notice anything axcept the HDD led flashing :)

And now I helped a friend back up his data while he converts to reiserfs.
I had a stream of 7-9MB/s down to my harddrive for quite a while and still
didn't notice anything. Everything ended up on the inactive list.

I've been trying to get my machine to swap but that seems hard with this
new patch :) I have 0kB of swap used after 8h uptime, and I have been
compiling, moving files between partitions and running md5sum on files
(that was a big problem before, everything ended up on the active list and
the swapping started and brought my machine down to a crawl)

I can mention that while backing up my friends data I had 7000-9000
interrupts per second and 10 000 - 12 000 context switches per second.
I was really impressed that I didn't notice anything. I remember that my
machine was terribly slow when it did over 5000 context switches with
vanilla test6.
(My machine is a pIII 700 with 256MB ram)

If anyone want more info or anything please feel free to mail me.
(Hopefully my mailserver is up, we've been experiencing some power


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

 \ /
  Last update: 2005-03-22 12:38    [W:0.051 / U:0.104 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site