Messages in this thread |  | | Date | Fri, 15 Sep 2000 19:28:43 +0200 (CEST) | From | Martin Josefsson <> | Subject | Re: [PATCH *] VM patch for 2.4.0-test8 |
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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 problems)
/Martin
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