Re: [patch 00/20] VM pageout scalability improvements

2007-12-27 Thread Matt Mackall
On Sun, 2007-12-23 at 20:11 -0500, Rik van Riel wrote: > On Mon, 24 Dec 2007 04:29:36 +0530 > Balbir Singh <[EMAIL PROTECTED]> wrote: > > Rik van Riel wrote: > > > > In the real world, users with large JVMs on their servers, which > > > sometimes go a little into swap, can trigger this system. A

Re: [patch 00/20] VM pageout scalability improvements

2007-12-23 Thread Rik van Riel
On Mon, 24 Dec 2007 04:29:36 +0530 Balbir Singh <[EMAIL PROTECTED]> wrote: > Rik van Riel wrote: > > In the real world, users with large JVMs on their servers, which > > sometimes go a little into swap, can trigger this system. All of > > the CPUs end up scanning the active list, and all pages ha

Re: [patch 00/20] VM pageout scalability improvements

2007-12-23 Thread Balbir Singh
Rik van Riel wrote: > On Sun, 23 Dec 2007 01:57:32 +0530 > Balbir Singh <[EMAIL PROTECTED]> wrote: >> Rik van Riel wrote: >>> On large memory systems, the VM can spend way too much time scanning >>> through pages that it cannot (or should not) evict from memory. Not >>> only does it use up CPU time

Re: [patch 00/20] VM pageout scalability improvements

2007-12-22 Thread Rik van Riel
On Sun, 23 Dec 2007 01:57:32 +0530 Balbir Singh <[EMAIL PROTECTED]> wrote: > Rik van Riel wrote: > > On large memory systems, the VM can spend way too much time scanning > > through pages that it cannot (or should not) evict from memory. Not > > only does it use up CPU time, but it also provokes lo

Re: [patch 00/20] VM pageout scalability improvements

2007-12-22 Thread Balbir Singh
Rik van Riel wrote: > On large memory systems, the VM can spend way too much time scanning > through pages that it cannot (or should not) evict from memory. Not > only does it use up CPU time, but it also provokes lock contention > and can leave large systems under memory presure in a catatonic sta