Re: [RFC 00/26] Slab defragmentation V5

2007-09-06 Thread Jörn Engel
On Fri, 31 August 2007 18:41:07 -0700, Christoph Lameter wrote: > > The trouble with this patchset is that it is difficult to validate. > Activities are only performed when special load situations are encountered. > Are there any tests that could give meaningful information about > the effectivene

[RFC 00/26] Slab defragmentation V5

2007-08-31 Thread Christoph Lameter
Slab defragmentation is mainly an issue if Linux is used as a fileserver and large amounts of dentries, inodes and buffer heads accumulate. In some load situations the slabs become very sparsely populated so that a lot of memory is wasted by slabs that only contain one or a few objects. In extreme