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| author | Lachlan McIlroy <lachlan@redback.melbourne.sgi.com> | 2009-01-14 16:29:51 +1100 |
|---|---|---|
| committer | Lachlan McIlroy <lachlan@redback.melbourne.sgi.com> | 2009-01-14 16:29:51 +1100 |
| commit | cb7a97d01521797cad9f63e8478403c3e51fea49 (patch) | |
| tree | 84cddf20369f82f10c1c3712e6cce20dd1b9d863 /Documentation/sysctl | |
| parent | 0335cb76aa3fa913a2164bc9b669e5aef9d56fa3 (diff) | |
| parent | a6525042bfdfcab128bd91fad264de10fd24a55e (diff) | |
| download | linux-cb7a97d01521797cad9f63e8478403c3e51fea49.tar.bz2 | |
Merge git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6 into for-linus
Diffstat (limited to 'Documentation/sysctl')
| -rw-r--r-- | Documentation/sysctl/vm.txt | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/Documentation/sysctl/vm.txt b/Documentation/sysctl/vm.txt index cd05994a49e6..a3415070bcac 100644 --- a/Documentation/sysctl/vm.txt +++ b/Documentation/sysctl/vm.txt @@ -38,6 +38,7 @@ Currently, these files are in /proc/sys/vm: - numa_zonelist_order - nr_hugepages - nr_overcommit_hugepages +- nr_trim_pages (only if CONFIG_MMU=n) ============================================================== @@ -348,3 +349,20 @@ Change the maximum size of the hugepage pool. The maximum is nr_hugepages + nr_overcommit_hugepages. See Documentation/vm/hugetlbpage.txt + +============================================================== + +nr_trim_pages + +This is available only on NOMMU kernels. + +This value adjusts the excess page trimming behaviour of power-of-2 aligned +NOMMU mmap allocations. + +A value of 0 disables trimming of allocations entirely, while a value of 1 +trims excess pages aggressively. Any value >= 1 acts as the watermark where +trimming of allocations is initiated. + +The default value is 1. + +See Documentation/nommu-mmap.txt for more information. |