diff options
Diffstat (limited to 'Documentation/sysctl')
| -rw-r--r-- | Documentation/sysctl/vm.txt | 12 |
1 files changed, 8 insertions, 4 deletions
diff --git a/Documentation/sysctl/vm.txt b/Documentation/sysctl/vm.txt index 0ea5adbc5b16..c4de6359d440 100644 --- a/Documentation/sysctl/vm.txt +++ b/Documentation/sysctl/vm.txt | |||
| @@ -315,10 +315,14 @@ min_unmapped_ratio: | |||
| 315 | 315 | ||
| 316 | This is available only on NUMA kernels. | 316 | This is available only on NUMA kernels. |
| 317 | 317 | ||
| 318 | A percentage of the total pages in each zone. Zone reclaim will only | 318 | This is a percentage of the total pages in each zone. Zone reclaim will |
| 319 | occur if more than this percentage of pages are file backed and unmapped. | 319 | only occur if more than this percentage of pages are in a state that |
| 320 | This is to insure that a minimal amount of local pages is still available for | 320 | zone_reclaim_mode allows to be reclaimed. |
| 321 | file I/O even if the node is overallocated. | 321 | |
| 322 | If zone_reclaim_mode has the value 4 OR'd, then the percentage is compared | ||
| 323 | against all file-backed unmapped pages including swapcache pages and tmpfs | ||
| 324 | files. Otherwise, only unmapped pages backed by normal files but not tmpfs | ||
| 325 | files and similar are considered. | ||
| 322 | 326 | ||
| 323 | The default is 1 percent. | 327 | The default is 1 percent. |
| 324 | 328 | ||