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| author | Maxim Dounin <mdounin@mdounin.ru> | 2014-06-03 17:53:03 +0400 |
|---|---|---|
| committer | Maxim Dounin <mdounin@mdounin.ru> | 2014-06-03 17:53:03 +0400 |
| commit | afb4aafc6e42781068ce3f23d22fd6e2012787c7 (patch) | |
| tree | 6e24e4615508e24778460240cdb850499ebd6315 /src/core/ngx_slab.h | |
| parent | 9b5a17b5e23e8e7c94d84eb85044370e38887849 (diff) | |
Core: slab allocator free pages defragmentation.
Large allocations from a slab pool result in free page blocks being fragmented,
eventually leading to a situation when no further allocation larger than a page
size are possible from the pool. While this isn't a problem for nginx itself,
it is known to be bad for various 3rd party modules. Fix is to merge adjacent
blocks of free pages in the ngx_slab_free_pages() function.
Prodded by Wandenberg Peixoto and Yichun Zhang.
Diffstat (limited to 'src/core/ngx_slab.h')
| -rw-r--r-- | src/core/ngx_slab.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/src/core/ngx_slab.h b/src/core/ngx_slab.h index 5735e3bb3..1ee65d531 100644 --- a/src/core/ngx_slab.h +++ b/src/core/ngx_slab.h @@ -29,6 +29,7 @@ typedef struct { size_t min_shift; ngx_slab_page_t *pages; + ngx_slab_page_t *last; ngx_slab_page_t free; u_char *start; |