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Fix extent_alloc_cache[_locked]() to support decommitted allocation.

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Fix extent_alloc_cache[_locked]() to support decommitted allocation, and
use this ability in arena_stash_dirty(), so that decommitted extents are
not needlessly committed during purging.  In practice this does not
happen on any currently supported systems, because both extent merging
and decommit must be implemented; all supported systems implement one
xor the other.
This commit is contained in:
Jason Evans
2016-11-03 17:25:54 -07:00
parent 4f7d8c2dee
commit 8dd5ea87ca
4 changed files with 19 additions and 20 deletions
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4
include/jemalloc/internal/extent.h
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@@ -101,10 +101,10 @@ ph_proto(, extent_heap_, extent_heap_t, extent_t)
extent_t *extent_alloc_cache_locked(tsdn_t *tsdn, arena_t *arena,
extent_hooks_t **r_extent_hooks, void *new_addr, size_t usize, size_t pad,
size_t alignment, bool *zero, bool slab);
size_t alignment, bool *zero, bool *commit, bool slab);
extent_t *extent_alloc_cache(tsdn_t *tsdn, arena_t *arena,
extent_hooks_t **r_extent_hooks, void *new_addr, size_t usize, size_t pad,
size_t alignment, bool *zero, bool slab);
size_t alignment, bool *zero, bool *commit, bool slab);
extent_t *extent_alloc_wrapper(tsdn_t *tsdn, arena_t *arena,
extent_hooks_t **r_extent_hooks, void *new_addr, size_t usize, size_t pad,
size_t alignment, bool *zero, bool *commit, bool slab);