lihao/jemalloc
1
0
Fork 0
mirror of https://github.com/jemalloc/jemalloc.git synced 2026-07-23 13:13:06 +00:00
Code Issues Packages Projects Releases Wiki Activity

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

Browse Source 
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
Download Patch File Download Diff File Expand all files Collapse all files

20
src/extent.c
View File

@@ -517,8 +517,9 @@ extent_recycle(tsdn_t *tsdn, arena_t *arena, extent_hooks_t **r_extent_hooks,
extent_usize_set(extent, usize);
}
if (!extent_committed_get(extent) && extent_commit_wrapper(tsdn, arena,
r_extent_hooks, extent, 0, extent_size_get(extent))) {
if (commit && !extent_committed_get(extent) &&
extent_commit_wrapper(tsdn, arena, r_extent_hooks, extent, 0,
extent_size_get(extent))) {
if (!locked)
malloc_mutex_unlock(tsdn, &arena->extents_mtx);
extent_record(tsdn, arena, r_extent_hooks, extent_heaps, cache,
@@ -590,44 +591,41 @@ extent_alloc_core(tsdn_t *tsdn, arena_t *arena, void *new_addr, size_t size,
static extent_t *
extent_alloc_cache_impl(tsdn_t *tsdn, arena_t *arena,
extent_hooks_t **r_extent_hooks, bool locked, void *new_addr, size_t usize,
size_t pad, size_t alignment, bool *zero, bool slab)
size_t pad, size_t alignment, bool *zero, bool *commit, bool slab)
{
extent_t *extent;
bool commit;
assert(usize + pad != 0);
assert(alignment != 0);
commit = true;
extent = extent_recycle(tsdn, arena, r_extent_hooks,
arena->extents_cached, locked, true, new_addr, usize, pad,
alignment, zero, &commit, slab);
alignment, zero, commit, slab);
if (extent == NULL)
return (NULL);
assert(commit);
return (extent);
}
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)
{
malloc_mutex_assert_owner(tsdn, &arena->extents_mtx);
return (extent_alloc_cache_impl(tsdn, arena, r_extent_hooks, true,
new_addr, usize, pad, alignment, zero, slab));
new_addr, usize, pad, alignment, zero, commit, 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)
{
return (extent_alloc_cache_impl(tsdn, arena, r_extent_hooks, false,
new_addr, usize, pad, alignment, zero, slab));
new_addr, usize, pad, alignment, zero, commit, slab));
}
static void *