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Refactor purging and splitting/merging.

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Split purging into lazy and forced variants.  Use the forced variant for
zeroing dss.

Add support for NULL function pointers as an opt-out mechanism for the
dalloc, commit, decommit, purge_lazy, purge_forced, split, and merge
fields of extent_hooks_t.

Add short-circuiting checks in large_ralloc_no_move_{shrink,expand}() so
that no attempt is made if splitting/merging is not supported.

This resolves #268.
This commit is contained in:
Jason Evans 2016-12-03 15:38:25 -08:00
parent 884fa22b8c
commit a6e86810d8
11 changed files with 258 additions and 84 deletions
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5
include/jemalloc/internal/extent.h
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@ -133,7 +133,10 @@ bool extent_commit_wrapper(tsdn_t *tsdn, arena_t *arena,
bool extent_decommit_wrapper(tsdn_t *tsdn, arena_t *arena,
extent_hooks_t **r_extent_hooks, extent_t *extent, size_t offset,
size_t length);
bool extent_purge_wrapper(tsdn_t *tsdn, arena_t *arena,
bool extent_purge_lazy_wrapper(tsdn_t *tsdn, arena_t *arena,
extent_hooks_t **r_extent_hooks, extent_t *extent, size_t offset,
size_t length);
bool extent_purge_forced_wrapper(tsdn_t *tsdn, arena_t *arena,
extent_hooks_t **r_extent_hooks, extent_t *extent, size_t offset,
size_t length);
extent_t *extent_split_wrapper(tsdn_t *tsdn, arena_t *arena,