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Implement guard pages.

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Adding guarded extents, which are regular extents surrounded by guard pages
(mprotected).  To reduce syscalls, small guarded extents are cached as a
separate eset in ecache, and decay through the dirty / muzzy / retained pipeline
as usual.
This commit is contained in:
Qi Wang
2021-04-26 14:22:25 -07:00
committed by Qi Wang
parent 7bb05e04be
commit deb8e62a83
41 changed files with 920 additions and 251 deletions
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4
src/ecache.c
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@@ -1,6 +1,8 @@
#include "jemalloc/internal/jemalloc_preamble.h"
#include "jemalloc/internal/jemalloc_internal_includes.h"
#include "jemalloc/internal/guard.h"
bool
ecache_init(tsdn_t *tsdn, ecache_t *ecache, extent_state_t state, unsigned ind,
bool delay_coalesce) {
@@ -12,6 +14,8 @@ ecache_init(tsdn_t *tsdn, ecache_t *ecache, extent_state_t state, unsigned ind,
ecache->ind = ind;
ecache->delay_coalesce = delay_coalesce;
eset_init(&ecache->eset, state);
eset_init(&ecache->guarded_eset, state);
return false;
}