project-base/server-skynet-source-3rd-jemalloc
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Add extent_grow_mtx in pre_ / post_fork handlers.

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This fixed the issue that could cause the child process to stuck after fork.
This commit is contained in:
Qi Wang 2017-06-29 16:01:35 -07:00 committed by Qi Wang
parent 2b31cf5bd2
commit cb032781bd
3 changed files with 16 additions and 5 deletions
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1
include/jemalloc/internal/arena_externs.h
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@ -90,6 +90,7 @@ void arena_prefork3(tsdn_t *tsdn, arena_t *arena);
void arena_prefork4(tsdn_t *tsdn, arena_t *arena);
void arena_prefork5(tsdn_t *tsdn, arena_t *arena);
void arena_prefork6(tsdn_t *tsdn, arena_t *arena);
void arena_prefork7(tsdn_t *tsdn, arena_t *arena);
void arena_postfork_parent(tsdn_t *tsdn, arena_t *arena);
void arena_postfork_child(tsdn_t *tsdn, arena_t *arena);

15
src/arena.c
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@ -2087,28 +2087,33 @@ arena_prefork1(tsdn_t *tsdn, arena_t *arena) {
void
arena_prefork2(tsdn_t *tsdn, arena_t *arena) {
malloc_mutex_prefork(tsdn, &arena->extent_grow_mtx);
}
void
arena_prefork3(tsdn_t *tsdn, arena_t *arena) {
extents_prefork(tsdn, &arena->extents_dirty);
extents_prefork(tsdn, &arena->extents_muzzy);
extents_prefork(tsdn, &arena->extents_retained);
}
void
arena_prefork3(tsdn_t *tsdn, arena_t *arena) {
arena_prefork4(tsdn_t *tsdn, arena_t *arena) {
malloc_mutex_prefork(tsdn, &arena->extent_avail_mtx);
}
void
arena_prefork4(tsdn_t *tsdn, arena_t *arena) {
arena_prefork5(tsdn_t *tsdn, arena_t *arena) {
base_prefork(tsdn, arena->base);
}
void
arena_prefork5(tsdn_t *tsdn, arena_t *arena) {
arena_prefork6(tsdn_t *tsdn, arena_t *arena) {
malloc_mutex_prefork(tsdn, &arena->large_mtx);
}
void
arena_prefork6(tsdn_t *tsdn, arena_t *arena) {
arena_prefork7(tsdn_t *tsdn, arena_t *arena) {
for (unsigned i = 0; i < NBINS; i++) {
malloc_mutex_prefork(tsdn, &arena->bins[i].lock);
}
@ -2127,6 +2132,7 @@ arena_postfork_parent(tsdn_t *tsdn, arena_t *arena) {
extents_postfork_parent(tsdn, &arena->extents_dirty);
extents_postfork_parent(tsdn, &arena->extents_muzzy);
extents_postfork_parent(tsdn, &arena->extents_retained);
malloc_mutex_postfork_parent(tsdn, &arena->extent_grow_mtx);
malloc_mutex_postfork_parent(tsdn, &arena->decay_dirty.mtx);
malloc_mutex_postfork_parent(tsdn, &arena->decay_muzzy.mtx);
if (config_stats) {
@ -2164,6 +2170,7 @@ arena_postfork_child(tsdn_t *tsdn, arena_t *arena) {
extents_postfork_child(tsdn, &arena->extents_dirty);
extents_postfork_child(tsdn, &arena->extents_muzzy);
extents_postfork_child(tsdn, &arena->extents_retained);
malloc_mutex_postfork_child(tsdn, &arena->extent_grow_mtx);
malloc_mutex_postfork_child(tsdn, &arena->decay_dirty.mtx);
malloc_mutex_postfork_child(tsdn, &arena->decay_muzzy.mtx);
if (config_stats) {

5
src/jemalloc.c
View File

@ -3049,7 +3049,7 @@ _malloc_prefork(void)
background_thread_prefork1(tsd_tsdn(tsd));
}
/* Break arena prefork into stages to preserve lock order. */
for (i = 0; i < 7; i++) {
for (i = 0; i < 8; i++) {
for (j = 0; j < narenas; j++) {
if ((arena = arena_get(tsd_tsdn(tsd), j, false)) !=
NULL) {
@ -3075,6 +3075,9 @@ _malloc_prefork(void)
case 6:
arena_prefork6(tsd_tsdn(tsd), arena);
break;
case 7:
arena_prefork7(tsd_tsdn(tsd), arena);
break;
default: not_reached();
}
}