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Fix mlockall()/madvise() interaction.

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mlockall(2) can cause purging via madvise(2) to fail.  Fix purging code
to check whether madvise() succeeded, and base zeroed page metadata on
the result.

Reported by Olivier Lecomte.
This commit is contained in:
Jason Evans 2012-10-08 17:56:11 -07:00
parent f4c3f8545b
commit 7de92767c2
5 changed files with 48 additions and 41 deletions
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2
include/jemalloc/internal/chunk_mmap.h
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@ -9,7 +9,7 @@
/******************************************************************************/
#ifdef JEMALLOC_H_EXTERNS
void pages_purge(void *addr, size_t length);
bool pages_purge(void *addr, size_t length);
void *chunk_alloc_mmap(size_t size, size_t alignment, bool *zero);
bool chunk_dealloc_mmap(void *chunk, size_t size);

3
include/jemalloc/internal/extent.h
View file

@ -23,6 +23,9 @@ struct extent_node_s {
/* Total region size. */
size_t size;
/* True if zero-filled; used by chunk recycling code. */
bool zeroed;
};
typedef rb_tree(extent_node_t) extent_tree_t;