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2001-02-14  Wolfram Gloger  <wg@malloc.de>

	* malloc/malloc.c (new_heap): When allocating large chunk aligned
	to HEAP_MAX_SIZE, prefer one with lower address, to avoid `holes'
	between the heaps.
This commit is contained in:
Ulrich Drepper
2001-02-15 03:39:03 +00:00
parent cd53c157cf
commit 8a216c1bd8
3 changed files with 12 additions and 1 deletions
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2
malloc/malloc.c
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@ -2026,7 +2026,7 @@ new_heap(size) size_t size;
anyway). */
p1 = (char *)MMAP(0, HEAP_MAX_SIZE<<1, PROT_NONE, MAP_PRIVATE|MAP_NORESERVE);
if(p1 != MAP_FAILED) {
p2 = (char *)(((unsigned long)p1 + HEAP_MAX_SIZE) & ~(HEAP_MAX_SIZE-1));
p2 = (char *)(((unsigned long)p1 + (HEAP_MAX_SIZE-1)) & ~(HEAP_MAX_SIZE-1));
ul = p2 - p1;
munmap(p1, ul);
munmap(p2 + HEAP_MAX_SIZE, HEAP_MAX_SIZE - ul);