romenskiy2012/jemalloc
1
0
Fork 0
mirror of https://github.com/jemalloc/jemalloc.git synced 2026-04-28 05:42:17 +03:00
Code Issues Projects Releases Packages Wiki Activity

Fix potential VM map fragmentation regression.

Browse source 
Revert 245ae6036c (Support --with-lg-page
values larger than actual page size.), because it could cause VM map
fragmentation if the kernel grows mmap()ed memory downward.

This resolves #391.
This commit is contained in:
Jason Evans 2016-06-07 14:15:49 -07:00
parent de23f6fce7
commit dd752c1ffd
2 changed files with 2 additions and 2 deletions
Download patch file Download diff file Expand all files Collapse all files

2
include/jemalloc/internal/jemalloc_internal.h.in
View file

@ -813,7 +813,7 @@ sa2u(size_t size, size_t alignment)
* Calculate the multi-page mapping that large_palloc() would need in
* order to guarantee the alignment.
*/
if (usize + large_pad + PAGE_CEILING(alignment) < usize) {
if (usize + large_pad + PAGE_CEILING(alignment) - PAGE < usize) {
/* size_t overflow. */
return (0);
}