diff options
| -rw-r--r-- | ChangeLog | 6 | ||||
| -rw-r--r-- | NEWS | 12 | ||||
| -rw-r--r-- | malloc/arena.c | 13 |
3 files changed, 22 insertions, 9 deletions
@@ -1,3 +1,9 @@ +2015-04-02 Mel Gorman <mgorman@suse.de> + + [BZ #17195] + * malloc/arena.c (free): Apply trim threshold to per-thread heaps + as well as the main arena. + 2015-03-31 H.J. Lu <hongjiu.lu@intel.com> [BZ #18185] @@ -10,12 +10,12 @@ Version 2.22 * The following bugs are resolved with this release: 4719, 13064, 14094, 14841, 14906, 15319, 15467, 15790, 15969, 16351, - 16512, 16560, 16783, 17090, 17269, 17523, 17542, 17569, 17588, 17620, - 17621, 17628, 17631, 17711, 17776, 17779, 17792, 17836, 17912, 17916, - 17932, 17944, 17949, 17964, 17965, 17967, 17969, 17978, 17987, 17991, - 17996, 17998, 17999, 18019, 18020, 18029, 18030, 18032, 18036, 18038, - 18039, 18042, 18043, 18046, 18047, 18068, 18080, 18093, 18100, 18104, - 18110, 18111, 18128, 18138, 18185. + 16512, 16560, 16783, 17090, 17195, 17269, 17523, 17542, 17569, 17588, + 17620, 17621, 17628, 17631, 17711, 17776, 17779, 17792, 17836, 17912, + 17916, 17932, 17944, 17949, 17964, 17965, 17967, 17969, 17978, 17987, + 17991, 17996, 17998, 17999, 18019, 18020, 18029, 18030, 18032, 18036, + 18038, 18039, 18042, 18043, 18046, 18047, 18068, 18080, 18093, 18100, + 18104, 18110, 18111, 18128, 18138, 18185. * A powerpc and powerpc64 optimization for TLS, similar to TLS descriptors for LD and GD on x86 and x86-64, has been implemented. You will need diff --git a/malloc/arena.c b/malloc/arena.c index 8af51f05eb..d85f3712f7 100644 --- a/malloc/arena.c +++ b/malloc/arena.c @@ -658,7 +658,7 @@ heap_trim (heap_info *heap, size_t pad) unsigned long pagesz = GLRO (dl_pagesize); mchunkptr top_chunk = top (ar_ptr), p, bck, fwd; heap_info *prev_heap; - long new_size, top_size, extra, prev_size, misalign; + long new_size, top_size, top_area, extra, prev_size, misalign; /* Can this heap go away completely? */ while (top_chunk == chunk_at_offset (heap, sizeof (*heap))) @@ -694,9 +694,16 @@ heap_trim (heap_info *heap, size_t pad) set_head (top_chunk, new_size | PREV_INUSE); /*check_chunk(ar_ptr, top_chunk);*/ } + + /* Uses similar logic for per-thread arenas as the main arena with systrim + by preserving the top pad and at least a page. */ top_size = chunksize (top_chunk); - extra = (top_size - pad - MINSIZE - 1) & ~(pagesz - 1); - if (extra < (long) pagesz) + top_area = top_size - MINSIZE - 1; + if (top_area <= pad) + return 0; + + extra = ALIGN_DOWN(top_area - pad, pagesz); + if ((unsigned long) extra < mp_.trim_threshold) return 0; /* Try to shrink. */ |