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| author | Florian Weimer <fweimer@redhat.com> | 2015-10-28 19:32:46 +0100 |
|---|---|---|
| committer | Florian Weimer <fweimer@redhat.com> | 2015-10-28 21:29:23 +0100 |
| commit | a62719ba90e2fa1728890ae7dc8df9e32a622e7b (patch) | |
| tree | 27408968ee32da2b27effd96bce95fd93c399208 /NEWS | |
| parent | 0b9af583a5c2d68085e88cece13952bf05dc4882 (diff) | |
| download | glibc-a62719ba90e2fa1728890ae7dc8df9e32a622e7b.zip glibc-a62719ba90e2fa1728890ae7dc8df9e32a622e7b.tar.gz glibc-a62719ba90e2fa1728890ae7dc8df9e32a622e7b.tar.bz2 | |
malloc: Prevent arena free_list from turning cyclic [BZ #19048]
[BZ# 19048]
* malloc/malloc.c (struct malloc_state): Update comment. Add
attached_threads member.
(main_arena): Initialize attached_threads.
* malloc/arena.c (list_lock): Update comment.
(ptmalloc_lock_all, ptmalloc_unlock_all): Likewise.
(ptmalloc_unlock_all2): Reinitialize arena reference counts.
(deattach_arena): New function.
(_int_new_arena): Initialize arena reference count and deattach
replaced arena.
(get_free_list, reused_arena): Update reference count and deattach
replaced arena.
(arena_thread_freeres): Update arena reference count and only put
unreferenced arenas on the free list.
Diffstat (limited to 'NEWS')
| -rw-r--r-- | NEWS | 15 |
1 files changed, 12 insertions, 3 deletions
@@ -19,9 +19,18 @@ Version 2.23 18823, 18824, 18825, 18857, 18863, 18870, 18872, 18873, 18875, 18887, 18918, 18921, 18928, 18951, 18952, 18953, 18956, 18961, 18966, 18967, 18969, 18970, 18977, 18980, 18981, 18982, 18985, 19003, 19007, 19012, - 19016, 19018, 19032, 19046, 19049, 19050, 19059, 19071, 19074, 19076, - 19077, 19078, 19079, 19085, 19086, 19088, 19094, 19095, 19124, 19125, - 19129, 19134, 19137, 19156, 19174, 19181. + 19016, 19018, 19032, 19046, 19048, 19049, 19050, 19059, 19071, 19074, + 19076, 19077, 19078, 19079, 19085, 19086, 19088, 19094, 19095, 19124, + 19125, 19129, 19134, 19137, 19156, 19174, 19181. + +* A defect in the malloc implementation, present since glibc 2.15 (2012) or + glibc 2.10 via --enable-experimental-malloc (2009), could result in the + unnecessary serialization of memory allocation requests across threads. + The defect is now corrected. Users should see a substantial increase in + the concurent throughput of allocation requests for applications which + trigger this bug. Affected applications typically create create and + destroy threads frequently. (Bug 19048 was reported and analyzed by + Ericsson.) * There is now a --disable-timezone-tools configure option for disabling the building and installing of the timezone related utilities (zic, zdump, and |