From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 13569 invoked by alias); 15 Sep 2012 10:44:02 -0000 Received: (qmail 13559 invoked by uid 22791); 15 Sep 2012 10:44:01 -0000 X-SWARE-Spam-Status: No, hits=-3.8 required=5.0 tests=ALL_TRUSTED,AWL,BAYES_00,KHOP_THREADED X-Spam-Check-By: sourceware.org Received: from localhost (HELO sourceware.org) (127.0.0.1) by sourceware.org (qpsmtpd/0.43rc1) with ESMTP; Sat, 15 Sep 2012 10:43:46 +0000 From: "dev at parallels dot com" To: glibc-bugs@sources.redhat.com Subject: [Bug malloc/14581] glibc leaks memory and do not reuse after free (leading to unlimited RSS growth) Date: Sat, 15 Sep 2012 10:44:00 -0000 X-Bugzilla-Reason: CC X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: glibc X-Bugzilla-Component: malloc X-Bugzilla-Keywords: X-Bugzilla-Severity: normal X-Bugzilla-Who: dev at parallels dot com X-Bugzilla-Status: NEW X-Bugzilla-Priority: P2 X-Bugzilla-Assigned-To: unassigned at sourceware dot org X-Bugzilla-Target-Milestone: --- X-Bugzilla-Changed-Fields: Message-ID: In-Reply-To: References: X-Bugzilla-URL: http://sourceware.org/bugzilla/ Auto-Submitted: auto-generated Content-Type: text/plain; charset="UTF-8" MIME-Version: 1.0 Mailing-List: contact glibc-bugs-help@sourceware.org; run by ezmlm Precedence: bulk List-Id: List-Subscribe: List-Post: List-Help: , Sender: glibc-bugs-owner@sourceware.org X-SW-Source: 2012-09/txt/msg00123.txt.bz2 http://sourceware.org/bugzilla/show_bug.cgi?id=14581 --- Comment #3 from Kirill Korotaev 2012-09-15 10:43:46 UTC --- one more finding: not reproducible if replace memalign with malloc() (even if add paddings as memalign does). Comment from ANK on this: Interesting. memalign() in glibc is very simple: it is just malloc(size + alignment + some_small_number) then tail and head returned to pool. Probably, this is the culprit. Long shot: when result of memalign is freed, malloc does not merge fragments, so hole will be of three free parts: head, body, tail and it is unusable for future memalign. -- Configure bugmail: http://sourceware.org/bugzilla/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.