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From: "bugdal at aerifal dot cx" <sourceware-bugzilla@sourceware.org> 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: Fri, 14 Sep 2012 19:27:00 -0000 [thread overview] Message-ID: <bug-14581-131-XRr6JRmiUi@http.sourceware.org/bugzilla/> (raw) In-Reply-To: <bug-14581-131@http.sourceware.org/bugzilla/> http://sourceware.org/bugzilla/show_bug.cgi?id=14581 Rich Felker <bugdal at aerifal dot cx> changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |bugdal at aerifal dot cx --- Comment #1 from Rich Felker <bugdal at aerifal dot cx> 2012-09-14 19:26:39 UTC --- Is this supposed to be a bug report or a trick question for CS students? :) You claimed "there is no heap fragmentation", but the allocation/free pattern you're performing seems like a classic fragmentation stress test pattern. There is no general-purpose allocation strategy that can avoid all instances of pathological fragmentation, and this pattern is one that would be especially hard to avoid without having special-cased it (and probably making malloc behavior much worse for common real-world cases). Did you run into this issue in a real-world application, or did you construct this test as a worst-case? By the way, the pathological fragmentation observed here does not seem specific to glibc. It seems like it will occur with any allocator utilizing the basic dlmalloc strategy. I just confirmed that the same issue happens with ours in musl libc. -- 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.
next prev parent reply other threads:[~2012-09-14 19:27 UTC|newest] Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top 2012-09-14 9:41 [Bug malloc/14581] New: " dev at parallels dot com 2012-09-14 19:27 ` bugdal at aerifal dot cx [this message] 2012-09-15 10:40 ` [Bug malloc/14581] " dev at parallels dot com 2012-09-15 10:44 ` dev at parallels dot com 2012-09-15 12:39 ` bugdal at aerifal dot cx 2012-09-15 14:08 ` bugdal at aerifal dot cx 2012-09-15 21:00 ` bugdal at aerifal dot cx 2012-09-16 9:44 ` dev at parallels dot com 2012-09-16 12:46 ` bugdal at aerifal dot cx 2013-05-13 9:30 ` siddhesh at redhat dot com 2013-05-20 15:12 ` ondra at iuuk dot mff.cuni.cz 2013-05-20 15:39 ` siddhesh at redhat dot com 2014-06-17 4:31 ` fweimer at redhat dot com 2020-04-28 20:05 ` [Bug malloc/14581] memalign allocations are often not reused after free mail at nh2 dot me 2021-11-25 18:05 ` carlos at redhat dot com 2022-08-02 22:20 ` mirh at protonmail dot ch 2022-08-10 4:00 ` carlos at redhat dot com 2022-12-08 14:10 ` nsz at gcc dot gnu.org 2022-12-08 14:47 ` acoplan at gcc dot gnu.org 2022-12-08 16:13 ` carlos at redhat dot com 2022-12-14 21:50 ` dj at redhat dot com 2022-12-15 10:29 ` nsz at gcc dot gnu.org 2022-12-15 10:45 ` nsz at gcc dot gnu.org 2022-12-15 21:44 ` dj at redhat dot com
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