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From: "fweimer at redhat dot com" <sourceware-bugzilla@sourceware.org>
To: glibc-bugs@sourceware.org
Subject: [Bug malloc/30723] Repeated calls posix_memalign calls produce long
 free lists, high fragmentation
Date: Wed, 09 Aug 2023 18:54:43 +0000
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X-Bugzilla-Product: glibc
X-Bugzilla-Component: malloc
X-Bugzilla-Version: 2.38
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Message-ID: <bug-30723-131-Bg4ODfenWK@http.sourceware.org/bugzilla/>
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https://sourceware.org/bugzilla/show_bug.cgi?id=3D30723

Florian Weimer <fweimer at redhat dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |ASSIGNED
            Summary|posix_memalign performance  |Repeated calls
                   |regression in glibc-2.38    |posix_memalign calls
                   |(since                      |produce long free lists,
                   |24cdd6c71debfd10a9f7cb217fe |high fragmentation
                   |2a2c4c486ed6f?)             |
     Ever confirmed|0                           |1
   Last reconfirmed|                            |2023-08-09
                 CC|                            |fweimer at redhat dot com
           Assignee|unassigned at sourceware dot org   |fweimer at redhat d=
ot com

--- Comment #1 from Florian Weimer <fweimer at redhat dot com> ---
Patch posted:

[PATCH] malloc: Enable merging of remainders in memalign (bug 30723)
<https://inbox.sourceware.org/libc-alpha/877cq4yrpg.fsf@oldenburg.str.redha=
t.com/T/>

We may need additional heuristics to bound the free list scanning.

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