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libbacktrace patch committed: Only keep 16 entries on free list

From: Ian Lance Taylor <iant at golang dot org>
To: gcc-patches <gcc-patches at gcc dot gnu dot org>
Date: Wed, 24 Jan 2018 18:24:50 -0800
Subject: libbacktrace patch committed: Only keep 16 entries on free list
Authentication-results: sourceware.org; auth=none

PR 68239 points out that libbacktrace can sometimes take a long time
scanning the list of free memory blocks looking for one that is large
enough.  Since the libbacktrace memory allocator does not have to be
perfect in practice, only keep the 16 largest entries on the free
list.  Bootstrapped and ran libbacktrace and libgo tests on
x86_64-pc-linux-gnu.  Committed to mainline.

Ian

2018-01-24  Ian Lance Taylor  <iant@golang.org>

PR other/68239
* mmap.c (backtrace_free_locked): Don't put more than 16 entries
on the free list.

Attachment: patch.txt
Description: Text document

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