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Fix a memory corruption bug in chunk_alloc_dss().

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Fix a memory corruption bug in chunk_alloc_dss() that was due to
claiming newly allocated memory is zeroed.

Reverse order of preference between mmap() and sbrk() to prefer mmap().

Clean up management of 'zero' parameter in chunk_alloc*().
This commit is contained in:
Jason Evans
2012-04-21 13:33:48 -07:00
parent 606f1fdc3c
commit 8f0e0eb1c0
6 changed files with 20 additions and 15 deletions
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4
doc/jemalloc.xml.in
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@@ -444,9 +444,9 @@ for (i = 0; i < nbins; i++) {
suboptimal for several reasons, including race conditions, increased
fragmentation, and artificial limitations on maximum usable memory. If
<option>--enable-dss</option> is specified during configuration, this
allocator uses both <citerefentry><refentrytitle>sbrk</refentrytitle>
allocator uses both <citerefentry><refentrytitle>mmap</refentrytitle>
<manvolnum>2</manvolnum></citerefentry> and
<citerefentry><refentrytitle>mmap</refentrytitle>
<citerefentry><refentrytitle>sbrk</refentrytitle>
<manvolnum>2</manvolnum></citerefentry>, in that order of preference;
otherwise only <citerefentry><refentrytitle>mmap</refentrytitle>
<manvolnum>2</manvolnum></citerefentry> is used.</para>