[Bug malloc/14581] glibc leaks memory and do not reuse after free (leading to unlimited RSS growth)

[dev at parallels dot com]

http://sourceware.org/bugzilla/show_bug.cgi?id=14581

--- Comment #3 from Kirill Korotaev <dev at parallels dot com> 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.

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