#5278: [with code snippet, needs testing] On modern fedora 64 installs, sage
exists frequently when omalloc thinks there is no memory left
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Reporter: was | Owner: cwitty
Type: defect | Status: new
Priority: blocker | Milestone: sage-3.4
Component: misc | Keywords:
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Comment(by GeorgSWeber):
For the record:
It is plausibe that the underlying problem is the same one as the one
underlying ticket #3760: namely that the dlmalloc v2.6.5 from 1998 that
Singular/omalloc rely on is simply too old and does not work well on
certain modern systems.
I have seen both in the code as well as in historical comments from newer
dlmalloc versions that dlmalloc v2.6.5, if sbrk() does not give it more
memory, would *not* try to use mmap() as a backup. Only from v2.7.0 on,
dlmalloc does this.
This would make up a perfect explanation for the problem described here!
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/5278#comment:11>
Sage <http://sagemath.org/>
Sage - Open Source Mathematical Software: Building the Car Instead of
Reinventing the Wheel
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