#5278: [with code snippet, needs testing] On modern fedora 64 installs, sage
exists frequently when omalloc thinks there is no memory left
---------------------+------------------------------------------------------
Reporter: was | Owner: cwitty
Type: defect | Status: new
Priority: blocker | Milestone: sage-3.3
Component: misc | Keywords:
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Comment(by GeorgSWeber):
There is even this evil doing:
{{{
#define malloc mALLOc
}}}
Anyway, I have an idea I'd like to test, but using the time shift, you in
America might be faster. It's replacing the lines 1371-1374 of the file
"omMalloc.c" (that seems to be the one of three almost identical files
that is actually compiled):
{{{
/* Try to extend */
malloc_extend_top(nb);
if ( (remainder_size = chunksize(top) - nb) < (long)MINSIZE)
return 0; /* propagate failure */
}}}
with the following lines of code:
{{{
/* Try to extend */
malloc_extend_top(nb);
if ( (remainder_size = chunksize(top) - nb) < (long)MINSIZE)
{
#if HAVE_MMAP
/* On failure try to use mmap (again, or if small: for the first
time!) */
if ((victim = mmap_chunk(nb)) != 0)
{
return chunk2mem(victim);
}
#endif
return 0; /* propagate failure */
}
}}}
Unfortunately, I didn't find it easy to provide a "real" patch via
hg/diff.
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/5278#comment:8>
Sage <http://sagemath.org/>
Sage - Open Source Mathematical Software: Building the Car Instead of
Reinventing the Wheel
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