Date: Thu, 11 Oct 2001 19:10:38 +0200 From: Patrick Cipiere <Patrick.Cipiere@UDcast.com> To: freebsd-hackers@freebsd.org Subject: contigfree, free what? Message-ID: <200110111710.f9BHAcW24404@ra.udcast.com>
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We are currently working with FreeBSD 4.3 and we found out that
kldloading/kldunloading modules working with contigmalloc()/contigfree()
like if_xl.ko produces a memory leak.
This is due to the contigfree() function which seems to uncompletely release
the memory ressource allocated in vm_page_array.
When contigmalloc() steps in vm_page_array, it does not find back
the pages previously released by contigfree()
The loop vm/vm_page.c is this one:
for (i = start; i < cnt.v_page_count; i++) {
int pqtype;
phys = VM_PAGE_TO_PHYS(&pga[i]);
pqtype = pga[i].queue - pga[i].pc;
if (pqtype == PQ_FREE
It fails on the `pqtype == PQ_FREE' test
and the previously allocated (and supposedly released by contigfree)
pages can't be reallocated.
Anyone has a patch?
Thanx,
Patrick.
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