Date: Wed, 16 Apr 2014 14:23:41 -0700 From: Navdeep Parhar <np@FreeBSD.org> To: freebsd-hackers@freebsd.org, Jeff Roberson <jeff@FreeBSD.org> Subject: vmem(9) with M_FIRSTFIT Message-ID: <534EF4DD.4000200@FreeBSD.org>
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I'm trying to use vmem with M_FIRSTFIT strategy but it causes an
assertion failure in vmem_xalloc. The problem is that qc_import sets
M_BESTFIT in the flags passed to it before passing them on to
vmem_xalloc. vmem_xalloc then complains because both FIRSTFIT and
BESTFIT are set.
Does anyone know why qc_import insists on M_BESTFIT? Is it safe to
change it as shown here?
if ((flags & VMEM_FITMASK) == 0)
flags |= M_BESTFIT;
Regards,
Navdeep
(kgdb) p panicstr
$4 = 0xffffffff814ed960 "Assertion strat == M_BESTFIT || strat ==
M_FIRSTFIT failed at /usr/src/sys/kern/subr_vmem.c:1113"
(kgdb) bt
...
#10 0xffffffff808e2a38 in kassert_panic (fmt=<value optimized out>) at
/usr/src/sys/kern/kern_shutdown.c:644
#11 0xffffffff80931ac4 in vmem_xalloc (vm=0xfffff800cc1dd000,
size0=<value optimized out>, align=0, phase=0,
nocross=0, minaddr=0, maxaddr=<value optimized out>, flags=<value
optimized out>, addrp=0x12)
at /usr/src/sys/kern/subr_vmem.c:1113
#12 0xffffffff80933bcc in qc_import (arg=0xfffff800cc1dd488,
store=0xfffff800475a6418, cnt=125,
flags=<value optimized out>) at /usr/src/sys/kern/subr_vmem.c:507
#13 0xffffffff80b5ee00 in uma_zalloc_arg (zone=0xfffff8001345d480,
udata=0x0, flags=4097)
at /usr/src/sys/vm/uma_core.c:2535
#14 0xffffffff809319e9 in vmem_alloc (vm=0xfffff800cc1dd000, size=<value
optimized out>, flags=4097,
addrp=0xfffffe0238422868) at uma.h:336
#15 0xffffffff809a955c in do_setopt_tx_throttle (so=0xfffff80047b95000,
sopt=<value optimized out>)
at /usr/src/sys/net/flow_throttle.c:379
...
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