Date: Wed, 09 Aug 2006 12:39:44 +0400 From: Andrej Zverev <az@FreeBSD.org> To: FreeBSD-gnats-submit@FreeBSD.org Subject: kern/101689: [panic] kmem_malloc in UMA Message-ID: <E1GAjbM-0002N7-CV@mail.electro-com.ru> Resent-Message-ID: <200608090840.k798eEvq088332@freefall.freebsd.org>
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>Number: 101689
>Category: kern
>Synopsis: [panic] kmem_malloc in UMA
>Confidential: no
>Severity: serious
>Priority: low
>Responsible: freebsd-bugs
>State: open
>Quarter:
>Keywords:
>Date-Required:
>Class: sw-bug
>Submitter-Id: current-users
>Arrival-Date: Wed Aug 09 08:40:13 GMT 2006
>Closed-Date:
>Last-Modified:
>Originator: Andrej Zverev
>Release:
>Organization:
>Environment:
>Description:
I'm trying to create > 20000 vlan interfaces.
#!/usr/bin/perl
for ($i=0; $i<20000; $i++)
{
system ("ifconfig vlan$i create");
system ("ifconfig vlan$i vlan 10 vlandev rl0 10.10.10.10/24");
}
and then system out of memory, panic happens, but it's not right.
Trace of panic attached, if i can provide extra detail, just ask
>How-To-Repeat:
>Fix:
--- trace.txt begins here ---
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Unread portion of the kernel message buffer:
panic: kmem_malloc(4096): kmem_map too small: 83427328 total allocated
Uptime: 16m43s
Dumping 255 MB (2 chunks)
chunk 0: 1MB (160 pages) ... ok
chunk 1: 255MB (65264 pages) 239 223 207 191 175 159 143 127 111 95 79 63 47 31 15
#0 doadump () at pcpu.h:165
165 __asm __volatile("movl %%fs:0,%0" : "=r" (td));
(kgdb)
(kgdb) f 1
#1 0xc064dee1 in boot (howto=260) at ../../../kern/kern_shutdown.c:402
402 doadump();
(kgdb) f 2
#2 0xc064e178 in panic (
fmt=0xc08bb065 "kmem_malloc(%ld): kmem_map too small: %ld total allocated") at ../../../kern/kern_shutdown.c:558
558 boot(bootopt);
(kgdb) f 3
#3 0xc07bc41d in kmem_malloc (map=0xc14430c0, size=4096, flags=2)
at ../../../vm/vm_kern.c:299
299 panic("kmem_malloc(%ld): kmem_map too small: %ld total allocated",
(kgdb) f 4
#4 0xc07b3cea in page_alloc (zone=0xc144d780, bytes=4096, pflag=0x0, wait=2)
at ../../../vm/uma_core.c:958
958 p = (void *) kmem_malloc(kmem_map, bytes, wait);
(kgdb) f 5
#5 0xc07b3821 in slab_zalloc (zone=0xc144d780, wait=2)
at ../../../vm/uma_core.c:823
823 mem = keg->uk_allocf(zone, keg->uk_ppera * UMA_SLAB_SIZE,
(kgdb) f 6
#6 0xc07b4fc0 in uma_zone_slab (zone=0xc144d780, flags=2)
at ../../../vm/uma_core.c:2025
2025 slab = slab_zalloc(zone, flags);
(kgdb) f 7
#7 0xc07b51dc in uma_zalloc_bucket (zone=0xc144d780, flags=2)
at ../../../vm/uma_core.c:2134
2134 flags |= M_NOWAIT;
(kgdb) f 8
#8 0xc07b4e51 in uma_zalloc_arg (zone=0xc144d780, udata=0x0, flags=2)
at ../../../vm/uma_core.c:1942
1942 if (uma_zalloc_bucket(zone, flags)) {
(kgdb) f 9
#9 0xc06437d2 in malloc (size=32, mtp=0xc091c280, flags=2) at uma.h:275
275 return uma_zalloc_arg(zone, NULL, flags);
(kgdb) f 10
#10 0xc066fb4a in ioctl (td=0xc27c9600, uap=0xd0e40d04)
at ../../../kern/sys_generic.c:580
580 memp = malloc((u_long)size, M_IOCTLOPS, M_WAITOK);
(kgdb) f 11
#11 0xc084211b in syscall (frame=
{tf_fs = 59, tf_es = 59, tf_ds = 59, tf_edi = 134581856, tf_esi = -1077940715, tf_ebp = -1077943160, tf_isp = -790360732, tf_ebx = 3, tf_edx = 9, tf_ecx = 7, tf_eax = 54, tf_trapno = 12, tf_err = 2, tf_eip = 672405375, tf_cs = 51, tf_eflags = 642, tf_esp = -1077943188, tf_ss = 59})
at ../../../i386/i386/trap.c:979
979 PTRACESTOP_SC(p, td, S_PT_SCE);
(kgdb) f 12
#12 0xc0830d5f in Xint0x80_syscall () at ../../../i386/i386/exception.s:194
194 movl $KDSEL,%eax /* switch to kernel segments */
Current language: auto; currently asm
(kgdb) f 13
#13 0x00000033 in ?? ()
(kgdb) quit
--- trace.txt ends here ---
>Release-Note:
>Audit-Trail:
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