svn commit: r206140 - head/sys/vm
Rui Paulo
rpaulo at freebsd.org
Mon Apr 5 13:58:59 UTC 2010
Hi,
On 3 Apr 2010, at 17:20, Alan Cox wrote:
> Author: alc
> Date: Sat Apr 3 16:20:22 2010
> New Revision: 206140
> URL: http://svn.freebsd.org/changeset/base/206140
>
> Log:
> Re-enable the call to pmap_release() by vmspace_dofree(). The accounting
> problem that is described in the comment has been addressed.
>
> Submitted by: kib
> Tested by: pho (a few months ago)
> MFC after: 6 weeks
>
> Modified:
> head/sys/vm/vm_map.c
>
> Modified: head/sys/vm/vm_map.c
> ==============================================================================
> --- head/sys/vm/vm_map.c Sat Apr 3 15:52:32 2010 (r206139)
> +++ head/sys/vm/vm_map.c Sat Apr 3 16:20:22 2010 (r206140)
> @@ -313,6 +313,7 @@ vm_init2(void)
> static inline void
> vmspace_dofree(struct vmspace *vm)
> {
> +
> CTR1(KTR_VM, "vmspace_free: %p", vm);
>
> /*
> @@ -329,12 +330,8 @@ vmspace_dofree(struct vmspace *vm)
> (void)vm_map_remove(&vm->vm_map, vm->vm_map.min_offset,
> vm->vm_map.max_offset);
>
> - /*
> - * XXX Comment out the pmap_release call for now. The
> - * vmspace_zone is marked as UMA_ZONE_NOFREE, and bugs cause
> - * pmap.resident_count to be != 0 on exit sometimes.
> - */
> -/* pmap_release(vmspace_pmap(vm)); */
> + pmap_release(vmspace_pmap(vm));
> + vm->vm_map.pmap = NULL;
> uma_zfree(vmspace_zone, vm);
> }
>
Unfortunately, this causes a panic on MIPS. I don't know enough about the VM subsystem to help with fixing this but if you want me to investigate something, I can do it.
NFS ROOT: 192.168.5.1:/zoo/rpaulo/millipede1
warning: no time-of-day clock registered, system time will not be set accurately
warning: no time-of-day clock registered, system time will not be set accurately
Interface rge1 IP-Address 192.168.5.16 Broadcast 192.168.5.255
panic: lock "pmap" 0xc6c320dc already initialized
KDB: enter: panic
[ thread pid 31 tid 100042 ]
Stopped at kdb_enter+0x50: lui at,0x8047
db> bt
Tracing pid 31 tid 100042 td 0xc829e260
db_trace_thread+30 (?,?,?,?) ra 8011ee48 sp d37ed820 sz 24
8011ed2c+11c (0,?,ffffffff,?) ra 8011e4f0 sp d37ed838 sz 32
8011e15c+394 (?,?,?,?) ra 8011e680 sp d37ed858 sz 168
db_command_loop+78 (?,?,?,?) ra 80120c98 sp d37ed900 sz 24
80120b90+108 (?,?,?,?) ra 80227c74 sp d37ed918 sz 424
kdb_trap+10c (?,?,?,?) ra 8038b8fc sp d37edac0 sz 32
trap+b88 (?,?,?,?) ra 80383fa8 sp d37edae0 sz 168
MipsKernGenException+10c (0,a,804c2fe4,109) ra 80227ecc sp d37edb88 sz 200
kdb_enter+50 (?,?,?,?) ra 801f2184 sp d37edc50 sz 24
panic+f8 (?,803fb4e0,c6c320dc,c6c320dc) ra 80228a74 sp d37edc68 sz 40
lock_init+30 (?,?,?,?) ra 801e2114 sp d37edc90 sz 24
mtx_init+100 (?,?,?,?) ra 80386fd4 sp d37edca8 sz 32
pmap_pinit+34 (?,?,?,?) ra 8036dab8 sp d37edcc8 sz 48
vmspace_alloc+48 (?,?,?,?) ra 8036dc08 sp d37edcf8 sz 32
vmspace_fork+58 (c6c320f0,d37edd78,?,?) ra 801c7240 sp d37edd18 sz 72
fork1+234 (?,?,?,d37eddc8) ra 801c845c sp d37edd60 sz 88
fork+20 (?,?,?,?) ra 8038b694 sp d37eddb8 sz 32
trap+920 (?,?,?,?) ra 80384174 sp d37eddd8 sz 168
MipsUserGenException+10c (?,?,?,501dbd30) ra 0 sp d37ede80 sz 0
pid 31
db> ps
pid ppid pgrp uid state wmesg wchan cmd
31 17 17 0 R+ CPU 0 sh
18 0 0 0 SL - 0x8047b804 [nfsiod 0]
17 1 17 0 Ss+ wait 0xc82a1590 sh
16 0 0 0 DL - 0x80471354 [schedcpu]
15 0 0 0 DL syncer 0x80476d14 [syncer]
9 0 0 0 DL vlruwt 0xc82a4000 [vnlru]
8 0 0 0 DL psleep 0x80476a3c [bufdaemon]
7 0 0 0 DL pgzero 0x8047c95c [pagezero]
6 0 0 0 DL psleep 0x8047c588 [pagedaemon]
5 0 0 0 DL ccb_scan 0x8046b57c [xpt_thrd]
14 0 0 0 WL [msg_intr0]
13 0 0 0 DL (threaded) [usb]
100021 D - 0xc6cb0d0c [usbus0]
100020 D - 0xc6cb0cdc [usbus0]
100019 D - 0xc6cb0cac [usbus0]
100018 D - 0xc6cb0c7c [usbus0]
12 0 0 0 DL - 0x80471354 [yarrow]
4 0 0 0 DL - 0x8046f280 [g_down]
3 0 0 0 DL - 0x8046f27c [g_up]
2 0 0 0 DL - 0x8046f274 [g_event]
11 0 0 0 RL (threaded) [intr]
100031 I [hard intr35: mskc]
100030 I [hard intr32: rge]
100029 I [hard intr31: rge]
100028 I [hard intr30: rge]
100027 I [hard intr29: rge]
100026 I [hard intr28: rge]
100025 I [hard intr27: rge]
100024 I [hard intr26: rge]
100022 I [hard intr25: rge]
100017 I [hard intr39: ehci]
100016 I [swi0: uart]
100015 I [swi6: Giant taskq]
100013 I [swi5: +]
100011 I [swi2: cambio]
100010 I [swi6: task queue]
100005 RunQ [swi4: clock]
100004 I [swi3: vm]
100003 I [swi1: netisr 0]
10 0 0 0 RL [idle]
1 0 1 0 SLs wait 0xc6c2f000 [init]
0 0 0 0 DLs (threaded) [kernel]
100014 D - 0xc6c99080 [thread taskq]
100012 D - 0xc6c99140 [kqueue taskq]
100000 D sched 0x8046f2d8 [swapper]
Regards,
--
Rui Paulo
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