Re: lock order reversal

[Daniel C. Sobral]

Kris Kennaway wrote:

On Mon, Jan 06, 2003 at 06:56:39PM +0100, Ulrich Spoerlein wrote:

>On 2003/01/05-00:25:17 leafy wrote:
>
>
>>lock order reversal
>>Jan  5 00:19:15 leafy kernel: 1st 0xc26b05c0 process lock (process lock)
>>@/usr/src/sys/kern/kern_descrip.c:2099 Jan  5 00:19:15 leafy kernel: 2nd
>>0xc2667e34 filedesc structure (filedesc structure) @
>>/usr/src/sys/kern/kern_descrip.c:2106
>>
>>The kernel is only about 40 mins old.


This is known and regularly reported here.


>i got another LOR when starting up Quake2 (but only once every boot):
>acquiring duplicate lock of same type: "pcm channel"
> 1st pcm0:record:0 @ /usr/src/sys/dev/sound/pcm/sound.c:191
> 2nd pcm0:play:0 @ /usr/src/sys/dev/sound/pcm/sound.c:191


Don't know about this one.

What about this?

lock order reversal
1st 0xc25afac0 pcm0 (sound softc) @ /usr/src/sys/dev/sound/pci/cmi.c:520
2nd 0xc25af6c0 pcm0:play:0 (pcm channel) @ /usr/src/sys/dev/sound/pcm/channel.c:441

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