lock order reversal status page

Jon Noack noackjr at alumni.rice.edu
Mon May 3 20:12:51 UTC 2004


On 5/3/2004 2:39 PM, Bjoern A. Zeeb wrote:
> On Mon, 3 May 2004, Brian Fundakowski Feldman wrote:
>>Jon Noack <noackjr at alumni.rice.edu> wrote:
>>> Bjoern Zeeb put together a lock order reversal page so that
>>> people can check the status of LORs:
>>> http://sources.zabbadoz.net/freebsd/lor.html
>>> 
>>> I think it would be great if we could get it put up on the
>>> FreeBSD.org site. We could then put a link to it in the source to
>>> cut down on list noise. I assume the best place to put it would
>>> be under the FAQ section. Do you agree that this is a good idea?
>>> If so, what do we (I) need to do to get this done?
>> 
>> What is your opinion of a good way to put it in the "lock order
>> reversal" output without making it either lost in the noise or
>> confuse people as to its intent?
> 
> < SCNR >
> put it in in bold <b>http://..../</b>
> < /SCNR >
> 
> I do not like the idea to have an URL in the kernel sources but maybe
> the only way one may see this is s.th. like:
> 
> --- dmesg excerpt ---
> lock order reversal
> ------------------------------------------------------------
> please first read this before submitting PR or posting:
> http://..../
> ------------------------------------------------------------
>  1st 0xc5a585ac vm object (vm object) @ sys/vm/swap_pager.c:1313
>  2nd 0xc095d800 swap_pager swhash (swap_pager swhash) @ sys/vm/swap_pager.c:1803
>  3rd 0xc1040948 vm object (vm object) @ sys/vm/uma_core.c:886
> Stack backtrace:
> ...
> --- trap 0x1, eip = 0, esp = 0xd747cd7c, ebp = 0 ---
> --- /dmesg excerpt ---

I was thinking something like this:
--- dmesg excerpt --
lock order reversal
Check http://..../ before reporting
  1st 0xc5a585ac vm object (vm object) @ sys/vm/swap_pager.c:1313
...
--- /dmesg excerpt ---

Jon



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