Re: 2.4.20: Proccess stuck in __lock_page ...

[manish <manish@storadinc.com>]

Marc-Christian Petersen wrote:

>On Tuesday 27 May 2003 22:20, Andrea Arcangeli wrote:
>
>Hi Andrea,
>
>
>>>1. Stock 2.4.20
>>>2. 2.4.20 with the io_request_lock removed.
>>>The tests on the first one are still going. The tests on the second one
>>>showed processes getting stuck for long times (> 5 minutes) and not
>>>paused ...
>>>
>>sorry if it's a dumb question but what is the "io_request_lock removed"
>>thing? Hope you didn't delete any io_request_lock, if you did you can
>>get worse things than crashes (i.e. mm/fs corruption). the pausing bug
>>was a genuine race (quite innocent, if you could trigger a disk unplug
>>you could recover from it)
>>
>>Andrea
>>
>funny. I asked him the same ;)
>
>see his response:
>
>-----------------------------------------------------------------------
>
>>what is this io_request_lock patch you are talking about?
>>
>>ciao, Marc
>>
>We made some changes to the 2.4.20 kernel to remove the io_request_lock 
>and replace with queue_lock and host_lock.
>-----------------------------------------------------------------------
>
>ciao, Marc
>
We made a change in the 2.4.20 kernel to remove the io_request_lock and 
replace with the host_lock and the queue_lock.  Probably, not a right 
thing to do

Thanks
Manish