Re: init scripts problems ?

denis bonnenfant wrote:
> denis bonnenfant wrote:
> 
>>> I've just checked the enbd_open() code and I see nothing suspicious
>>> there _except_ maybe the "media check" that is launched in the kernel:
>>>
>>>         if (do_media_check) {
>>>                         // PTB this invalidates buffers, if necessary
>>>                         ENBD_INFO ("DISK CHECK wanted in open on 
>>> device nd%s\n",
>>>                                 lo->devnam);
>>>                         lo->last_checked = jiffies;
>>>                         check_disk_change(inode->i_bdev);
>>>         }
>>>
>>>
>>> It may be worth disabling that whole check and seeing what happens. As
>>> I recall the kernel tries to read the partition table (the first
>>> sectors) of the "disk" (enbd) and then adds the result to
>>> /proc/partitions.
>>
>>
>>>
>>> But I'm not even sure the code sticks in OPEN, rather than at the first
>>> read. The WCHAN value might indicate.
> 
> 
> OK, i can reproduce it, even with only one nbd device open.
> 
> in this case, WCHAN is page_sync for one enbd-client, and select for the 
> others.

oups, it's sync_page !

> 
> echo 0 > /proc/nbdinfo sometimes solves the problem, but sometimes give 
> kernel oops... sometime recoverable removing the module, sometime not.
> 
> I will send some logs later
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