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Re: VirtualBox Hangs Pre-Init Due To Ext2FS Fault

From: Richard Braun
Subject: Re: VirtualBox Hangs Pre-Init Due To Ext2FS Fault
Date: Sun, 19 Jul 2015 16:00:33 +0200
User-agent: Mutt/1.5.23 (2014-03-12)

On Sun, Jul 19, 2015 at 02:25:14PM +0100, James Clarke wrote:
> Yeah, I tried inhibiting both buckets, but the paging RPCs still got through, 
> so my guess was that libports's inhibit/resume methods weren't able to deal 
> with libpager's own threads. The thing is I don't think we currently keep 
> track of any reference to the main/worker threads, as pager_start_workers 
> just takes a bucket and returns void. Is there a way we can instead make the 
> main thread and/or workers able to block ports_inhibit_X_rpcs like normal RPC 
> handlers and be cancelled etc? If possible I think that would be a cleaner 
> solution.

To continue our discussion on IRC:

No, it would definitely not be a cleaner solution, just an ugly hack.
Since paging doesn't occur as part of an RPC, you just can't use RPC
stuff to manage it. I suggest building rwlock-based synrchonization
functions specific to the pager workers.

Richard Braun

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