[dm-devel] Re: [PATCH 2.6.19 5/5] fs: freeze_bdev with semaphore not mutex

[Pavel Machek]

Hi!

> > > This is from a work queue, so in fact from a process context, but from
> > > a process that is running with PF_NOFREEZE.
> > 
> > Why not simply &~ PF_NOFREEZE on that particular process? Filesystems
> > are free to use threads/work queues/whatever, but refrigerator should
> > mean "no writes to filesystem" for them...
> 
> But how we differentiate worker_threads used by filesystems from the
> other ones?

I'd expect filesystems to do &~ PF_NOFREEZE by hand.

> BTW, I think that worker_threads run with PF_NOFREEZE for a reason,
> but what exactly is it?

I do not think we had particulary good reasons...
									Pavel
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