Re: [RFC, PATCH] filesystem freeze: fix sys_umount induced perpetual freeze

[Christoph Hellwig]

On Thu, Aug 27, 2009 at 07:11:29PM +0900, Fernando Luis V?zquez Cao wrote:
> Thank you for the pointers. I gave those patches a spin, but it seems
> the umount case is not being tackled. I suggest rejecting the umount
> for frozen filesystems. What do you think?
> 
> I will be replying to this email with a forward port of your patches
> along with my own patches that fix the locking for umount and add a
> new ioctl to check the freeze state of the filesystem (this is helpful
> to create clean resource agents for HA solutions).

I think we should just reject the umount for a forzen filesystem with
-EBUSY like I do for remount in those patches.  I somehow thought I did
this but didn't.  Is that good for your use case?

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