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Date:	Mon, 30 Jun 2014 16:17:41 -0400
From:	Tejun Heo <>
To:	Jens Axboe <>
Cc:	"Michael S. Tsirkin" <>,
	Christoph Hellwig <>,
	Josh Boyer <>,
	Rusty Russell <>,,
	"Linux-Kernel@...r. Kernel. Org" <>,
	Brian Lane <>,
	John McCutchan <>,
	Robert Love <>,
	Eric Paris <>,
	Greg Kroah-Hartman <>
Subject: Re: virt_blk BUG: sleeping function called from invalid context

On Sun, Jun 29, 2014 at 02:55:36PM -0600, Jens Axboe wrote:
> > commit d911d98748018f7c8facc035ba39c30f5cce6f9c
> > Author: Tejun Heo <>
> > Date:   Wed Apr 9 11:07:31 2014 -0400
> > 
> >     kernfs: make kernfs_notify() trigger inotify events too
> > 
> > Tejun, what do you think?
> > 
> > Josh, Brian, could you try reverting that commit to see if it helps?
> That definitely be a bug. If you need to block off ->bi_end_io(), just
> must punt to a worker thread.

Ugh... didn't realize we had users triggering sysfs notifications from
an atomic context.  fsnotify support requires sleepable context.
Guess I'll have to punt it to a work item. :(


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