On Mon, Feb 20, 2017 at 10:36:13PM +0800, Coly Li wrote: > On 2017/2/20 下午10:06, Greg KH wrote: > > On Mon, Feb 20, 2017 at 04:12:58AM -0900, Kent Overstreet wrote: > >> On Mon, Feb 20, 2017 at 01:31:37PM +0100, Greg KH wrote: > >>> On Mon, Jan 23, 2017 at 03:54:07PM +0100, Greg KH wrote: > >>>> Kent, any hints? > >>> > >>> Without a response from the maintainer, I can't apply this... > >>> > >>> greg k-h > >> > >> Sorry I missed this - yes, this patch should be safe to apply and it does fix > >> that crash. The relevant code hasn't been changed in ages, 4.4 is definitely > >> fine. > > > > Ok, I've queued this up for 4.9, but for 4.4 it does not apply. Coly, > > can you provide a working backport for 4.4-stable? > > Greg, > > It is because the 'commit 29e6c57cc78e ("bcache: bch_gc_thread() is not > freezable")' remove a "try_to_freeze()" in bch_gc_thread(), which > happens in v4.7. > > I just rebase Kent's fix to v4.4 kernel, solve the conflict. Could you > please check and try the attached patch ? That worked, thanks! greg k-h