Re: FAILED: patch "[PATCH] mm, vmscan: Do not wait for page writeback for GFP_NOFS" failed to apply to 4.1-stable tree

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On Thu 13-08-15 19:35:03, Greg KH wrote:
> On Thu, Aug 13, 2015 at 04:24:10PM -0700, Hugh Dickins wrote:
> > On Thu, 13 Aug 2015, gregkh@xxxxxxxxxxxxxxxxxxx wrote:
> > > 
> > > The patch below does not apply to the 4.1-stable tree.
> > > If someone wants it applied there, or to any other stable or longterm
> > > tree, then please email the backport, including the original git commit
> > > id to <stable@xxxxxxxxxxxxxxx>.
> > > 
> > > thanks,
> > > 
> > > greg k-h
> > > 
> > ------------ commit in Linus's tree adjusted to 4.1.5 -------------
> 
> Thanks for this.  Should it also be backported to older kernels as well?

Yes 3.9+ would be appreciated as per Hugh's testing 
http://lkml.kernel.org/r/alpine.LSU.2.11.1508032227050.5070%40eggly.anvils
"
And more testing on the history of it, considering your stable 3.6+
designation that I wasn't satisfied with.  Getting out that USB stick
again, I find that 3.6, 3.7 and 3.8 all OOM if their __GFP_IO test
is updated to a may_enter_fs test; but something happened in 3.9
to make it and subsequent releases safe with the may_enter_fs test.
You can certainly argue that the remote chance of a deadlock is
worse than the fair chance of a spurious OOM; but if you insist
on 3.6+, then I think it would have to go back even further,
because we marked that commit for stable itself.  I suggest 3.9+.
"
-- 
Michal Hocko
SUSE Labs
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