linux-kernel - Re: [ANNOUNCE] 4.8-rc5-rt1 beta

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Date:   Thu, 08 Sep 2016 07:47:40 +0200
From:   Mike Galbraith <umgwanakikbuti@...il.com>
To:     Paul Gortmaker <paul.gortmaker@...driver.com>,
        linux-rt-users <linux-rt-users@...r.kernel.org>
Cc:     LKML <linux-kernel@...r.kernel.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Sebastian Andrzej Siewior <bigeasy@...utronix.de>,
        Steven Rostedt <rostedt@...dmis.org>
Subject: Re: [ANNOUNCE] 4.8-rc5-rt1 beta

On Tue, 2016-09-06 at 14:25 -0400, Paul Gortmaker wrote:

>   Patch conflicts/issues of interest 4.6 --> 4.7
>   ----------------------------------------------
> 
> -v4.7 introduced a lot of users of down_write_killable which wasn't
>  implemented for -rt (rwsem_rt.h), so I created one.  (see new patch
>  rt-create-down_write_killable.patch -- local commit 14625e96ff085f),
>  it probably warrants a look see from other people smarter than me.

You forgot nested, so btrfs won't build.  I posted a patchlet here that
includes it.

> -Al Viro added a 2nd user of down_read_non_owner into NFS unlink.
>  Previously it was just bcache and Sebastian just made that depend on
>  !RT_FULL (md-disable-bcache.patch).  So we'll need to decide what to
>  with that; I just ignored NFS for now, since it is horrible anyway.
>  (see upstream commit 884be175351e73c)

Yeah, that is annoying.  I've been carrying a revert ever since, with
poke nfs on todo, but it seems to be marooned there (haven't even
gotten around to generating the first obligatory explosion).

	-Mike