linux-kernel - Re: [PATCH AUTOSEL 5.0 59/66] fs: stream_open - opener for stream-like files so that read and write can run simultaneously without deadlock

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Message-ID: <20190424170211.GA4253@kroah.com>
Date:   Wed, 24 Apr 2019 19:02:11 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     Linus Torvalds <torvalds@...ux-foundation.org>
Cc:     Sasha Levin <sashal@...nel.org>,
        Linux List Kernel Mailing <linux-kernel@...r.kernel.org>,
        stable <stable@...r.kernel.org>,
        Kirill Smelkov <kirr@...edi.com>,
        Michael Kerrisk <mtk.manpages@...il.com>,
        Yongzhi Pan <panyongzhi@...il.com>,
        Jonathan Corbet <corbet@....net>,
        David Vrabel <david.vrabel@...rix.com>,
        Juergen Gross <jgross@...e.com>,
        Miklos Szeredi <miklos@...redi.hu>, Tejun Heo <tj@...nel.org>,
        Kirill Tkhai <ktkhai@...tuozzo.com>,
        Arnd Bergmann <arnd@...db.de>, Christoph Hellwig <hch@....de>,
        Julia Lawall <Julia.Lawall@...6.fr>,
        Nikolaus Rath <Nikolaus@...h.org>,
        Han-Wen Nienhuys <hanwen@...gle.com>,
        linux-fsdevel <linux-fsdevel@...r.kernel.org>
Subject: Re: [PATCH AUTOSEL 5.0 59/66] fs: stream_open - opener for
 stream-like files so that read and write can run simultaneously without
 deadlock

On Wed, Apr 24, 2019 at 09:40:53AM -0700, Linus Torvalds wrote:
> On Wed, Apr 24, 2019 at 9:34 AM Greg Kroah-Hartman
> <gregkh@...uxfoundation.org> wrote:
> >
> > I think there is a follow-on patch for this one as well, that adds the
> > proper "stream open" logic to all of the individual locations.
> 
> That bulk one hasn't been applied yet, and wouldn't be appropriate for
> stable anyway. It's 5.2 material.

Ah, ok.

> But...
> 
> > But even with that, I don't think this is stable material, it should
> > just be for 5.1 and newer kernels.
> 
> We likely *will* have a fuse-only patch that uses stream_open() and
> _will_ be marked for stable, but that hasn't actually happened yet
> either. But if/when that happens, then this infrastructure patch will
> indeed be needed in stable.

Ok, I'll add this to my list of things to apply sometime in the future
when it shows up.

thanks,

greg k-h