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From: Ingo Molnar <mingo@kernel.org>
To: Thomas Gleixner <tglx@linutronix.de>
Cc: Christoph Hellwig <hch@lst.de>,
	x86@kernel.org, tedheadster@gmail.com, konrad.wilk@oracle.com,
	iommu@lists.linux-foundation.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] x86: enable swiotlb for > 4GiG ram on 32-bit kernels
Date: Sun, 14 Oct 2018 11:04:33 +0200	[thread overview]
Message-ID: <20181014090433.GA28319@gmail.com> (raw)
In-Reply-To: <alpine.DEB.2.21.1810141055440.1438@nanos.tec.linutronix.de>


* Thomas Gleixner <tglx@linutronix.de> wrote:

> On Sun, 14 Oct 2018, Christoph Hellwig wrote:
> 
> > On Sun, Oct 14, 2018 at 10:13:31AM +0200, Thomas Gleixner wrote:
> > > On Sun, 14 Oct 2018, Christoph Hellwig wrote:
> > > 
> > > > We already build the swiotlb code for 32b-t kernels with PAE support,
> > > > but the code to actually use swiotlb has only been enabled for 64-bit
> > > > kernel for an unknown reason.
> > > > 
> > > > Before Linux 4.18 we papers over this fact because the networking code,
> > > > the scsi layer and some random block drivers implenented their own
> > > > bounce buffering scheme.
> > > > 
> > > > Fixes: 21e07dba ("scsi: reduce use of block bounce buffers")
> 
> Please use the first 12 characters of the commit SHA for fixes tags in the
> future, as documented. No need to resend, I fixed it up for you and added a
> Cc: stable as well

For those who have their ~/.gitconfig's from ancient Git history, this can be done via:

	git config --global core.abbrev 12

Thanks,

	Ingo

WARNING: multiple messages have this Message-ID (diff)
From: Ingo Molnar <mingo-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
To: Thomas Gleixner <tglx-hfZtesqFncYOwBW4kG4KsQ@public.gmane.org>
Cc: konrad.wilk-QHcLZuEGTsvQT0dZR+AlfA@public.gmane.org,
	x86-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org,
	linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
	tedheadster-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org,
	iommu-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org,
	Christoph Hellwig <hch-jcswGhMUV9g@public.gmane.org>
Subject: Re: [PATCH] x86: enable swiotlb for > 4GiG ram on 32-bit kernels
Date: Sun, 14 Oct 2018 11:04:33 +0200	[thread overview]
Message-ID: <20181014090433.GA28319@gmail.com> (raw)
In-Reply-To: <alpine.DEB.2.21.1810141055440.1438-ecDvlHI5BZPZikZi3RtOZ1XZhhPuCNm+@public.gmane.org>


* Thomas Gleixner <tglx-hfZtesqFncYOwBW4kG4KsQ@public.gmane.org> wrote:

> On Sun, 14 Oct 2018, Christoph Hellwig wrote:
> 
> > On Sun, Oct 14, 2018 at 10:13:31AM +0200, Thomas Gleixner wrote:
> > > On Sun, 14 Oct 2018, Christoph Hellwig wrote:
> > > 
> > > > We already build the swiotlb code for 32b-t kernels with PAE support,
> > > > but the code to actually use swiotlb has only been enabled for 64-bit
> > > > kernel for an unknown reason.
> > > > 
> > > > Before Linux 4.18 we papers over this fact because the networking code,
> > > > the scsi layer and some random block drivers implenented their own
> > > > bounce buffering scheme.
> > > > 
> > > > Fixes: 21e07dba ("scsi: reduce use of block bounce buffers")
> 
> Please use the first 12 characters of the commit SHA for fixes tags in the
> future, as documented. No need to resend, I fixed it up for you and added a
> Cc: stable as well

For those who have their ~/.gitconfig's from ancient Git history, this can be done via:

	git config --global core.abbrev 12

Thanks,

	Ingo

  reply	other threads:[~2018-10-14  9:06 UTC|newest]

Thread overview: 24+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-10-14  7:52 [PATCH] x86: enable swiotlb for > 4GiG ram on 32-bit kernels Christoph Hellwig
2018-10-14  7:52 ` Christoph Hellwig
2018-10-14  8:13 ` Thomas Gleixner
2018-10-14  8:13   ` Thomas Gleixner
2018-10-14  8:14   ` Christoph Hellwig
2018-10-14  8:14     ` Christoph Hellwig
2018-10-14  8:57     ` Thomas Gleixner
2018-10-14  8:57       ` Thomas Gleixner
2018-10-14  9:04       ` Ingo Molnar [this message]
2018-10-14  9:04         ` Ingo Molnar
2018-10-14 12:49         ` tedheadster
2018-10-14  9:18 ` [tip:x86/urgent] x86/swiotlb: Enable " tip-bot for Christoph Hellwig
2018-10-15  9:09 ` tip-bot for Christoph Hellwig
2018-10-15 18:52 ` [PATCH] x86: enable " Konrad Rzeszutek Wilk
2018-10-15 18:52   ` Konrad Rzeszutek Wilk
     [not found] ` <20181014075208.2715-1-hch-jcswGhMUV9g@public.gmane.org>
2018-10-16 13:11   ` tedheadster
     [not found]     ` <CAP8WD_Zj5aMcTCVtV-hot3zLNfNuMzHyeogm0Lqb=+XZ1LdkKw-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2018-10-17 10:16       ` Thomas Gleixner
2018-10-17 16:33       ` Christoph Hellwig
     [not found]         ` <20181017163351.GA23719-jcswGhMUV9g@public.gmane.org>
2018-10-17 17:41           ` tedheadster
     [not found]             ` <CAP8WD_boL-DxEXxa-ci382Ff8yTdMS9T+sy2Y0-LEX-WPc8L_g-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2018-10-18 12:51               ` Christoph Hellwig
     [not found]                 ` <20181018125116.GA24676-jcswGhMUV9g@public.gmane.org>
2018-10-19  1:00                   ` tedheadster
     [not found]                     ` <CAP8WD_Z2XvLsqimSnODwr5gj6GRuzh4SMKN56n6Y0JzufG=E8A-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2018-10-19  5:51                       ` Ingo Molnar
2018-10-18  6:12       ` Ingo Molnar
2018-10-19  5:54 ` [tip:x86/urgent] x86/swiotlb: Enable swiotlb for > 4GiG RAM " tip-bot for Christoph Hellwig

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