From: Jason Gunthorpe <jgunthorpe@obsidianresearch.com>
To: Dmitry Torokhov <dtor@chromium.org>
Cc: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>,
Christophe Ricard <christophe.ricard@gmail.com>,
tpmdd-devel@lists.sourceforge.net,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
Subject: Re: [tpmdd-devel] [PATCH] tpm: fix cacheline alignment for DMA-able buffers
Date: Tue, 9 Aug 2016 16:08:38 -0600 [thread overview]
Message-ID: <20160809220837.GA5535@obsidianresearch.com> (raw)
In-Reply-To: <CAE_wzQ95LAm7JkfB=V2VZVc4Vha4GcRyOBH_J8ZEh1gG+ZjEAA@mail.gmail.com>
On Tue, Aug 09, 2016 at 08:18:00AM -0700, Dmitry Torokhov wrote:
> Well, the main reason was simplicity and invasiveness of the
> change.
Well, it isn't simple, because the proposed patches have had subtle
problems with DMA. Simple is to use a guaranteed dma-able allocation
for DMA memory and stop trying to over optimize.
Jason
next prev parent reply other threads:[~2016-08-09 22:08 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-07-29 2:59 [PATCH] tpm: fix cacheline alignment for DMA-able buffers Andrey Pronin
2016-07-29 2:59 ` Andrey Pronin
2016-07-29 17:27 ` Jason Gunthorpe
[not found] ` <20160729172702.GB7020-ePGOBjL8dl3ta4EC/59zMFaTQe2KTcn/@public.gmane.org>
2016-07-29 17:30 ` Dmitry Torokhov
2016-08-09 9:46 ` Jarkko Sakkinen
2016-08-09 15:01 ` [tpmdd-devel] " Jarkko Sakkinen
[not found] ` <20160809150114.GA9672-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
2016-08-09 15:18 ` Dmitry Torokhov
2016-08-09 22:08 ` Jason Gunthorpe [this message]
[not found] ` <CAE_wzQ95LAm7JkfB=V2VZVc4Vha4GcRyOBH_J8ZEh1gG+ZjEAA-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2016-08-10 10:36 ` Jarkko Sakkinen
2016-08-10 10:36 ` [tpmdd-devel] " Jarkko Sakkinen
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