From: Thierry Reding <thierry.reding-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
To: Dmitry Osipenko <digetx-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
Cc: Joerg Roedel <joro-zLv9SwRftAIdnm+yROfE0A@public.gmane.org>,
Jonathan Hunter
<jonathanh-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org>,
linux-tegra-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
iommu-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org
Subject: Re: [PATCH v1 1/4] iommu/tegra: gart: Don't unnecessarily allocate registers context
Date: Tue, 26 Sep 2017 13:19:50 +0200 [thread overview]
Message-ID: <20170926111950.GD23108@ulmo> (raw)
In-Reply-To: <df570fb6649da6bc3b5f2a68afcb5471e6148269.1499270277.git.digetx-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
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On Wed, Jul 05, 2017 at 07:29:45PM +0300, Dmitry Osipenko wrote:
> GART looses it's state only in case of a deepest suspend level. Let's not
> waste memory if machine doesn't support that suspend level.
>
> Signed-off-by: Dmitry Osipenko <digetx-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
> ---
> drivers/iommu/tegra-gart.c | 36 +++++++++++++++++++++++++-----------
> 1 file changed, 25 insertions(+), 11 deletions(-)
I'm not sure about this. The savedata region uses 32 KiB of memory,
which is really not a whole lot.
In addition, the suspend mode can be set in different places during the
boot process, some of which fairly late. I'm concerned that this boot
order dependency is going to come back to bite us eventually.
Thierry
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next prev parent reply other threads:[~2017-09-26 11:19 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-07-05 16:29 [PATCH v1 0/4] iommu/tegra: gart: Couple corrections Dmitry Osipenko
[not found] ` <cover.1499270277.git.digetx-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2017-07-05 16:29 ` [PATCH v1 1/4] iommu/tegra: gart: Don't unnecessarily allocate registers context Dmitry Osipenko
[not found] ` <df570fb6649da6bc3b5f2a68afcb5471e6148269.1499270277.git.digetx-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2017-09-26 11:19 ` Thierry Reding [this message]
2017-09-26 14:15 ` Dmitry Osipenko
2017-07-05 16:29 ` [PATCH v1 2/4] iommu/tegra: gart: Check whether page is already mapped Dmitry Osipenko
[not found] ` <a19ba1ca835aa2526d2c0492e6b0d0b35889596a.1499270277.git.digetx-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2017-09-26 11:06 ` Thierry Reding
2017-09-26 13:49 ` Dmitry Osipenko
[not found] ` <e59eb818-4edf-f3a2-947a-bc21507b0b85-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2017-09-26 16:07 ` Thierry Reding
2017-09-26 16:57 ` Dmitry Osipenko
2017-07-05 16:29 ` [PATCH v1 3/4] iommu/tegra: gart: Move PFN validation out of spinlock Dmitry Osipenko
[not found] ` <301b5e91fae43beae4542e8c4a7d5ca6a6918ba0.1499270277.git.digetx-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2017-09-26 11:07 ` Thierry Reding
2017-07-05 16:29 ` [PATCH v1 4/4] iommu/tegra: gart: Correct number of unmapped bytes Dmitry Osipenko
[not found] ` <f30500403195b029ee236fff3b3c6f0b4dc60cbb.1499270277.git.digetx-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2017-09-26 11:09 ` Thierry Reding
2017-07-25 14:43 ` [PATCH v1 0/4] iommu/tegra: gart: Couple corrections Joerg Roedel
[not found] ` <20170725144335.GC30429-zLv9SwRftAIdnm+yROfE0A@public.gmane.org>
2017-07-29 11:04 ` Dmitry Osipenko
[not found] ` <430af3ab-29cd-bbe8-087d-82d8113d2a89-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2017-07-29 11:09 ` Dmitry Osipenko
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