From: Nicolas Saenz Julienne <nsaenzjulienne@suse.de>
To: Amit Pundir <amit.pundir@linaro.org>
Cc: lkml <linux-kernel@vger.kernel.org>,
jeremy.linton@arm.com, Sumit Semwal <sumit.semwal@linaro.org>,
iommu@lists.linux-foundation.org,
John Stultz <john.stultz@linaro.org>,
linux-rpi-kernel@lists.infradead.org,
David Rientjes <rientjes@google.com>,
Robin Murphy <robin.murphy@arm.com>,
Christoph Hellwig <hch@lst.de>
Subject: Re: [PATCH] dma-pool: Do not allocate pool memory from CMA
Date: Fri, 24 Jul 2020 11:36:55 +0200 [thread overview]
Message-ID: <0dc1e922bf87fa73790e7471b3974528dd261486.camel@suse.de> (raw)
In-Reply-To: <CAMi1Hd0Xz6kOJFpA5PEpi6RDDGOcz0RmQ7tTOkuXq4QneOO_vQ@mail.gmail.com>
Hi Amit,
On Thu, 2020-07-23 at 10:44 +0530, Amit Pundir wrote:
> Hi Nicolas,
>
> Sorry I got stuck on other things yesterday.
No worries :)
> On Tue, 21 Jul 2020 at 21:57, Nicolas Saenz Julienne
[...]
> >
> > Let's get a bigger hammer, I'm just looking for clues here. Can you
> > apply this and provide the dmesg output.
> >
> > diff --git a/kernel/dma/pool.c b/kernel/dma/pool.c
> > index 6bc74a2d5127..2160676bf488 100644
> > --- a/kernel/dma/pool.c
> > +++ b/kernel/dma/pool.c
> > @@ -268,6 +268,8 @@ void *dma_alloc_from_pool(struct device *dev, size_t size,
> > schedule_work(&atomic_pool_work);
> > }
> >
> > + dev_info(dev, "%s: size %lx, phys addr %llx, flags 0x%x\n", __func__, size, phys, flags);
> > +
> > return ptr;
> > }
>
> I never made it to dma_alloc_from_pool() call from
> dma_direct_alloc_pages(), dma_should_alloc_from_pool() returns False
> from gfpflags_allow_blocking() block.
I'm a little sceptical about this. The only way you can get memory from these
pools is through dma_alloc_from_pool(), and given how changes in the pool
initialization affected the phone, it's pretty clear some amount of pool
allocation is happening.
Regards,
Nicolas
_______________________________________________
iommu mailing list
iommu@lists.linux-foundation.org
https://lists.linuxfoundation.org/mailman/listinfo/iommu
next prev parent reply other threads:[~2020-07-24 9:37 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-07-08 16:49 [PATCH] dma-pool: Do not allocate pool memory from CMA Nicolas Saenz Julienne
2020-07-08 16:58 ` Christoph Hellwig
2020-07-08 23:14 ` Jeremy Linton
2020-07-09 21:47 ` David Rientjes via iommu
2020-07-21 7:21 ` Amit Pundir
2020-07-21 8:39 ` Nicolas Saenz Julienne
2020-07-21 8:54 ` Amit Pundir
2020-07-21 11:15 ` Nicolas Saenz Julienne
2020-07-21 11:28 ` Christoph Hellwig
2020-07-21 11:37 ` Nicolas Saenz Julienne
2020-07-21 12:16 ` Amit Pundir
2020-07-21 12:15 ` Amit Pundir
2020-07-21 12:45 ` Nicolas Saenz Julienne
2020-07-21 15:22 ` Amit Pundir
2020-07-21 16:27 ` Nicolas Saenz Julienne
2020-07-23 5:14 ` Amit Pundir
2020-07-24 9:36 ` Nicolas Saenz Julienne [this message]
2020-07-24 11:06 ` Amit Pundir
2020-07-24 13:41 ` Christoph Hellwig
2020-07-24 16:19 ` Amit Pundir
2020-07-24 16:27 ` Christoph Hellwig
2020-07-27 17:56 ` Nicolas Saenz Julienne
2020-07-28 9:13 ` Christoph Hellwig
2020-07-28 9:30 ` Nicolas Saenz Julienne
2020-07-28 10:09 ` Christoph Hellwig
2020-07-31 1:10 ` Nathan Chancellor
2020-07-31 7:19 ` Amit Pundir
2020-07-31 10:09 ` Nicolas Saenz Julienne
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=0dc1e922bf87fa73790e7471b3974528dd261486.camel@suse.de \
--to=nsaenzjulienne@suse.de \
--cc=amit.pundir@linaro.org \
--cc=hch@lst.de \
--cc=iommu@lists.linux-foundation.org \
--cc=jeremy.linton@arm.com \
--cc=john.stultz@linaro.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-rpi-kernel@lists.infradead.org \
--cc=rientjes@google.com \
--cc=robin.murphy@arm.com \
--cc=sumit.semwal@linaro.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).