From: Florian Fainelli <f.fainelli@gmail.com>
To: linux-kernel@vger.kernel.org
Cc: Andrew Lunn <andrew@lunn.ch>,
Florian Fainelli <f.fainelli@gmail.com>,
Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>,
"open list:NETWORKING \[GENERAL\]" <netdev@vger.kernel.org>,
Vivien Didelot <vivien.didelot@gmail.com>,
"open list:DMA MAPPING HELPERS"
<iommu@lists.linux-foundation.org>,
"David S. Miller" <davem@davemloft.net>,
bcm-kernel-feedback-list@broadcom.com,
Robin Murphy <robin.murphy@arm.com>,
Christoph Hellwig <hch@lst.de>
Subject: [PATCH 0/2] swiotlb: Cleanup and consistency fix
Date: Tue, 11 Jun 2019 10:58:23 -0700 [thread overview]
Message-ID: <20190611175825.572-1-f.fainelli@gmail.com> (raw)
Hi Christoph,
Still with my contrived memory layout where there is no physical memory
the kernel can use below 4GB, it was possible to fail swiotlb_init(),
but still not hit swiotlb_map_single() since all peripherals have a
DMA_BIT_MASK() that is within the remaining addressable physical memory.
The second path could be backported to stable, but for the same reasons
as the one we had just discussed before, this requires a very contrived
test case that is not necessarily realistic or would warrant a stable
backport IMHO.
Thanks!
Florian Fainelli (2):
swiotlb: Group identical cleanup in swiotlb_cleanup()
swiotlb: Return consistent SWIOTLB segments/nr_tbl
kernel/dma/swiotlb.c | 26 ++++++++++++++------------
1 file changed, 14 insertions(+), 12 deletions(-)
--
2.17.1
_______________________________________________
iommu mailing list
iommu@lists.linux-foundation.org
https://lists.linuxfoundation.org/mailman/listinfo/iommu
next reply other threads:[~2019-06-11 17:58 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-06-11 17:58 Florian Fainelli [this message]
2019-06-11 17:58 ` [PATCH 1/2] swiotlb: Group identical cleanup in swiotlb_cleanup() Florian Fainelli
2019-06-14 9:46 ` Christoph Hellwig
2019-06-11 17:58 ` [PATCH 2/2] swiotlb: Return consistent SWIOTLB segments/nr_tbl Florian Fainelli
2019-06-14 9:47 ` Christoph Hellwig
2019-06-11 18:48 ` [PATCH 0/2] swiotlb: Cleanup and consistency fix Konrad Rzeszutek Wilk
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=20190611175825.572-1-f.fainelli@gmail.com \
--to=f.fainelli@gmail.com \
--cc=andrew@lunn.ch \
--cc=bcm-kernel-feedback-list@broadcom.com \
--cc=davem@davemloft.net \
--cc=hch@lst.de \
--cc=iommu@lists.linux-foundation.org \
--cc=konrad.wilk@oracle.com \
--cc=linux-kernel@vger.kernel.org \
--cc=netdev@vger.kernel.org \
--cc=robin.murphy@arm.com \
--cc=vivien.didelot@gmail.com \
/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).