From: Baolu Lu <baolu.lu@linux.intel.com>
To: "Tian, Kevin" <kevin.tian@intel.com>,
Dimitri Sivanich <sivanich@hpe.com>,
Thomas Gleixner <tglx@linutronix.de>,
Joerg Roedel <joro@8bytes.org>,
Suravee Suthikulpanit <suravee.suthikulpanit@amd.com>,
Will Deacon <will@kernel.org>,
Robin Murphy <robin.murphy@arm.com>,
David Woodhouse <dwmw2@infradead.org>,
Mark Rutland <mark.rutland@arm.com>,
Peter Zijlstra <peterz@infradead.org>,
Arnd Bergmann <arnd@arndb.de>, YueHaibing <yuehaibing@huawei.com>,
"iommu@lists.linux.dev" <iommu@lists.linux.dev>
Cc: baolu.lu@linux.intel.com,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
Steve Wahl <steve.wahl@hpe.com>,
"Anderson, Russ" <russ.anderson@hpe.com>,
Jacob Pan <jacob.jun.pan@linux.intel.com>
Subject: Re: [PATCH v2] iommu/vt-d: Allocate DMAR fault interrupts locally
Date: Mon, 8 Apr 2024 15:21:56 +0800 [thread overview]
Message-ID: <ec0ff625-855c-4dba-b19f-db050671fbfb@linux.intel.com> (raw)
In-Reply-To: <BN9PR11MB52765241E3261B58BE93E8A88C002@BN9PR11MB5276.namprd11.prod.outlook.com>
On 2024/4/8 14:54, Tian, Kevin wrote:
>> From: Dimitri Sivanich <sivanich@hpe.com>
>> Sent: Friday, March 22, 2024 4:51 AM
>>
>> The Intel IOMMU code currently tries to allocate all DMAR fault interrupt
>> vectors on the boot cpu. On large systems with high DMAR counts this
>> results in vector exhaustion, and most of the vectors are not initially
>> allocated socket local.
>>
>> Instead, have a cpu on each node do the vector allocation for the DMARs on
>> that node. The boot cpu still does the allocation for its node during its
>> boot sequence.
>>
>> Signed-off-by: Dimitri Sivanich <sivanich@hpe.com>
>
> Reviewed-by: Kevin Tian <kevin.tian@intel.com>
>
Kevin,
Jacob has another proposal which shares the irq among all IOMMUs.
https://lore.kernel.org/linux-iommu/20240403234548.989061-1-jacob.jun.pan@linux.intel.com/
How do you like this?
Best regards,
baolu
next prev parent reply other threads:[~2024-04-08 7:22 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-03-21 20:50 [PATCH v2] iommu/vt-d: Allocate DMAR fault interrupts locally Dimitri Sivanich
2024-03-22 4:41 ` Zhang, Tina
2024-03-22 15:03 ` Dimitri Sivanich
2024-03-22 23:01 ` Jacob Pan
2024-04-08 6:54 ` Tian, Kevin
2024-04-08 7:21 ` Baolu Lu [this message]
2024-04-08 9:00 ` Tian, Kevin
2024-04-08 16:39 ` Jacob Pan
2024-04-24 3:43 ` Baolu Lu
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=ec0ff625-855c-4dba-b19f-db050671fbfb@linux.intel.com \
--to=baolu.lu@linux.intel.com \
--cc=arnd@arndb.de \
--cc=dwmw2@infradead.org \
--cc=iommu@lists.linux.dev \
--cc=jacob.jun.pan@linux.intel.com \
--cc=joro@8bytes.org \
--cc=kevin.tian@intel.com \
--cc=linux-kernel@vger.kernel.org \
--cc=mark.rutland@arm.com \
--cc=peterz@infradead.org \
--cc=robin.murphy@arm.com \
--cc=russ.anderson@hpe.com \
--cc=sivanich@hpe.com \
--cc=steve.wahl@hpe.com \
--cc=suravee.suthikulpanit@amd.com \
--cc=tglx@linutronix.de \
--cc=will@kernel.org \
--cc=yuehaibing@huawei.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 an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.