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From: Ming Lei <ming.lei@redhat.com>
To: John Garry <john.garry@huawei.com>
Cc: Robin Murphy <robin.murphy@arm.com>,
iommu@lists.linux-foundation.org, Will Deacon <will@kernel.org>,
linux-arm-kernel@lists.infradead.org,
linux-nvme@lists.infradead.org, linux-kernel@vger.kernel.org
Subject: Re: [bug report] iommu_dma_unmap_sg() is very slow then running IO from remote numa node
Date: Wed, 21 Jul 2021 09:40:48 +0800 [thread overview]
Message-ID: <YPd7IGFZrsTRfUxE@T590> (raw)
In-Reply-To: <ad5bc549-d83f-bee0-9a9f-03a5afd7f3d9@huawei.com>
On Mon, Jul 19, 2021 at 05:14:28PM +0100, John Garry wrote:
> On 09/07/2021 15:24, Ming Lei wrote:
> > > associated compromises.
> > Follows the log of 'perf report'
> >
> > 1) good(run fio from cpus in the nvme's numa node)
>
> Hi Ming,
>
> If you're still interested in this issue, as an experiment only you can try
> my rebased patches here:
>
> https://github.com/hisilicon/kernel-dev/commits/private-topic-smmu-5.14-cmdq-4
>
> I think that you should see a significant performance boost.
There is build issue, please check your tree:
MODPOST vmlinux.symvers
MODINFO modules.builtin.modinfo
GEN modules.builtin
LD .tmp_vmlinux.btf
ld: Unexpected GOT/PLT entries detected!
ld: Unexpected run-time procedure linkages detected!
ld: drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.o: in function `smmu_test_store':
/root/git/linux/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c:3892: undefined reference to `smmu_test_core'
BTF .btf.vmlinux.bin.o
pahole: .tmp_vmlinux.btf: No such file or directory
LD .tmp_vmlinux.kallsyms1
.btf.vmlinux.bin.o: file not recognized: file format not recognized
make: *** [Makefile:1177: vmlinux] Error 1
Thanks,
Ming
next prev parent reply other threads:[~2021-07-21 1:41 UTC|newest]
Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-07-09 8:38 [bug report] iommu_dma_unmap_sg() is very slow then running IO from remote numa node Ming Lei
2021-07-09 10:16 ` Russell King (Oracle)
2021-07-09 14:21 ` Ming Lei
2021-07-09 10:26 ` Robin Murphy
2021-07-09 11:04 ` John Garry
2021-07-09 12:34 ` Robin Murphy
2021-07-09 14:24 ` Ming Lei
2021-07-19 16:14 ` John Garry
2021-07-21 1:40 ` Ming Lei [this message]
2021-07-21 9:23 ` John Garry
2021-07-21 9:59 ` Ming Lei
2021-07-21 11:07 ` John Garry
2021-07-21 11:58 ` Ming Lei
2021-07-22 7:58 ` Ming Lei
2021-07-22 10:05 ` John Garry
2021-07-22 10:19 ` Ming Lei
2021-07-22 11:12 ` John Garry
2021-07-22 12:53 ` Marc Zyngier
2021-07-22 13:54 ` John Garry
2021-07-22 15:54 ` Ming Lei
2021-07-22 17:40 ` Robin Murphy
2021-07-23 10:21 ` Ming Lei
2021-07-26 7:51 ` John Garry
2021-07-28 1:32 ` Ming Lei
2021-07-28 10:38 ` John Garry
2021-07-28 15:17 ` Ming Lei
2021-07-28 15:39 ` Robin Murphy
2021-08-10 9:36 ` John Garry
2021-08-10 10:35 ` Ming Lei
2021-07-27 17:08 ` Robin Murphy
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