From: David Marchand <david.marchand@redhat.com>
To: "Wangyu (Eric)" <seven.wangyu@huawei.com>,
"Burakov, Anatoly" <anatoly.burakov@intel.com>
Cc: dengxiaofeng <dengxiaofeng@huawei.com>,
"dev@dpdk.org" <dev@dpdk.org>,
"ferruh.yigit@intel.com" <ferruh.yigit@intel.com>,
Linuxarm <linuxarm@huawei.com>, "humin (Q)" <humin29@huawei.com>,
"Liyuan (Larry)" <Larry.T@huawei.com>
Subject: Re: [dpdk-dev] [PATCH v2] bus/pci: resolve multiple NICs address conflicts
Date: Wed, 6 Nov 2019 08:37:30 +0100 [thread overview]
Message-ID: <CAJFAV8ybDuutVoeFj-pWp6SbsGMxXYQt3aT+85ezx+bObXA2Tg@mail.gmail.com> (raw)
In-Reply-To: <78A93308629D474AA53B84C5879E84D24B103B0C@DGGEMM533-MBX.china.huawei.com>
On Wed, Nov 6, 2019 at 7:16 AM Wangyu (Eric) <seven.wangyu@huawei.com> wrote:
>
>
> In 64K pagesize system, DPDK will read the size NIC need in uio/uio1/maps/map1/size, when the size small than pagesize(e.g.,82599 is 16K), dev->mem_resource[i].len will be 16K, but the mmap function applies for at least 1 page size, which is 64K.
> Then second NIC mmap, start address is first NIC address + 16K, which already used by first NIC.
Do you see this issue with vfio?
> So if change the size to first NIC address + 64K, problem solved.
You are hacking a description of the device resources to workaround a problem.
This patch is a no go for me.
Maybe there is something to do with the hint passed to mmap in uio case.
Adding Anatoly to the loop.
--
David Marchand
next prev parent reply other threads:[~2019-11-06 7:37 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-11-05 7:26 Wangyu (Turing Solution Development Dep)
2019-11-05 14:33 ` David Marchand
[not found] ` <D3165BB52137B64493C4E18DC69F10D62C8E7CDC@DGGEMM501-MBX.china.huawei.com>
2019-11-06 6:15 ` [dpdk-dev] 答复: " Wangyu (Eric)
2019-11-06 7:37 ` David Marchand [this message]
2019-11-06 10:35 ` [dpdk-dev] " Burakov, Anatoly
[not found] ` <D3165BB52137B64493C4E18DC69F10D62C8E903A@DGGEMM501-MBX.china.huawei.com>
2019-11-07 3:17 ` [dpdk-dev] 答复: " Wangyu (Eric)
2019-11-06 11:14 ` [dpdk-dev] " Burakov, Anatoly
[not found] ` <D3165BB52137B64493C4E18DC69F10D62C8E9085@DGGEMM501-MBX.china.huawei.com>
2019-11-07 5:44 ` [dpdk-dev] 答复: " Wangyu (Eric)
2019-11-07 12:24 ` Burakov, Anatoly
[not found] ` <D3165BB52137B64493C4E18DC69F10D62C8F159A@dggemm521-mbx.china.huawei.com>
2019-11-11 9:37 ` [dpdk-dev] 答复: " Wangyu (Eric)
2019-11-11 13:07 ` Burakov, Anatoly
2019-11-12 6:37 ` Gavin Hu (Arm Technology China)
2019-11-06 10:29 ` [dpdk-dev] " Burakov, Anatoly
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