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From: "Ciprian Pascu (Nokia)" <ciprian.pascu@nokia.com>
To: "users@dpdk.org" <users@dpdk.org>,
	"bruce.richardson@intel.com" <bruce.richardson@intel.com>
Subject: DPDK issue with reading the eth interface status?
Date: Wed, 7 Dec 2022 13:57:25 +0000	[thread overview]
Message-ID: <HE1PR07MB34652CB007866965A7CBD0C4E31A9@HE1PR07MB3465.eurprd07.prod.outlook.com> (raw)

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Hi,
I encountered an issue while using dpdk-20.05 in our VMware based VMs: at times, when sysstat data is collected, dpdk signals that some eth interface is down; this happens occasionally; after sysstat data has been collected, eth interface is signaled as up; I was wondering about these lines in '__vmxnet3_dev_link_update' function:

1251 >*******VMXNET3_WRITE_BAR1_REG(hw, VMXNET3_REG_CMD, VMXNET3_CMD_GET_LINK);
1252 >*******ret = VMXNET3_READ_BAR1_REG(hw, VMXNET3_REG_CMD);

Is this atomic? Could this lead to problems if some other module tries to read something else at about the same time and overwrites the command?


Thanks,
Ciprian.


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             reply	other threads:[~2022-12-12 11:28 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-12-07 13:57 Ciprian Pascu (Nokia) [this message]
2022-12-07 14:12 ` VS: " Ciprian Pascu (Nokia)
2022-12-12 16:26   ` Stephen Hemminger

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