From: David S. Miller <davem@davemloft.net>
Date: Wed, 17 Nov 2021 14:56:16 +0000 (+0000)
Subject: Merge branch 'dev_watchdog-less-intrusive'
X-Git-Tag: v6.1-rc5~2306^2~427
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=17a7555bf21ce755219bf575b8a83adbf19580bd;p=platform%2Fkernel%2Flinux-starfive.git

Merge branch 'dev_watchdog-less-intrusive'

Eric Dumazet says:

====================
net: make dev_watchdog() less intrusive

dev_watchdog() is used on many NIC to periodically monitor TX queues
to detect hangs.

Problem is : It stops all queues, then check them, then 'unfreeze' them.

Not only this stops feeding the NIC, it also migrates all qdiscs
to be serviced on the cpu calling netif_tx_unlock(), causing
a potential latency artifact.

With many TX queues, this is becoming more visible.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
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17a7555bf21ce755219bf575b8a83adbf19580bd