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Date:      Tue, 02 Mar 2021 07:39:28 +0000
From:      bugzilla-noreply@freebsd.org
To:        net@FreeBSD.org
Subject:   [Bug 252165] mii bus media status race condition
Message-ID:  <bug-252165-7501-IxiG7Tt88a@https.bugs.freebsd.org/bugzilla/>
In-Reply-To: <bug-252165-7501@https.bugs.freebsd.org/bugzilla/>
References:  <bug-252165-7501@https.bugs.freebsd.org/bugzilla/>

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D252165

--- Comment #14 from Ali Abdallah <ali.abdallah@suse.com> ---
Even without UE_LOCK and UE_UNLOCK of comment 13 the issue is still
occurring...=20

The following dtrace is observed when the link state fictitiously changes=20

2  64192               ue_tick_task:entry      242528044179
2  64175                   ure_tick:entry      242528050925
1  64152            ure_ifmedia_sts:entry      242529137165
2  64176                  ure_tick:return      242529369904
1  64152            ure_ifmedia_sts:entry      242529474008
2  64153           ure_ifmedia_sts:return      242530486029

For whatever reason... Normally the sequence should be=20

2  64152            ure_ifmedia_sts:entry      243552084077
2  64153           ure_ifmedia_sts:return      243553071554
0  64192               ue_tick_task:entry      243553441743
0  64175                   ure_tick:entry      243553444178
2  64176                  ure_tick:return      243554572011
3  64152            ure_ifmedia_sts:entry      243663084286
3  64153           ure_ifmedia_sts:return      243664074467

--=20
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