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Re: kern/56925: Amd64 server randomly panics

The following reply was made to PR kern/56925; it has been noted by GNATS.

From: (Michael van Elst)
Subject: Re: kern/56925: Amd64 server randomly panics
Date: Fri, 15 Jul 2022 13:18:16 -0000 (UTC) (Taylor R Campbell) writes:
 > I see two problems in the ccb_timeout and wake_ccb logic:
 > 1. ccb_timeout is called from softint context, and calls wake_ccb,
 ccb_timeout_co is the callout function (i.e. softint context) that queues
 the ccb via ccb_tchain and signals the cleanup thread. The operation is
 protected by a mutex at IPL_BIO.
 ccb_timeout is then called later from the cleanup thread.

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