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Fri, 28 Mar 2025 08:50:14 GMT (envelope-from bugzilla-noreply@freebsd.org) X-Authentication-Warning: kenobi.freebsd.org: www set sender to bugzilla-noreply@freebsd.org using -f From: bugzilla-noreply@freebsd.org To: virtualization@FreeBSD.org Subject: [Bug 285681] [Hyper-V] i386 panic during storvsc_xferbuf_prepare() Date: Fri, 28 Mar 2025 08:50:14 +0000 X-Bugzilla-Reason: AssignedTo X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: Base System X-Bugzilla-Component: kern X-Bugzilla-Version: 15.0-CURRENT X-Bugzilla-Keywords: crash X-Bugzilla-Severity: Affects Some People X-Bugzilla-Who: markj@FreeBSD.org X-Bugzilla-Status: Open X-Bugzilla-Resolution: X-Bugzilla-Priority: --- X-Bugzilla-Assigned-To: virtualization@FreeBSD.org X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: bug_status cc Message-ID: In-Reply-To: References: Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="UTF-8" X-Bugzilla-URL: https://bugs.freebsd.org/bugzilla/ Auto-Submitted: auto-generated List-Id: Discussion List-Archive: https://lists.freebsd.org/archives/freebsd-virtualization List-Help: List-Post: List-Subscribe: List-Unsubscribe: X-BeenThere: freebsd-virtualization@freebsd.org Sender: owner-freebsd-virtualization@FreeBSD.org MIME-Version: 1.0 https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D285681 Mark Johnston changed: What |Removed |Added ---------------------------------------------------------------------------- Status|New |Open CC| |whu@FreeBSD.org --- Comment #5 from Mark Johnston --- (In reply to Dimitry Andric from comment #4) I'm wondering if the panic is reproducible with less than 4GB of RAM. In particular, I guess we're bouncing the I/O pages, and since the driver does= n't keep track of the 1st page offset, this flag fixes the problem. Could you please try, say, 3GB of RAM, and without the patch? In particular I note t= hat the page address passed by storvsc_xferbuf_prepare() is a uint64_t, so mayb= e we can avoid bouncing entirely on i386. If that works, it still doesn't explain why we need to disable the assertio= n on arm64. Can we try the same test from comment 2 on arm64? --=20 You are receiving this mail because: You are the assignee for the bug.=