Date: Mon, 01 Dec 2014 19:03:34 +0000 From: bugzilla-noreply@freebsd.org To: freebsd-xen@FreeBSD.org Subject: [Bug 195537] [xen] vt console somehow causes failures to boot and disk errors Message-ID: <bug-195537-23905-mMg9rMBzsP@https.bugs.freebsd.org/bugzilla/> In-Reply-To: <bug-195537-23905@https.bugs.freebsd.org/bugzilla/> References: <bug-195537-23905@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D195537 Roger Pau Monn=C3=83=C2=A9 <royger@freebsd.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Assignee|freebsd-xen@FreeBSD.org |royger@freebsd.org --- Comment #1 from Roger Pau Monn=C3=83=C2=A9 <royger@freebsd.org> --- Created attachment 150078 --> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=3D150078&action= =3Dedit Make vt_vga reserve the memory it uses Yes, I'm aware of the issue. It comes from the fact that FreeBSD/Xen uses t= he holes in the memory map to map the grant table, foreign memory from other domains, &c. The problem is that the vt_vga driver doesn't reserve the memory region it uses, so Xen will happily use it for it's ends, this as you already realized ends up very badly. I'm attaching a crappy patch that solves this by making vt_vga register the memory it uses, but the patch is incomplete: * It unconditionally reserves the memory, even if vt_vga is not used. * I've not checked if other vt_* drivers have the same issue. --=20 You are receiving this mail because: You are the assignee for the bug.=
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