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Re: [tboot-devel] Crash/system reset with linux 4.4
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From: Jan S. <ja...@sc...> - 2016-08-03 15:57:53
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Just FYI - I'm using tboot with 4.4 kernels (Ubuntu 16.04) and I haven't had this issue Jan > On 03 Aug 2016, at 05:35, Sun, Ning <nin...@in...> wrote: > > There is an explanation in README of tboot source code about 'min_ram' parameter: https://sourceforge.net/p/tboot/code/ci/default/tree/. > To identify this issue as a generic or a specific one with Qubes OS, needs to run Qubes OS and tboot on several different platforms from different vendors if possible. > There are new releases of tboot available since tboot 1.8.2, to help verify if tboot has a bug relevant to this crash/reset. > > -ning > > -----Original Message----- > From: Chris Laprise [mailto:ta...@op...] > Sent: Tuesday, August 02, 2016 5:54 PM > To: tbo...@li... > Subject: [tboot-devel] Crash/system reset with linux 4.4 > > Hello, > > > On Qubes OS 3.2rc2, a tboot-based boot sequence will fail with a system reset unless the 'min_ram=0x2000000' parameter is specified in grub. See Qubes issue #2155: > > https://github.com/QubesOS/qubes-issues/issues/2155 > > Currently, Qubes uses tboot version 1.8.2 from the Fedora 23 repository. > The other relevant components are Linux kernel 4.4.14 and Xen 4.6.1. If Linux is downgraded to 4.2 then the system is able to boot without crashing. > > This parameter would normally be used to rectify a milder condition where the system boots with less memory available than it should. Using it to avoid a catastrophic crash does not seem right, so I'd like to ask what is the best course of action from the tboot devs: Is this a bug in tboot or Linux? Should Qubes devs consider using 'min_ram' for all tboot installations? Would it be worth the trouble to try upgrading tboot to the current version? And if so, are signatures available for the tboot code? > > Chris > > > ------------------------------------------------------------------------------ > _______________________________________________ > tboot-devel mailing list > tbo...@li... > https://lists.sourceforge.net/lists/listinfo/tboot-devel > > ------------------------------------------------------------------------------ > _______________________________________________ > tboot-devel mailing list > tbo...@li... > https://lists.sourceforge.net/lists/listinfo/tboot-devel |