12.08.2016 21:16, Mark H Weaver пишет: > On my Lemote YeeLoong 8101B (Loongson 2F), loading GRUB 2.02-beta3 from > PMON hangs early before displaying any messages. Usually the screen is > black, but occasionally there are some non-black pixels sprayed on the > screen. > > Git bisect and followup investigation shows that the following two > commits, which insert calls to 'grub_arch_sync_dma_caches', cause the > problem: > > * ca028db..: Vladimir Serbinenko 2016-02-23 usbtrans: Fix memory coherence > and use-after-free. > * 0f076d7..: Vladimir Serbinenko 2016-02-23 ehci: Fix memory coherence > > Either one of these commits is sufficient to cause the problem. > Reverting both of them fixes it. > > To be more concrete: here are the relevant commits that I tested, with > the results in the left column. The top two revert commits are local to > me, of course: > > [WORKS] * (mhw)7225f8a..: Mark H Weaver 2016-08-12 Revert "usbtrans: Fix > memory coherence and use-after-free." > [HANGS] * b32f5a8..: Mark H Weaver 2016-08-12 Revert "ehci: Fix memory > coherence" > * (origin/master)c831d20..: Andrei Borzenkov 2016-07-27 at_keyboard: > fix numpad "0" and "." mapping > [...] > [HANGS] * (tag: grub-2.02-beta3, tag: 2.02-beta3)8207874..: Vladimir > Serbinenko 2016-02-28 Release 2.02~beta3 > * 102e435..: Vladimir Serbinenko 2016-02-28 > grub_arch_sync_dma_caches: Accept volatile address > * 51f375d..: Leif Lindholm 2016-02-27 efidisk: Respect > block_io_protocol buffer alignment > [HANGS] * ca028db..: Vladimir Serbinenko 2016-02-23 usbtrans: Fix memory > coherence and use-after-free. > [HANGS] * 0f076d7..: Vladimir Serbinenko 2016-02-23 ehci: Fix memory coherence > [WORKS] * 86ef66d..: Vladimir Serbinenko 2016-02-19 arm-uboot: Make > self-relocatable to allow loading at any address > > For each commit tested, I built it natively within an isolated container > using GNU Guix from a pristine git checkout, bootstrapped using > automake-1.15 and autoconf-2.69, and built using gcc-4.9.3, > binutils-2.25.1, and the following configure flags: > > > CONFIG_SHELL=/gnu/store/n847hk4c1hiiyhk3z7k6kmm8dp96m7f4-bash-4.3.42/bin/bash > SHELL=/gnu/store/n847hk4c1hiiyhk3z7k6kmm8dp96m7f4-bash-4.3.42/bin/bash > --prefix=/gnu/store/4rrig6mzndi49yjg586a7nwkqkr7mc0z-grub-2.02beta2-g7225f8a > --enable-fast-install > --build=mips64el-unknown-linux-gnu > --disable-werror > > (although the hash components of the --prefix varied) > > I've attached the complete build log for commit 7225f8a below. If it > would be helpful, I can provide the build outputs for any of these > commits, or describe how to reproduce the exact same builds on your MIPS > or Loongson-based machine using GNU Guix. >
Without knowing anything about MIPS - can this somehow be related? https://lists.gnu.org/archive/html/grub-devel/2015-06/msg00060.html > Thanks, > Mark > > > > _______________________________________________ > Bug-grub mailing list > Bug-grub@gnu.org > https://lists.gnu.org/mailman/listinfo/bug-grub > _______________________________________________ Bug-grub mailing list Bug-grub@gnu.org https://lists.gnu.org/mailman/listinfo/bug-grub