This bug still crashes my box on rc3 -- Steve
On October 6, 2017 10:21:26 PM EDT, Nadav Amit <nadav.a...@gmail.com> wrote: >Steven Rostedt <rost...@goodmis.org> wrote: > >> Starting with v4.14-rc1 my box crashes during a reboot. All I get is >> the following: >> >> [ 250.615793] sd 0:0:0:0: [sda] Synchronizing SCSI cache >> [ 250.635639] reboot: Restarting system >> [ 250.639671] reboot: machine restart >> [ 250.643842] general protection fault: 0000 [#1] PREEMPT SMP KASAN >> >> Then nothing. No reboot, it just hangs there. >> >> I bisected it down to this commit: >> >> 660da7c9228f ("x86/mm: Enable CR4.PCIDE on supported systems") >> >> If I comment out the setting of X86_CR4_PCIDE in that commit, it >boots >> fine. But... >> >> I noticed that commit c7ad5ad29 ("x86/mm/64: Initialize CR4.PCIDE >> early") moved the problem code from arch/x86/kernel/cpu/common.c to >> arch/x86/mm/init.c >> >> If I comment it out in v4.14-rc1, it crashes on boot up. >> >> It appears that my box doesn't like having X86_CR4_PCIDE set. it >causes >> reboot to fail. But it also appears that setting that is required for >> some other code to work. > >IIRC, there was a problem in rc1, which should be resolved in newer >rcs. >If you need to run rc1, you can try to use the kernel parameter >“nopcid". > >Nadav -- Sent from my Android device with K-9 Mail. Please excuse my brevity.