On Tue, 9 Jul 2019, Linus Torvalds wrote: > On Tue, Jul 9, 2019 at 2:45 PM Linus Torvalds > <torva...@linux-foundation.org> wrote: > > > > and I suspect it's the sensitive bit pinning. But I'll delve all the way. > > Confirmed. Bisection says > > 873d50d58f67ef15d2777b5e7f7a5268bb1fbae2 is the first bad commit > commit 873d50d58f67ef15d2777b5e7f7a5268bb1fbae2 > Author: Kees Cook <keesc...@chromium.org> > Date: Mon Jun 17 21:55:02 2019 -0700 > > x86/asm: Pin sensitive CR4 bits > > this is on a bog-standard Intel setup with F30, both desktop and > laptop (i9-9900k and i7-8565u respectively). > > I haven't confirmed yet whether reverting just that one commit is > required, or if I need to revert the cr0 one too. > > I also don't have any logs, because the boot never gets far enough. I > assume that there was a problem bringing up a non-boot CPU, and the > eventual hang ends up being due to that.
Hrm. I just build the tip of your tree and bootet it. It hangs at: [ 4.788678] ACPI: 4 ACPI AML tables successfully acquired and loaded [ 4.793860] ACPI: [Firmware Bug]: BIOS _OSI(Linux) query ignored [ 4.821476] ACPI: Dynamic OEM Table Load: That's way after the secondary CPUs have been brought up. tip/master boots without problems with the same config. Let me try x86/asm alone and also a revert of the CR4/CR0 stuff. And while writing this the softlockup detector muttered: [ 245.849408] INFO: task swapper/0:1 blocked for more than 120 seconds. [ 245.853406] Not tainted 5.2.0+ #69 [ 245.857318] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 245.865405] swapper/0 D 0 1 0 0x80004000 [ 245.869405] Call Trace: [ 245.871859] ? __schedule+0x2bb/0x690 [ 245.877410] ? acpi_ps_complete_op+0x259/0x279 [ 245.881406] schedule+0x29/0x90 [ 245.884540] schedule_timeout+0x20d/0x310 [ 245.889409] ? acpi_os_release_object+0xa/0x10 [ 245.893406] ? acpi_ps_delete_parse_tree+0x2d/0x59 [ 245.897405] __down_timeout+0x9b/0x100 [ 245.901150] down_timeout+0x43/0x50 [ 245.905407] acpi_os_wait_semaphore+0x48/0x60 [ 245.909408] acpi_ut_acquire_mutex+0x45/0x89 [ 245.913406] ? acpi_ns_init_one_package+0x44/0x44 [ 245.917406] acpi_walk_namespace+0x62/0xc2 [ 245.921406] acpi_ns_initialize_objects+0x40/0x7b [ 245.925407] acpi_ex_load_table_op+0x157/0x1b9 [ 245.933406] acpi_ex_opcode_6A_0T_1R+0x158/0x1c2 [ 245.937406] acpi_ds_exec_end_op+0xca/0x401 [ 245.941406] acpi_ps_parse_loop+0x492/0x5c6 [ 245.945406] acpi_ps_parse_aml+0x91/0x2b8 [ 245.949405] acpi_ps_execute_method+0x15d/0x191 [ 245.953406] acpi_ns_evaluate+0x1bf/0x24c [ 245.957406] acpi_evaluate_object+0x137/0x240 [ 245.961408] ? kmem_cache_alloc_trace+0x15b/0x1c0 [ 245.965406] acpi_processor_set_pdc+0x135/0x180 [ 245.969408] early_init_pdc+0xb3/0xd0 [ 245.973064] acpi_ns_walk_namespace+0xda/0x1aa [ 245.977407] ? set_no_mwait+0x23/0x23 [ 245.981062] ? set_no_mwait+0x23/0x23 [ 245.985406] acpi_walk_namespace+0x9a/0xc2 [ 245.989406] ? acpi_sleep_proc_init+0x24/0x24 [ 245.993407] ? do_early_param+0x8e/0x8e [ 245.997235] acpi_early_processor_set_pdc+0x31/0x49 [ 246.001406] acpi_init+0x17c/0x321 Thanks, tglx