On Wed, 17 Jul 2019 08:34:59 +0200 Juri Lelli <juri.le...@gmail.com> wrote:
> Hi Clark, > > On 16/07/19 17:55, Clark Williams wrote: > > Saw this after applying my thermal lock to raw patch and the change in i915 > > for lockdep. The > > splat occurred on boot when creating the kdump initramfs. System is an > > Intel NUC i7 with 32GB ram > > and 256GB SSD for rootfs. > > > > The booting kernel has rt_mutex debugging turned on as well as lockdep and > > lockup configs. > > > > Jul 16 14:41:48 theseus dracut[3082]: *** Creating initramfs image file > > '/boot/initramfs-5.2.0-rt1.fixes+kdump.img' done *** > > Jul 16 14:41:48 theseus kernel: ------------[ cut here ]------------ > > Jul 16 14:41:48 theseus kernel: DEBUG_LOCKS_WARN_ON(rt_mutex_owner(lock) != > > current) > > Jul 16 14:41:48 theseus kernel: WARNING: CPU: 1 PID: 8349 at > > kernel/locking/rtmutex-debug.c:145 debug_rt_mutex_unlock+0x47/0x50 > > Jul 16 14:41:48 theseus kernel: Modules linked in: rfcomm xt_CHECKSUM > > xt_MASQUERADE tun bridge stp llc fuse nf_conntrack_netbios_ns > > nf_conntrack_broadcast xt_CT ip6t_rpfilter ip6t_REJECT nf_reject_ipv6 > > ipt_REJECT nf_reject_ipv4 xt_conntrack ebtable_nat ip6table_nat > > ip6table_mangle ip6table_raw> > > Jul 16 14:41:48 theseus kernel: snd_rawmidi snd_hda_core media snd_hwdep > > snd_seq btusb wmi_bmof snd_seq_device iwlwifi btrtl intel_wmi_thunderbolt > > btbcm snd_pcm iTCO_wdt btintel iTCO_vendor_support pcspkr bluetooth > > snd_timer rtsx_pci_ms cfg80211 snd memstick ecdh_generic i2c_i801 soundcore > > ec> > > Jul 16 14:41:48 theseus kernel: CPU: 1 PID: 8349 Comm: fsfreeze Not tainted > > 5.2.0-rt1.fixes+ #16 > > Jul 16 14:41:48 theseus kernel: Hardware name: Intel Corporation > > NUC7i7BNH/NUC7i7BNB, BIOS BNKBL357.86A.0054.2017.1025.1822 10/25/2017 > > Jul 16 14:41:48 theseus kernel: RIP: 0010:debug_rt_mutex_unlock+0x47/0x50 > > Jul 16 14:41:48 theseus kernel: Code: c2 75 01 c3 e8 6a c1 3e 00 85 c0 74 > > f6 8b 05 30 3c 66 01 85 c0 75 ec 48 c7 c6 a0 b3 2e b1 48 c7 c7 48 bf 2c b1 > > e8 42 7d f8 ff <0f> 0b c3 66 0f 1f 44 00 00 c3 66 66 2e 0f 1f 84 00 00 00 > > 00 00 0f > > Jul 16 14:41:48 theseus kernel: RSP: 0018:ffffc03c5b607dd0 EFLAGS: 00010086 > > Jul 16 14:41:48 theseus kernel: RAX: 0000000000000000 RBX: ffff9a7d6deb0d98 > > RCX: 0000000000000000 > > Jul 16 14:41:48 theseus kernel: RDX: ffffffffb167ce50 RSI: 00000000ffffffff > > RDI: 00000000ffffffff > > Jul 16 14:41:48 theseus kernel: RBP: ffff9a7d6deb0ab0 R08: 0000000000000000 > > R09: ffffffffb167cd20 > > Jul 16 14:41:48 theseus kernel: R10: ffffc03c5b607d10 R11: ffffffffb2aa38eb > > R12: 0000000000000246 > > Jul 16 14:41:48 theseus kernel: R13: ffffc03c5b607e00 R14: ffffc03c5b607e10 > > R15: ffffffffb034c53f > > Jul 16 14:41:48 theseus kernel: FS: 00007fd6e2f0e540(0000) > > GS:ffff9a7d9e600000(0000) knlGS:0000000000000000 > > Jul 16 14:41:48 theseus kernel: CS: 0010 DS: 0000 ES: 0000 CR0: > > 0000000080050033 > > Jul 16 14:41:48 theseus kernel: CR2: 0000563557bc0178 CR3: 0000000792188006 > > CR4: 00000000003606e0 > > Jul 16 14:41:48 theseus kernel: Call Trace: > > Jul 16 14:41:48 theseus kernel: rt_mutex_slowunlock+0x25/0x80 > > Jul 16 14:41:48 theseus kernel: __rt_mutex_unlock+0x45/0x80 > > Jul 16 14:41:48 theseus kernel: percpu_up_write+0x1f/0x30 > > Jul 16 14:41:48 theseus kernel: thaw_super_locked+0xde/0x110 > > Jul 16 14:41:48 theseus kernel: do_vfs_ioctl+0x5de/0x720 > > Jul 16 14:41:48 theseus kernel: ksys_ioctl+0x5e/0x90 > > Jul 16 14:41:48 theseus kernel: __x64_sys_ioctl+0x16/0x20 > > Jul 16 14:41:48 theseus kernel: do_syscall_64+0x66/0xb0 > > Jul 16 14:41:48 theseus kernel: entry_SYSCALL_64_after_hwframe+0x49/0xbe > > Jul 16 14:41:48 theseus kernel: RIP: 0033:0x7fd6e2e391fb > > Jul 16 14:41:48 theseus kernel: Code: 0f 1e fa 48 8b 05 8d dc 0c 00 64 c7 > > 00 26 00 00 00 48 c7 c0 ff ff ff ff c3 66 0f 1f 44 00 00 f3 0f 1e fa b8 10 > > 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d 5d dc 0c 00 f7 d8 64 > > 89 01 48 > > Jul 16 14:41:48 theseus kernel: RSP: 002b:00007ffe61e2f498 EFLAGS: 00000246 > > ORIG_RAX: 0000000000000010 > > Jul 16 14:41:48 theseus kernel: RAX: ffffffffffffffda RBX: 0000000000000003 > > RCX: 00007fd6e2e391fb > > Jul 16 14:41:48 theseus kernel: RDX: 0000000000000000 RSI: 00000000c0045878 > > RDI: 0000000000000003 > > Jul 16 14:41:48 theseus kernel: RBP: 0000000000000003 R08: 0000000000000001 > > R09: 0000000000000000 > > Jul 16 14:41:48 theseus kernel: R10: 0000000000000000 R11: 0000000000000246 > > R12: 0000000000000002 > > Jul 16 14:41:48 theseus kernel: R13: 00007ffe61e309fa R14: 0000000000000000 > > R15: 0000000000000000 > > Jul 16 14:41:48 theseus kernel: irq event stamp: 6254 > > Jul 16 14:41:48 theseus kernel: hardirqs last enabled at (6253): > > [<ffffffffb0ac8590>] _raw_spin_unlock_irqrestore+0x60/0x90 > > Jul 16 14:41:48 theseus kernel: hardirqs last disabled at (6254): > > [<ffffffffb0ac8713>] _raw_spin_lock_irqsave+0x23/0x90 > > Jul 16 14:41:48 theseus kernel: softirqs last enabled at (3330): > > [<ffffffffb003e4a8>] fpu__clear+0x88/0x200 > > Jul 16 14:41:48 theseus kernel: softirqs last disabled at (3327): > > [<ffffffffb003e46b>] fpu__clear+0x4b/0x200 > > Jul 16 14:41:48 theseus kernel: ---[ end trace 0000000000000002 ]--- > > Jul 16 14:41:49 theseus kdumpctl[1500]: kexec: loaded kdump kernel > > Jul 16 14:41:49 theseus kdumpctl[1500]: Starting kdump: [OK] > > Looks like this is the same percpu_rwsem problem Peter is chasing down: > > https://lore.kernel.org/linux-rt-users/20190326093421.GA29508@localhost.localdomain/ > > Thanks, > > Juri Yep, that's it. Interesting that he had to run a reproducer and mine just happens on boot. -- The United States Coast Guard Ruining Natural Selection since 1790
