On 11/29/2017 09:09 AM, Ingo Molnar wrote:
* Jarkko Nikula <[email protected]> wrote:HiSuspend-to-ram and resume stopped working on v4.15-rc1 and I bisected it to commit ca37e57bbe0c ("x86/entry/64: Add missing irqflags tracing to native_load_gs_index()").I noticed it on Intel Kabylake (core) and Apollolake (atom) based prototype machines. Symptoms are that machine appears to enterinto suspend but resumes instantly and hangs. Unfortunately no logs. If I revert ca37e57bbe0c on v4.15-rc1 it works as expected.Hm, that commit looks broken with irq-tracing enabled. Does the patch below fix it?
No, it makes the machine not to boot at all :-(Log below when I used my config (now attached). With x86_64_defconfig it booted twice but didn't survive suspend/resume. However several other boot attempts with x86_64_defconfig failed somewhat similarly. Not in the same place but hanging anyway. With my own config it seems to always end up failing in trace_hardirqs_off_caller.
Then I noticed suspend/resume is not working on v4.14 either when I use the x86_64_defconfig. Maybe unrelated issue.
... [ 1.917851] clocksource: tsc: mask: 0xffffffffffffffff max_cycles: 0x19f2297dd97, max_idle_ns: 440795236593 ns [ 1.929795] workingset: timestamp_bits=62 max_order=21 bucket_order=0 [ 1.939699] BUG: stack guard page was hit at ffffc90000233ff8 (stack is ffffc90000234000..ffffc90000237fff) ** 606 printk messages dropped ** [ 1.940339] ? native_iret+0x7/0x7 [ 1.940340] ? error_entry+0x6f/0xc0 [ 1.940341] error_entry+0x6f/0xc0 [ 1.940342] RIP: 0010:trace_hardirqs_off_caller+0x8/0xc0 [ 1.940342] RSP: 0000:ffffc90000257048 EFLAGS: 00010093 ORIG_RAX: 0000000000000000 [ 1.940343] RAX: 000000008168ad47 RBX: 0000000000000001 RCX: ffffffff8168ad47 [ 1.940343] RDX: ffff8802b505bb28 RSI: 0000000000000000 RDI: ffffffff8168b5ef [ 1.940344] RBP: ffffc900002570a0 R08: 00000000ebddc52a R09: 0000000000000001 [ 1.940344] R10: 0000000000000000 R11: 0000000000000000 R12: ffff8802b505a840 [ 1.940345] R13: ffff8802b505b048 R14: ffff8802b39dc800 R15: ffff8802b505a840 [ 1.940346] ? page_fault+0xc/0x30 [ 1.940347] ? native_iret+0x7/0x7 [ 1.940348] ? error_entry+0x6f/0xc0 [ 1.940349] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 1.940350] ? native_iret+0x7/0x7 [ 1.940351] ? error_entry+0x6f/0xc0 [ 1.940352] error_entry+0x6f/0xc0 [ 1.940353] RIP: 0010:trace_hardirqs_off_caller+0x8/0xc0 [ 1.940353] RSP: 0000:ffffc90000257168 EFLAGS: 00010093 ORIG_RAX: 0000000000000000 [ 1.940354] RAX: 000000008168ad47 RBX: 0000000000000001 RCX: ffffffff8168ad47 [ 1.940354] RDX: ffff8802b505bb28 RSI: 0000000000000000 RDI: ffffffff8168b5ef [ 1.940355] RBP: ffffc900002571c0 R08: 00000000ebddc52a R09: 0000000000000001 [ 1.940355] R10: 0000000000000000 R11: 0000000000000000 R12: ffff8802b505a840 [ 1.940356] R13: ffff8802b505b048 R14: ffff8802b39dc800 R15: ffff8802b505a840 [ 1.940357] ? page_fault+0xc/0x30 [ 1.940358] ? native_iret+0x7/0x7 [ 1.940359] ? error_entry+0x6f/0xc0 [ 1.940360] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 1.940361] ? native_iret+0x7/0x7 [ 1.940362] ? error_entry+0x6f/0xc0 [ 1.940363] error_entry+0x6f/0xc0 and this continues. -- Jarkko
x86_64-4.15.config.gz
Description: application/gzip
