Hi Steven, FYI, we noticed that your commit a9f180345f5378ac87d80ed0bea55ba421d83859 ("compiler/gcc4: Make quirk for asm_volatile_goto() unconditional") fixed a number of machine boot failures in our LKP test farm. This is really helpful! Our gcc version is 4.9.1 (Debian 4.9.1-11). 569d6557ab957d6 a9f180345f5378ac87d80ed0b --------------- ------------------------- %stddev %change %stddev \ | / 1 ± 0% -100.0% 0 ± 0% lkp-st02/dd-write/5m-11HDD-RAID5-cfq-btrfs-100dd 1 ± 0% -100.0% 0 ± 0% TOTAL dmesg.kernel_BUG_at_fs/nfs/pagelist.c 569d6557ab957d6 a9f180345f5378ac87d80ed0b --------------- ------------------------- 1 ± 0% -100.0% 0 ± 0% lkp-st02/dd-write/5m-11HDD-RAID5-cfq-btrfs-100dd 1 ± 0% -100.0% 0 ± 0% TOTAL dmesg.Kernel_panic-not_syncing:Fatal_exception 569d6557ab957d6 a9f180345f5378ac87d80ed0b --------------- ------------------------- 1 ± 0% -100.0% 0 ± 0% lkp-st02/dd-write/5m-11HDD-RAID5-cfq-btrfs-100dd 1 ± 0% -100.0% 0 ± 0% TOTAL dmesg.invalid_opcode 569d6557ab957d6 a9f180345f5378ac87d80ed0b --------------- ------------------------- 1 ± 0% -100.0% 0 ± 0% ivb42/will-it-scale/futex4 1 ± 0% -100.0% 0 ± 0% ivb44/fsmark/1x-1t-1HDD-xfs-4M-60G-NoSync 1 ± 0% -100.0% 0 ± 0% ivb44/fsmark/1x-64t-1BRD_48G-btrfs-4M-40G-fsyncBeforeClose 1 ± 0% -100.0% 0 ± 0% lkp-bdw01/blogbench/1SSD-btrfs 1 ± 0% -100.0% 0 ± 0% lkp-hsw01/vm-scalability/300s-anon-rx-rand-mt 1 ± 0% -100.0% 0 ± 0% lkp-sbx04/will-it-scale/futex3 1 ± 0% -100.0% 0 ± 0% lkp-sbx04/will-it-scale/page_fault3 1 ± 0% -100.0% 0 ± 0% lkp-st02/dd-write/5m-11HDD-RAID5-cfq-btrfs-100dd 8 ± 0% -100.0% 0 ± 0% TOTAL last_state.is_incomplete_run 569d6557ab957d6 a9f180345f5378ac87d80ed0b --------------- ------------------------- 1 ± 0% -100.0% 0 ± 0% ivb42/will-it-scale/futex4 1 ± 0% -100.0% 0 ± 0% ivb44/fsmark/1x-1t-1HDD-xfs-4M-60G-NoSync 1 ± 0% -100.0% 0 ± 0% ivb44/fsmark/1x-64t-1BRD_48G-btrfs-4M-40G-fsyncBeforeClose 1 ± 0% -100.0% 0 ± 0% lkp-bdw01/blogbench/1SSD-btrfs 1 ± 0% -100.0% 0 ± 0% lkp-hsw01/vm-scalability/300s-anon-rx-rand-mt 1 ± 0% -100.0% 0 ± 0% lkp-sbx04/will-it-scale/futex3 1 ± 0% -100.0% 0 ± 0% lkp-sbx04/will-it-scale/page_fault3 1 ± 0% -100.0% 0 ± 0% lkp-st02/dd-write/5m-11HDD-RAID5-cfq-btrfs-100dd 8 ± 0% -100.0% 0 ± 0% TOTAL last_state.booting Thanks, Fengguang