DF-2626 / serial_wedge2.log
Swap: 4096M Total, 4096M Free
PID USERNAME NICE SIZE RES STATE C TIME CTIME CPU COMMAND
988 maxx 0 4192K 708K CPU2 2 0:03 0:03 99.85% df2626poc
710 root 0 25M 2972K kqread 0 0:00 0:00 0.00% sshd
68 root 0 42M 2216K kqread 4 0:00 0:00 0.00% hammer2
801 root 0 6932K 932K ttyin 4 0:00 0:00 0.00% getty
981 root 0 4316K 672K piperd 4 0:00 0:00 0.00% tee
466 root 0 7268K 896K kqread 4 0:00 0:00 0.00% syslogd
971 root 0 19M 2268K pause 5 0:00 0:00 0.00% csh
=== top snapshot #2 (4s later)
load averages: 0.16, 0.07, 0.02; up 0+00:02:55 20:16:45
27 processes: 2 running, 25 sleeping
CPU states: 0.0% user, 0.0% nice, 16.6% system, 0.0% interrupt, 83.3% idle
Memory: 168M Active, 4200K Inact, 561M Wired, 56K Cache, 148M Buf, 3313M Free
Swap: 4096M Total, 4096M Free
PID USERNAME NICE SIZE RES STATE C TIME CTIME CPU COMMAND
988 maxx 0 4192K 708K CPU2 2 0:08 0:08 99.85% df2626poc
710 root 0 25M 2972K kqread 0 0:00 0:00 0.00% sshd
981 root 0 4316K 672K piperd 4 0:00 0:00 0.00% tee
68 root 0 42M 2216K kqread 4 0:00 0:00 0.00% hammer2
801 root 0 6932K 932K ttyin 4 0:00 0:00 0.00% getty
466 root 0 7268K 896K kqread 4 0:00 0:00 0.00% syslogd
971 root 0 19M 2268K pause 5 0:00 0:00 0.00% csh
=== ps detail
PID UID STAT %CPU TIME WCHAN UCOMM
988 1001 R2 100.0 0:08.02 - df2626poc
=== kill -9 988 attempt 1
kill(9) syscall returned 0
PID UID STAT %CPU TIME WCHAN UCOMM
988 1001 R2 100.0 0:11.02 - df2626poc
>>> STILL ALIVE after kill -9 <<<
=== kill -9 attempt 2
PID UID STAT %CPU TIME WCHAN UCOMM
988 1001 R2 100.0 0:15.02 - df2626poc
>>> STILL ALIVE after 2nd kill -9 <<<
=== vmstat 1s x4 (watch sys%)
--procs-- ---memory-- -------paging------ --disks-- -----faults------ ---cpu---
r b w fre flt re pi po fr vb0 md0 int sys ctx us sy id
2 0 0 3.24G 223 0 0 0 44K 0 0 1.49K 85 603 0 17 83
2 0 0 3.24G 14 0 0 0 0 0 0 1.48K 16 598 0 17 83
2 0 0 3.24G 0 0 0 0 0 0 0 1.49K 14 600 0 17 83
=== df2626.out final: DF-2626: fd=3 dest=0x10000000 (PROT_NONE) len=4096 — calling read(), bug = never returns
=== DF-2626 RUN3 COMPLETE Fri Aug 28 20:16:55 UTC 2026
=== DF-2626 WEDGE Fri Aug 28 20:17:44 UTC 2026 ncpu=6
4+0 records in
4+0 records out
262144 bytes transferred in 0.000153 secs (1709003194 bytes/sec)
tmpfs_read uiomove error 14
=== reader pid=988 on /tmp/df2626file (hammer2 /)
PID UID STAT %CPU WCHAN UCOMM
988 1001 R2 100.0 - df2626poc
=== collateral: root truncate + rm of the spun-on file (expect D-state)
TRUNCATE RETURNED 0
RM RETURNED 0
PID UID STAT WCHAN UCOMM
=== (kill -9 sent to hung truncate/rm; expect them to survive too)
=== launching 5 more readers -> all 6 CPUs
=== DF-2626 WEDGE2 Fri Aug 28 20:21:57 UTC 2026 ncpu=6