I can still reproduce landisk stalling during a cvs update, after having
baken a full muild and xenocara. This time with the kernel-side
traceback of the process stuck in pmrwait.
ddb> ps
PID TID PPID UID S FLAGS WAIT COMMAND
22735 236842 22266 1500 3 0x100003 pmrwait ssh
22266 24911 8155 1500 3 0x100003 biowait cvs
25498 116159 90374 1500 3 0x100083 ttyin ksh
8155 467717 90374 1500 3 0x10008b sigsusp ksh
90374 138597 98462 1500 3 0x10 biowait sshd-session
98462 191897 15001 0 3 0x92 kqread sshd-session
57416 152946 1 0 3 0x100003 biowait getty
42265 403899 1 0 3 0x100098 kqread cron
99827 455058 1 0 3 0x100090 kqread inetd
70128 215727 4854 95 3 0x1100092 kqread smtpd
8281 217519 4854 103 3 0x1100092 kqread smtpd
76435 92448 4854 95 3 0x1100092 kqread smtpd
1915 373935 4854 95 3 0x100092 kqread smtpd
91271 501146 4854 95 3 0x1100092 kqread smtpd
36815 115371 4854 95 3 0x1100092 kqread smtpd
4854 296662 1 0 3 0x100080 kqread smtpd
15001 426794 1 0 3 0x88 kqread sshd
5586 268874 0 0 3 0x14280 nfsidl nfsio
86082 74082 0 0 3 0x14280 nfsidl nfsio
4201 354622 0 0 3 0x14280 nfsidl nfsio
9170 1439 0 0 3 0x14280 nfsidl nfsio
7090 276569 1 0 3 0 biowait ypbind
47046 449110 1 28 3 0x1100010 biowait portmap
95989 36830 1 0 3 0x100080 kqread ntpd
53651 165033 76253 83 3 0x100092 kqread ntpd
76253 352661 1 83 3 0x1100092 kqread ntpd
39789 280571 4078 74 3 0x1100092 bpf pflogd
4078 55888 1 0 3 0x80 sbwait pflogd
84079 106662 16372 73 3 0x1100090 kqread syslogd
16372 35927 1 0 3 0x100082 sbwait syslogd
78962 437988 31797 115 3 0x100092 kqread slaacd
85919 478332 31797 115 3 0x100092 kqread slaacd
31797 480049 1 0 3 0x100080 kqread slaacd
27846 437548 0 0 3 0x14200 bored smr
41958 344917 0 0 3 0x14200 pgzero zerothread
6076 129835 0 0 3 0x14200 aiodoned aiodoned
84866 363355 0 0 3 0x14200 syncer update
87134 418449 0 0 3 0x14200 cleaner cleaner
53321 503280 0 0 3 0x14200 reaper reaper
88581 91939 0 0 3 0x14200 pgdaemon pagedaemon
45312 521165 0 0 3 0x14200 usbtsk usbtask
37631 261918 0 0 3 0x14200 usbatsk usbatsk
18147 310057 0 0 3 0x14200 bored softnet0
37766 422281 0 0 3 0x14200 bored systqmp
83868 57728 0 0 3 0x14200 bored systq
62182 91648 0 0 3 0x40014200 tmoslp softclock
* 973 455824 0 0 7 0x40014200 idle0
1 152093 0 0 3 0x82 wait init
0 0 -1 0 3 0x10200 scheduler swapper
ddb> show uvmexp
Current UVM status:
pagesize=4096 (0x1000), pagemask=0xfff, pageshift=12
14864 VM pages: 3 active, 1 inactive, 1 wired, 10118 free (1280 zero)
freemin=495, free-target=660, inactive-target=661, wired-max=4954
faults=145296324, traps=74992724, intrs=26647938, ctxswitch=14048753 fpuswitc
h=0
softint=12776668, syscalls=74992722, kmapent=8
fault counts:
noram=996715, noanon=0, noamap=0, pgwait=23949, pgrele=0
relocks=1867838(14104), upgrades=0(0) anget(retries)=57776611(585752), amap
copy=23259327
neighbor anon/obj pg=39185700/89679236, gets(lock/unlock)=26907893/1286410
cases: anon=47576129, anoncow=10190414, obj=23737048, prcopy=3166521, przer
o=60563995
daemon and swap counts:
woke=1566238, revs=284861851, scans=2683067, obscans=506886, anscans=181199
8
busy=0, freed=1421072, reactivate=363889, deactivate=8877746
pageouts=179395, pending=144550, nswget=539823
nswapdev=1
swpages=4194415, swpginuse=4625, swpgonly=4621 paging=3
kernel pointers:
objs(kern)=0x8c3cccfc
ddb> show bcstats
Current Buffer Cache status:
numbufs 183 busymapped 1, delwri 0
kvaslots 185 avail kva slots 184
bufpages 678, dmapages 678, dirtypages 0
pendingreads 1, pendingwrites 1
highflips 0, highflops 0, dmaflips 0
ddb> tr /t 0t236842
mi_switch() at mi_switch+0x8a
sleep_finish() at sleep_finish+0xb8
msleep_nsec() at msleep_nsec+0xdc
uvm_wait_pla() at uvm_wait_pla+0x90
uvm_pmr_getpages() at uvm_pmr_getpages+0x87a
km_alloc() at km_alloc+0x24c
pool_multi_alloc() at pool_multi_alloc+0x7a
m_pool_alloc() at m_pool_alloc+0x36
pool_allocator_alloc() at pool_allocator_alloc+0x18
pool_p_alloc() at pool_p_alloc+0x3e
pool_do_get() at pool_do_get+0x174
pool_get() at pool_get+0xba
m_clget() at m_clget+0x38
m_getuio() at m_getuio+0xa6
sosend() at sosend+0x218
soo_write() at soo_write+0x28
dofilewritev() at dofilewritev+0x7e
sys_write() at sys_write+0x40
syscall() at syscall+0x2ca
(EXPEVT 160; SSR=00000001) at 0x39dd9a30
