Date: Fri, 16 May 2014 09:23:41 -0400 From: Nicolas Haller <nicolas@boiteameuh.org> To: freebsd-stable@freebsd.org Subject: gmirror + ZFS issues Message-ID: <5376115D.5050704@boiteameuh.org>
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Hello, I've got a new server and I installed FreeBSD 10 on it. I have a problem to create a new zfs pool. The command stalls on IO wait (D state / zio->io_cv). The device for the pool is a 1.7T partition (index 4) of a gmirror device. root@daedalus:~ # uname -a FreeBSD daedalus 10.0-RELEASE-p3 FreeBSD 10.0-RELEASE-p3 #0: Tue May 13 18:31:10 UTC 2014 root@amd64-builder.daemonology.net:/usr/obj/usr/src/sys/GENERIC amd64 root@daedalus:~ # dmesg | grep ada ada0 at ahcich0 bus 0 scbus0 target 0 lun 0 ada0: <HGST HUS724020ALA640 MF6OAA70> ATA-8 SATA 3.x device ada0: Serial Number PN2134P6HE028P ada0: 600.000MB/s transfers (SATA 3.x, UDMA6, PIO 8192bytes) ada0: Command Queueing enabled ada0: 1907729MB (3907029168 512 byte sectors: 16H 63S/T 16383C) ada0: Previously was known as ad4 ada1 at ahcich1 bus 0 scbus1 target 0 lun 0 ada1: <HGST HUS724020ALA640 MF6OAA70> ATA-8 SATA 3.x device ada1: Serial Number PN2134P6HAZTVP ada1: 600.000MB/s transfers (SATA 3.x, UDMA6, PIO 8192bytes) ada1: Command Queueing enabled ada1: 1907729MB (3907029168 512 byte sectors: 16H 63S/T 16383C) ada1: Previously was known as ad6 root@daedalus:~ # gmirror status Name Status Components mirror/gm0 COMPLETE ada0 (ACTIVE) ada1 (ACTIVE) root@daedalus:~ # gpart show => 63 3907029104 mirror/gm0 MBR (1.8T) 63 3907029042 1 freebsd [active] (1.8T) 3907029105 62 - free - (31K) => 0 3907029042 mirror/gm0s1 BSD (1.8T) 0 204800000 1 freebsd-ufs (98G) 204800000 20971520 2 freebsd-swap (10G) 225771520 3681257522 4 freebsd-ufs (1.7T) So the blocked command is the following: root@daedalus:~ # zpool create tank /dev/mirror/gm0s1d root@daedalus:~ # ps -O comm,mwchan PID COMMAND MWCHAN TT STAT TIME COMMAND 1104 getty ttyin v0 Is+ 0:00.00 /usr/libexec/getty Pc ttyv0 1105 getty ttyin v1 Is+ 0:00.00 /usr/libexec/getty Pc ttyv1 1106 getty ttyin v2 Is+ 0:00.00 /usr/libexec/getty Pc ttyv2 1107 getty ttyin v3 Is+ 0:00.00 /usr/libexec/getty Pc ttyv3 1108 getty ttyin v4 Is+ 0:00.00 /usr/libexec/getty Pc ttyv4 1109 getty ttyin v5 Is+ 0:00.00 /usr/libexec/getty Pc ttyv5 1110 getty ttyin v6 Is+ 0:00.00 /usr/libexec/getty Pc ttyv6 1111 getty ttyin v7 Is+ 0:00.00 /usr/libexec/getty Pc ttyv7 85215 csh pause 2 Ss 0:00.12 /bin/csh 86210 ps - 2 R+ 0:00.00 ps -O comm,mwchan 85081 csh pause 0 Is 0:00.01 -csh (csh) 85084 screen pause 0 S+ 0:00.11 screen 85086 csh pause 1 Is 0:00.12 /bin/csh 85159 zpool zio->io_ 1 D+ 0:00.00 zpool create tank /dev/mirror/gm0s1d root@daedalus:/proc/85159 # cat status zpool 85159 1 85159 85086 pts/1 ctty 1400242849,897702 0,0 0,1876 zio->io_cv 0 0 0,0,5 - There is no activity on disks: root@daedalus:~ # iostat 1 tty ada0 ada1 pass0 cpu tin tout KB/t tps MB/s KB/t tps MB/s KB/t tps MB/s us ni sy in id 0 41 124.91 457 55.80 125.92 454 55.80 0.00 0 0.00 0 0 0 0 99 0 465 0.00 0 0.00 0.00 0 0.00 0.00 0 0.00 0 0 0 0 100 0 155 0.00 0 0.00 0.00 0 0.00 0.00 0 0.00 0 0 0 0 100 0 151 0.00 0 0.00 0.00 0 0.00 0.00 0 0.00 0 0 0 0 100 I have also a FreeBSD 9.0-RELEASE-p3 setup the same way and it works like a charm. (but not the same hardware on this one) Actually, I'm trying to zeroing the partition, we never know :-) Anyone has an idea ? Thanks, -- Nicolas Haller
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