Error during regression tests. #233
Comments
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Your not doing anything wrong, this is actually a bit of a known issue. Unfortunately, the regression tests can no longer be entirely run in-tree. They've grown certain dependencies on zvol udev rules which are installed as part of the packages. If you build and install both the spl+zfs then run the regression tests they should work. They will be installed as part of the zfs-test package in /usr/libexec/zfs/. Longer term I'm conflicted if this should be fixed to run in-tree(somehow), or if all the tests should simply be moved out of the zfs package in to their own full zfs regression test suite package. |
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Sorry for my inaccurate bug report, I was running all of the tests from /usr/libexec/zfs, not from in-tree. Any further suggestions? |
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Oh... then this is a little more troubling. The test is likely failing because the symlinks for the zvol devices aren't being created. The most common reason is there's a problem with the 60-zvol.rules udev rule on your system. Basically, when you load the zfs module /dev/zdN devices are created for all the zvols, udev then creates symlinks to these devices with the help of the zvol_id helper. The first thing I'd verify after the test failure is that the /dev/zdN devices exist. If they do then it's definitely a problem with the udev rule. Unfortunately, exactly how to write a udev rule can differ slightly based on your exact version of udev. We've tried to provide one that's as portable as possible but you may have some some corner case. |
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Same on Arch Linux with recent SPL&ZFS from GIT: zfs create -s -V 100g storage/thinvol/dev/storage/thinvol may not be immediately available The /dev/zd0 exists, but there is no /dev/storage/thinvol available. |
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These udev rules issues are believed to have been resolved. |
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I'm having the same issue today: Debian 6.0.7 spl+zfs 0.6.1 compiled from source and installed: # uname -a
Linux ksA1 2.6.32-18-pve #1 SMP Mon Jan 21 12:09:05 CET 2013 x86_64 GNU/Linux
# /usr/local/share/zfs/zconfig.sh -c
1 persistent zpool.cache Pass
2 scan disks for pools to import Pass
3 zpool import/export device /dev/tank/volume may not be immediately available
Error: Could not stat device /dev/zvol/tank/volume - No such file or directory.
Fail (4)
# ll /dev/zd*
brw-rw---- 1 root disk 230, 0 Apr 8 05:21 /dev/zd0
# zpool list
NAME SIZE ALLOC FREE CAP DEDUP HEALTH ALTROOT
tank 1000M 360K 1000M 0% 1.00x ONLINE -
# zfs list
NAME USED AVAIL REFER MOUNTPOINT
tank 104M 363M 43.3K /tank
tank/volume 103M 466M 23.9K -
# ll /dev/ta*
ls: cannot access /dev/ta*: No such file or directory
# /usr/local/share/zfs/zfault.sh -c
raid0 raid10 raidz raidz2 raidz3
1 soft write error cannot create 'tank': I/O error
cannot open 'tank': no such pool
Fail (3)
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The lack of /dev/zvol/pool/datset links is usually caused by the udev rules not being properly installed. When configuring for your system make sure you use the following options to ensure they're installed in the right place. |
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I recompiled with: ./configure --with-udevdir=/lib/udevnow I have: # /usr/local/share/zfs/zconfig.sh -c
Skipping test 10 which requires the scsi_debug module and the /usr/bin/lsscsi utility
1 persistent zpool.cache Pass
2 scan disks for pools to import Pass
3 zpool import/export device Pass
4 zpool insmod/rmmod device Pass
5 zvol+ext2 volume Warning: specified blocksize 4096 is less than device physical sectorsize 8192, forced to continue
Pass
6 zvol+ext2 snapshot Warning: specified blocksize 4096 is less than device physical sectorsize 8192, forced to continue
Pass
7 zvol+ext2 clone Warning: specified blocksize 4096 is less than device physical sectorsize 8192, forced to continue
Pass
8 zfs send/receive Warning: specified blocksize 4096 is less than device physical sectorsize 8192, forced to continue
Pass
9 zpool events Pass
10 zpool add/remove vdev Skiphowever # /usr/local/share/zfs/zfault.sh -c
raid0 raid10 raidz raidz2 raidz3
1 soft write error cannot create 'tank': I/O error
cannot open 'tank': no such pool
Fail (3)and # ll /dev/z*
crw-rw-rw- 1 root root 1, 5 Apr 9 07:35 /dev/zero
crw------- 1 root root 10, 56 Apr 9 07:38 /dev/zfsalso in "/lib/udev/rules.d/" I had a file "90-zfs.rules.disabled" which I renamed to "90-zfs.rules" (and reboot). I'm completly confused... zfs works fine on all my systems and I love it! but I feel I'm missing something more than just the test scripts... |
On very fragmented pools, there may be no large free chunks in the normal allocation class (e.g. ~64KB, the size of compressed indirect blocks). This will cause the allocation to fall back on the embedded slog metaslab. This can cause the embedded slog metaslab to become full/fragmented enough that ZIL allocations fail, causing sync writes to fall back on txg_wait_synced(), which is very very slow. To address this problem, this commit makes allocations try to gang before allowing the embedded slog metaslab to be used for normal allocations. Although ganging is slow (it's roughly 25% of normal performance, because we do ~4 writes for each block), it's much better than sync writes whose ZIL allocation fails, which can be 0.1% normal performance (txg_wait_synced() could take 10 seconds compared to a 10ms write). Additionally, when writing a Gang Block Header (GBH), if the allocation from the normal class fails, retry it from the embedded slog. The GBH is 512 bytes, so it can only fail when the class is completely full. This change doesn't impact performance but it prevents an unnecessary allocation failure on small, extremely full pools, where there is zero free space in the normal class.
I compiled SPL and ZFS 0.6.0-rc4 on Ubuntu 10.10 today and experienced problems with the regression tests.
OS: Ubuntu 10.10
Kernel: Linux ubuntu10 2.6.35-28-generic #50-Ubuntu SMP Fri Mar 18 18:42:20 UTC 2011 x86_64 GNU/Linux
SPL/ZFS: 0.6.0-rc4
Both SPL and ZFS compiled with './configure --prefix /usr; make; sudo make install'.
Modules load fine into Kernel, 'splat -a' reports no errors.
The first two tests of 'zconfig.sh -c' run fine, from the third test on I get errors:
$> zconfig.sh -c
1 persistent zpool.cache Pass
2 scan disks for pools to import Pass
3 zpool import/export device /dev/tank/volume may not be immediately available
Fail (4)
$> zconfig.sh -c -v
Destroying
1 persistent zpool.cache Pass
2 scan disks for pools to import Pass
3 zpool import/export device /dev/tank/volume may not be immediately available
Fail (4)
$> sudo /usr/libexec/zfs/zconfig.sh -c -v -s 3
Destroying
1 persistent zpool.cache Pass
2 scan disks for pools to import Pass
3 zpool import/export device Skip
4 zpool insmod/rmmod device /dev/tank/volume may not be immediately available
Fail (4)
Am I doing something wrong? I tested 0.5.2 right before 0.6.0-rc4 and all regession tests ran fine....
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