flashcache 3.1.3+git20150701-5ubuntu2 ADT test failure with linux 4.13.0-13.14

[Seth Forshee]

Testing failed on:
    i386: https://objectstorage.prodstack4-5.canonical.com/v1/AUTH_77e2ada1e7a84929a74ba3b87153c0ac/autopkgtest-artful-canonical-kernel-team-bootstrap/artful/i386/f/flashcache/20170930_123213_90a2e@/log.gz
    ppc64el: https://objectstorage.prodstack4-5.canonical.com/v1/AUTH_77e2ada1e7a84929a74ba3b87153c0ac/autopkgtest-artful-canonical-kernel-team-bootstrap/artful/ppc64el/f/flashcache/20170930_123603_90a2e@/log.gz

[Seth Forshee (sforshee)]

i386:

utopkgtest [12:29:40]: test test_flashcache.sh: [-----------------------
II: Checking for 5G available disk space...OK
II: Creating loop files:
II: - backing-9590.img...OK
II: - cache-9590.img...OK
II: Connecting to loop devices:
II: - backing-9590.img -> /dev/loop0...OK
II: - cache-9590.img -> /dev/loop1...OK
II: Loading flashcache module...FAILED!
modprobe: ERROR: could not insert 'flashcache': Unknown symbol in module, or unknown parameter (see dmesg)
II: Detaching /dev/loop1...
II: Detaching /dev/loop0...
II: Deleting file images...
EE: FAIL
autopkgtest [12:29:43]: test test_flashcache.sh: -----------------------]
autopkgtest [12:29:45]: test test_flashcache.sh: - - - - - - - - - - results - - - - - - - - - -
test_flashcache.sh FAIL non-zero exit status 1
autopkgtest [12:29:45]: test test_flashcache.sh: - - - - - - - - - - stderr - - - - - - - - - -
modprobe: ERROR: could not insert 'flashcache': Unknown symbol in module, or unknown parameter (see dmesg)
autopkgtest [12:29:46]: @@@@@@@@@@@@@@@@@@@@ summary
test_flashcache.sh FAIL non-zero exit status 1

[Seth Forshee (sforshee)]

ppc64el:

autopkgtest [12:33:11]: test test_flashcache.sh: [-----------------------
II: Checking for 5G available disk space...OK
II: Creating loop files:
II: - backing-9821.img...OK
II: - cache-9821.img...OK
II: Connecting to loop devices:
II: - backing-9821.img -> /dev/loop0...OK
II: - cache-9821.img -> /dev/loop1...OK
II: Loading flashcache module...OK
II: Creating flashcache logical device...
device-mapper: reload ioctl on fctgt failed: Invalid argument
cachedev fctgt, ssd_devname /dev/loop1, disk_devname /dev/loop0 cache mode WRITE_BACK
block_size 8, md_block_size 8, cache_size 2097152
Flashcache metadata will use 5MB of your 1513MB main memory
Command failed
echo 0 8388608 flashcache /dev/loop0 /dev/loop1 fctgt 1 2 8 2097152 512 0 0 8 | dmsetup create fctgt failed
FAILED!
II: Detaching /dev/loop1...
II: Detaching /dev/loop0...
II: Deleting file images...
EE: FAIL
autopkgtest [12:33:13]: test test_flashcache.sh: -----------------------]
autopkgtest [12:33:15]: test test_flashcache.sh: - - - - - - - - - - results - - - - - - - - - -
test_flashcache.sh FAIL non-zero exit status 1
autopkgtest [12:33:15]: test test_flashcache.sh: - - - - - - - - - - stderr - - - - - - - - - -
device-mapper: reload ioctl on fctgt failed: Invalid argument
Command failed
echo 0 8388608 flashcache /dev/loop0 /dev/loop1 fctgt 1 2 8 2097152 512 0 0 8 | dmsetup create fctgt failed

[Seth Forshee (sforshee)]

Testing on i386, I suspect the problem is that we have a different gcc version building the kernel versus the one which build the dkms module.

[Seth Forshee (sforshee)]

flashcache tests all passed with the last two uploads, so closing.