New: Processes hang on attempted access of WDC WD30-EZRX 3TB HDD on HP Z420 Workstation
https://bugzilla.kernel.org/show_bug.cgi?id=197875
Bug ID: 197875
Summary: Processes hang on attempted access of WDC WD30-EZRX
3TB HDD on HP Z420 Workstation
Product: IO/Storage
Version: 2.5
Kernel Version: 4.13.x
Hardware: Intel
OS: Linux
Tree: Mainline
Status: NEW
Severity: normal
Priority: P1
Component: SCSI
Assignee: [email protected]
Reporter: [email protected]
Regression: NoWhen booted under kernel 4.13.x, processes (such as parted, boot-info, gparted, etc) always hang when attempting to run due to a Western Digital Green WD30-EZRX 3TB HDD. Drive works as expected under kernel 4.10.x (even when all other things are the same about the system but only booted kernel is different).
Full specs of the machine if useful:
https://www.support.hp.com/id-en/document/c03277050
More details on Ubuntu's LaunchPad (where they asked me to come here to file an upstream bug): https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1730746
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[Bug 197875] Processes hang on attempted access of WDC WD30-EZRX 3TB HDD on HP Z420 Workstation
https://bugzilla.kernel.org/show_bug.cgi?id=197875
Chuck Burt ([email protected]) changed:
What |Removed |Added
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Kernel Version|4.13.x |4.13+
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[Bug 197875] Processes hang on attempted access of WDC WD30-EZRX 3TB HDD on HP Z420 Workstation
In reply to [email protected]https://bugzilla.kernel.org/show_bug.cgi?id=197875
Bart Van Assche ([email protected]) changed:
What |Removed |Added
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CC| |[email protected]
--- Comment #1 from Bart Van Assche ([email protected]) --- Please provide the output of the following command after having reproduced the hang:
dmesg -c >/dev/null; echo w > /proc/sysrq-trigger; dmesg
Additionally, if you know how to build the kernel yourself, it would be helpful if you could bisect this issue. Documentation is available e.g. at
https://git-scm.com/docs/git-bisect.
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[Bug 197875] Processes hang on attempted access of WDC WD30-EZRX 3TB HDD on HP Z420 Workstation
In reply to [email protected]https://bugzilla.kernel.org/show_bug.cgi?id=197875
--- Comment #2 from Chuck Burt ([email protected]) --- Created attachment 260925
--> https://bugzilla.kernel.org/attachment.cgi?id=260925&action=edit
Output of requested command
I reproduced the hang and ran the command as requested. See attached file output-20171129.txt
Building the kernel is something I could attempt tackling, but as a newbie I'm highly likely to mess something up. Either way, it will be a few weeks before I can get to it (best case). So I _really_ hope this provides the clue needed!
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[Bug 197875] Processes hang on attempted access of WDC WD30-EZRX 3TB HDD on HP Z420 Workstation
In reply to [email protected]https://bugzilla.kernel.org/show_bug.cgi?id=197875
--- Comment #3 from Chuck Burt ([email protected]) --- Created attachment 260927
--> https://bugzilla.kernel.org/attachment.cgi?id=260927&action=edit
Output of requested command as su
After reading the first few lines of the last attachment, it occurred to me that running this command as su might be useful. See attached.
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[Bug 197875] Processes hang on attempted access of WDC WD30-EZRX 3TB HDD on HP Z420 Workstation
In reply to [email protected]https://bugzilla.kernel.org/show_bug.cgi?id=197875
Chuck Burt ([email protected]) changed:
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Attachment #260927|0 |1
is obsolete| |
--- Comment #4 from Chuck Burt ([email protected]) --- Created attachment 260929
--> https://bugzilla.kernel.org/attachment.cgi?id=260929&action=edit
Output of requested command as su
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[Bug 197875] Processes hang on attempted access of WDC WD30-EZRX 3TB HDD on HP Z420 Workstation
In reply to [email protected]https://bugzilla.kernel.org/show_bug.cgi?id=197875
--- Comment #5 from Bart Van Assche ([email protected]) ---
So command processing got stuck. Since there are two code paths in recent kernels we need to know whether or not scsi-mq was used. Hence please provide the output of the following command:
for d in /sys/block/*; do sfx=""; [ -e "$d/mq" ] && sfx=" [mq]"; echo "$d$sfx"; done
If the above command reports that scsi-mq is being used for the WDC disk, please check whether the following command resolves the lockup:
for d in /sys/kernel/debug/block/*/state; do echo kick >$d; done
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[Bug 197875] Processes hang on attempted access of WDC WD30-EZRX 3TB HDD on HP Z420 Workstation
In reply to [email protected]https://bugzilla.kernel.org/show_bug.cgi?id=197875
--- Comment #6 from Chuck Burt ([email protected]) ---
Quoted 14 lines
# for d in /sys/block/*; do sfx=""; [ -e "$d/mq" ] && sfx=" [mq]"; echo "$d$sfx"; done /sys/block/loop0 [mq] /sys/block/loop1 [mq] /sys/block/loop2 [mq] /sys/block/loop3 [mq] /sys/block/loop4 [mq] /sys/block/loop5 [mq] /sys/block/loop6 [mq] /sys/block/loop7 [mq] /sys/block/sda /sys/block/sdb /sys/block/sdc /sys/block/sr0
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[Bug 197875] Processes hang on attempted access of WDC WD30-EZRX 3TB HDD on HP Z420 Workstation
In reply to [email protected]https://bugzilla.kernel.org/show_bug.cgi?id=197875
--- Comment #7 from Bart Van Assche ([email protected]) --- That's weird, there are no known queue lockup bugs in the legacy block/SCSI core layers. Is the WDC harddisk perhaps controlled by a HBA? Can you provide the output of lspci (run as root)?
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[Bug 197875] Processes hang on attempted access of WDC WD30-EZRX 3TB HDD on HP Z420 Workstation
In reply to [email protected]https://bugzilla.kernel.org/show_bug.cgi?id=197875
--- Comment #8 from Chuck Burt ([email protected]) --- Created attachment 260953
--> https://bugzilla.kernel.org/attachment.cgi?id=260953&action=edit
Output of lspci on 4.10.x kernel
I won't be able to boot into the newer kernel for about a week, however since lspci is hardware-oriented, sharing the output under the older kernel in case it's helpful. Please let me know if you want me to run it on the new one instead and I'll get it when I can.
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[Bug 197875] Processes hang on attempted access of WDC WD30-EZRX 3TB HDD on HP Z420 Workstation
In reply to [email protected]https://bugzilla.kernel.org/show_bug.cgi?id=197875
--- Comment #9 from Bart Van Assche ([email protected]) ---
My hope was that the list of PCI devices would show a PCI HBA of which the driver has been modified recently. Since that's not the case I'm out of ideas about what could be the root cause of this bug. Unless someone else has an idea about how to find the root cause of this issue I think your only option is to perform a bisect of the Linux kernel.
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[Bug 197875] Processes hang on attempted access of WDC WD30-EZRX 3TB HDD on HP Z420 Workstation
In reply to [email protected]https://bugzilla.kernel.org/show_bug.cgi?id=197875
Gabriel Carter ([email protected]) changed:
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[Bug 197875] Processes hang on attempted access of WDC WD30-EZRX 3TB HDD on HP Z420 Workstation
In reply to [email protected]https://bugzilla.kernel.org/show_bug.cgi?id=197875
Jerry Smith ([email protected]) changed:
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[Bug 197875] Processes hang on attempted access of WDC WD30-EZRX 3TB HDD on HP Z420 Workstation
In reply to [email protected]https://bugzilla.kernel.org/show_bug.cgi?id=197875
Theodore Tso ([email protected]) changed:
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