Bug 928317 - [RFE] [vdsm] Avoid dangerouos LVM ops on HSM using specific locking type
Summary: [RFE] [vdsm] Avoid dangerouos LVM ops on HSM using specific locking type
Keywords:
Status: CLOSED WONTFIX
Alias: None
Product: vdsm
Classification: oVirt
Component: RFEs
Version: ---
Hardware: x86_64
OS: Linux
unspecified
high
Target Milestone: ---
: ---
Assignee: Nobody
QA Contact: Aharon Canan
URL:
Whiteboard:
Depends On: 1080372 1185830
Blocks:
TreeView+ depends on / blocked
 
Reported: 2013-03-27 11:51 UTC by Haim
Modified: 2017-06-20 13:19 UTC (History)
9 users (show)

Fixed In Version:
Doc Type: Enhancement
Doc Text:
Clone Of:
Environment:
Last Closed: 2016-07-13 14:48:08 UTC
oVirt Team: Storage
Embargoed:
amureini: needinfo-
amureini: needinfo-
ylavi: ovirt-future?
rule-engine: planning_ack?
rule-engine: devel_ack?
rule-engine: testing_ack?


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System ID Private Priority Status Summary Last Updated
oVirt gerrit 11695 0 None None None Never

Description Haim 2013-03-27 11:51:06 UTC
Description of problem:

The following implementation might add significant value when working when using LVM for both HSM and SPM hosts. 

current pains: 

- lvm process is stuck in kernel - if certain lvm operation stuck (even read-only one), other lvm commands can't run and enter queue, since one of the lvm commands are stuck in kernel, it can only gets release using reboot, with this configuration, other lvm commands can still run, and host will not gets stuck. 

- HSM host tries to right to metadata - by design, hsm host should not write to metadata, we seen several cases where HSM hosts does change metadata, and altough we are in the process of clearing all cases, such configuration may save us from the first place. 

locking type = 4: 

Type 4 enforces read-only metadata and forbids any operations that might want to modify Volume Group metadata.

Comment 1 Itamar Heim 2013-12-01 19:12:12 UTC
patch is from February, haven't been touched since may.
is this still slated for 3.4?

Comment 2 Ayal Baron 2013-12-01 19:42:33 UTC
(In reply to Itamar Heim from comment #1)
> patch is from February, haven't been touched since may.
> is this still slated for 3.4?

Not clear.

Comment 3 Ayal Baron 2013-12-18 09:29:14 UTC
Yeela, any update on this?

Comment 7 Yaniv Lavi 2016-07-13 14:48:08 UTC
Please reopen if still relevant.


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