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Bug 236624 - dm-mirror: Call to rh_in_sync should be allowed to block in do_reads
dm-mirror: Call to rh_in_sync should be allowed to block in do_reads
Product: Red Hat Enterprise Linux 5
Classification: Red Hat
Component: kernel (Show other bugs)
All Linux
medium Severity medium
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Assigned To: Jonathan Earl Brassow
Martin Jenner
Depends On:
Blocks: 236626
  Show dependency treegraph
Reported: 2007-04-16 16:00 EDT by Jonathan Earl Brassow
Modified: 2007-11-30 17:07 EST (History)
2 users (show)

See Also:
Fixed In Version: RHBA-2007-0959
Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of:
Last Closed: 2007-11-07 14:46:50 EST
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Regression: ---
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Documentation: ---
Verified Versions:
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oVirt Team: ---
RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: ---

Attachments (Terms of Use)

External Trackers
Tracker ID Priority Status Summary Last Updated
Red Hat Product Errata RHBA-2007:0959 normal SHIPPED_LIVE Updated kernel packages for Red Hat Enterprise Linux 5 Update 1 2007-11-07 19:47:37 EST

  None (edit)
Description Jonathan Earl Brassow 2007-04-16 16:00:57 EDT
When checking the sync status of a region, there are times when we must not
block.  Like when we are attempting to map I/O for the first time or in a
context that must not block.

do_reads operates in a separate kernel thread and should be allowed to block. 
[Disallowing it to do so means cluster mirroring can never read-balance, among
other things.]
Comment 1 Rob Kenna 2007-04-16 17:00:20 EDT
pm-ack for 4.6
Comment 2 Rob Kenna 2007-04-16 17:08:41 EDT
pm-ack for 5.1 (reset flag to ? waiting for 3 acks.)
Comment 3 Jonathan Earl Brassow 2007-05-08 14:30:29 EDT
assigned -> post
Comment 4 RHEL Product and Program Management 2007-05-08 14:41:52 EDT
This request was evaluated by Red Hat Kernel Team for inclusion in a Red
Hat Enterprise Linux maintenance release, and has moved to bugzilla 
status POST.
Comment 5 Don Zickus 2007-06-15 20:33:36 EDT
in 2.6.18-27.el5
You can download this test kernel from http://people.redhat.com/dzickus/el5
Comment 8 errata-xmlrpc 2007-11-07 14:46:50 EST
An advisory has been issued which should help the problem
described in this bug report. This report is therefore being
closed with a resolution of ERRATA. For more information
on the solution and/or where to find the updated files,
please follow the link below. You may reopen this bug report
if the solution does not work for you.


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