Bug 236626 - 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
Status: CLOSED ERRATA
Product: Red Hat Enterprise Linux 4
Classification: Red Hat
Component: kernel (Show other bugs)
4.5
All Linux
medium Severity medium
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Assigned To: Jonathan Earl Brassow
Martin Jenner
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Depends On: 236624
Blocks:
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Reported: 2007-04-16 16:03 EDT by Jonathan Earl Brassow
Modified: 2007-11-30 17:07 EST (History)
6 users (show)

See Also:
Fixed In Version: RHBA-2007-0791
Doc Type: Bug Fix
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Last Closed: 2007-11-15 11:25:08 EST
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RHEL 7.3 requirements from Atomic Host:
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Description Jonathan Earl Brassow 2007-04-16 16:03:40 EDT
+++ This bug was initially created as a clone of Bug #236624 +++

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 16:59:44 EDT
pm-ack for 4.6
Comment 2 Jonathan Earl Brassow 2007-05-08 12:50:26 EDT
assigned -> post
Comment 4 RHEL Product and Program Management 2007-05-08 13:02:12 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 Jason Baron 2007-06-22 10:28:55 EDT
committed in stream U6 build 55.11. A test kernel with this patch is available
from http://people.redhat.com/~jbaron/rhel4/
Comment 8 errata-xmlrpc 2007-11-15 11:25:08 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.

http://rhn.redhat.com/errata/RHBA-2007-0791.html

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