Bug 599739 - PG_error bit is never cleared, even when a fresh I/O to the page succeeds [rhel-5.5.z]
Summary: PG_error bit is never cleared, even when a fresh I/O to the page succeeds [rh...
Keywords:
Status: CLOSED ERRATA
Alias: None
Product: Red Hat Enterprise Linux 5
Classification: Red Hat
Component: kernel
Version: 5.6
Hardware: All
OS: Linux
urgent
high
Target Milestone: rc
: ---
Assignee: Jiri Pirko
QA Contact: Red Hat Kernel QE team
URL:
Whiteboard:
Depends On: 590763
Blocks:
TreeView+ depends on / blocked
 
Reported: 2010-06-03 20:00 UTC by RHEL Program Management
Modified: 2015-05-05 01:20 UTC (History)
16 users (show)

Fixed In Version:
Doc Type: Bug Fix
Doc Text:
Input/output errors can occur due to temporary failures, such as multipath errors or losing network contact with an iSCSI server. In these cases, virtual memory attempts to retry the readpage() function on the memory page. However, the do_generic_file_read() function did not clear PG_error, which resulted in the system being unable to use the data in the page cache page, even if subsequent readpage() calls succeeded. With this update, the do_generic_file_read() function properly clears PG_error so that the page cache can be utilized in the case of input/output errors.
Clone Of:
Environment:
Last Closed: 2010-07-01 18:28:45 UTC
Target Upstream Version:
Embargoed:
eguan: needinfo-

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2010:0504 0 normal SHIPPED_LIVE Important: kernel security and bug fix update 2010-07-01 18:26:58 UTC

Description RHEL Program Management 2010-06-03 20:00:45 UTC 
This bug has been copied from bug #590763 and has been proposed
to be backported to 5.5 z-stream (EUS).
Comment 3 Jiri Pirko 2010-06-07 13:30:47 UTC 
in 2.6.18-194.6.1.el5
Comment 10 Douglas Silas 2010-06-28 20:47:38 UTC 
Technical note added. If any revisions are required, please edit the "Technical Notes" field
accordingly. All revisions will be proofread by the Engineering Content Services team.

New Contents:
Input/output errors can occur due to temporary failures, such as multipath errors or losing network contact with an iSCSI server. In these cases, virtual memory attempts to retry the readpage() function on the memory page. However, the do_generic_file_read() function did not clear PG_error, which resulted in the system being unable to use the data in the page cache page, even if subsequent readpage() calls succeeded. With this update, the do_generic_file_read() function properly clears PG_error so that the page cache can be utilized in the case of input/output errors.
Comment 12 errata-xmlrpc 2010-07-01 18:28:45 UTC 
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 therefore 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/RHSA-2010-0504.html
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