RHEL Engineering is moving the tracking of its product development work on RHEL 6 through RHEL 9 to Red Hat Jira (issues.redhat.com). If you're a Red Hat customer, please continue to file support cases via the Red Hat customer portal. If you're not, please head to the "RHEL project" in Red Hat Jira and file new tickets here. Individual Bugzilla bugs in the statuses "NEW", "ASSIGNED", and "POST" are being migrated throughout September 2023. Bugs of Red Hat partners with an assigned Engineering Partner Manager (EPM) are migrated in late September as per pre-agreed dates. Bugs against components "kernel", "kernel-rt", and "kpatch" are only migrated if still in "NEW" or "ASSIGNED". If you cannot log in to RH Jira, please consult article #7032570. That failing, please send an e-mail to the RH Jira admins at rh-issues@redhat.com to troubleshoot your issue as a user management inquiry. The email creates a ServiceNow ticket with Red Hat. Individual Bugzilla bugs that are migrated will be moved to status "CLOSED", resolution "MIGRATED", and set with "MigratedToJIRA" in "Keywords". The link to the successor Jira issue will be found under "Links", have a little "two-footprint" icon next to it, and direct you to the "RHEL project" in Red Hat Jira (issue links are of type "https://issues.redhat.com/browse/RHEL-XXXX", where "X" is a digit). This same link will be available in a blue banner at the top of the page informing you that that bug has been migrated.
Bug 595356 - run time went by but blktrace is still running
Summary: run time went by but blktrace is still running
Keywords:
Status: CLOSED ERRATA
Alias: None
Product: Red Hat Enterprise Linux 6
Classification: Red Hat
Component: blktrace
Version: 6.0
Hardware: All
OS: Linux
low
medium
Target Milestone: rc
: ---
Assignee: Edward Shishkin
QA Contact: Milos Malik
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2010-05-24 12:55 UTC by Milos Malik
Modified: 2014-01-27 11:02 UTC (History)
3 users (show)

Fixed In Version: blktrace-1.0.1-4.el6
Doc Type: Bug Fix
Doc Text:
Clone Of:
Environment:
Last Closed: 2011-05-19 14:10:24 UTC
Target Upstream Version:
Embargoed:

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHBA-2011:0718 0 normal SHIPPED_LIVE blktrace bug fix update 2011-05-18 18:09:42 UTC

Description Milos Malik 2010-05-24 12:55:27 UTC 
Reproducible:
always

Version-Release number of selected component (if applicable):
RHEL6.0-20100523.0
blktrace-1.0.1-3.1.el6.x86_64
kernel-2.6.32-28.el6.x86_64

Steps to Reproduce: 
# blktrace -d /dev/sda -w 30
=== sda ===
  CPU  0:                   17 events,        1 KiB data
  CPU  1:                    1 events,        1 KiB data
  CPU  2:                   84 events,        4 KiB data
  CPU  3:                  255 events,       12 KiB data
  Total:                   357 events (dropped 0),       17 KiB data
# ls -l *.blktrace.*
-rw-r--r--. 1 root root   818 May 24 08:13 sda.blktrace.0
-rw-r--r--. 1 root root    68 May 24 08:13 sda.blktrace.1
-rw-r--r--. 1 root root  4073 May 24 08:13 sda.blktrace.2
-rw-r--r--. 1 root root 12272 May 24 08:13 sda.blktrace.3
# rm -f sda.blktrace.0
# mkdir sda.blktrace.0
# blktrace -d /dev/sda -w 30
Open output file ./sda.blktrace.0 failed: 21/Is a directory
FAILED to start thread on CPU 0: 1/Operation not permitted

Actual results: 
blktrace does not end after 30 seconds, it will be running until you kill it

Expected results:
blktrace terminates either immediately (because of the error message) or after 30 seconds (because of the run time option)
Comment 1 Milos Malik 2010-05-24 13:04:25 UTC 
The command sequence is very similar to https://bugzilla.redhat.com/show_bug.cgi?id=498489 , which is related to RHEL-5, but the result is different this time.
Comment 2 Edward Shishkin 2010-07-08 13:32:36 UTC 
The bug:
---
If open_ios() fails, then tracer_wait_unblock() in the
thread_main() waits for event, wich will never occur:
in the case of unsuccess tracers are not unblocked.

Fixup:
---
Make sure unblock_tracers() is also called in the case on
unsuccess (when nthreads_running != ncpus).

The patch has been sent to upstream:
http://marc.info/?l=linux-btrace&m=127859567318806&w=2
Comment 3 Ric Wheeler 2010-07-16 13:41:24 UTC 
Edward, looks like this fix is ready to pull. Can you bring this into an updated build?
Comment 4 Edward Shishkin 2010-07-16 22:54:44 UTC 
Ok, I need permissions then?
Comment 5 Ric Wheeler 2010-07-17 02:52:14 UTC 
Milos, can you justify this as a blocker (i.e., would you hold up the RHEL6.0 release for this specific fix?), or should be move this back to 6.1?

Thanks!
Comment 6 Milos Malik 2010-07-19 07:52:00 UTC 
I have no problem with moving this fix to RHEL-6.1. Nobody else encountered this bug.
Comment 7 Eric Sandeen 2010-10-29 21:35:57 UTC 
Sending blktrace bugs over to Edward, as he did the upstream work for them.
Comment 8 Eric Sandeen 2011-01-10 20:47:00 UTC 
Changes were committed & built in blktrace-1.0.1-4.el6
Comment 11 errata-xmlrpc 2011-05-19 14:10:24 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/RHBA-2011-0718.html
Note You need to log in before you can comment on or make changes to this bug.