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Fixup for RH bugzilla 595620.
Document undocumented blktrace options.
Update the man pages.
Signed-off-by: Edward Shishkin <edward@redhat.com>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
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Fixup for RH bugzilla 595419.
Document blkiomon option -d (--dump-lldd).
Add drv_data mask description to blktrace man page.
Signed-off-by: Edward Shishkin <edward@redhat.com>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
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Document that "-o" does not work when specyfing multiple devices to
blktrace, also: enforce this by stopping blktrace when one tries do
do this.
The technical reason why "-o" doesn't work with multiple devices is
because we use multiple threads of execution - one per device/CPU pair -
and each of them opens a file named "<prefix>.blktrace.<cpu>". With the
"-o" all of the "<prefix>" values are the same - so multiple threads
open the same file and try to do output. Not good. Without the "-o"
we get unique files named: "<device>.blktrace.<cpu>" - as the tuple
(<device>,<cpu>) is unique.
Signed-off-by: Alan D. Brunelle <Alan.Brunelle@hp.com>
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Fixup for 513950.
Problem:
'blktrace -d <device> -k' does not kill a running
backgound trace. Executing 'blktrace -d <device> -k'
for the second time results in "BLKTRACETEARDOWN:
Invalid argument" message and then each run of
blktrace on that machine prints the following output:
BLKTRACESETUP: No such file or directory.
The bug:
The option -k results in clobbering information
about running trace by kernel (blk_trace_remove),
while resources (files open in debugfs by the running
background blktrace) are not released.
Solution:
Update documentation:
Undocument the non-working "kill" option. Advise
to send SIGINT signall via kill(1) to the running
background blktrace for its correct termination.
Signed-off-by: Edward Shishkin <edward@redhat.com>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
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Fix small typo as reported by Kent Baxley <kbaxley@redhat.com>
in Red Hat Bug 489941 - tiny typo in blktrace manpage
Signed-off-by: Eric Sandeen <sandeen@redhat.com>
Signed-off-by: Jens Axboe <axboe@carl.(none)>
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Allow masking in messages by using "-a notify".
Signed-off-by: Carl Henrik Lunde <chlunde@ping.uio.no>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
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This fixes up a formatting problem when displaying the blktrace
man pages - just a typo (bold mode not correctly terminated, so
it flows on until the next bold-mode-termination a few lines on).
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
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Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
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Fix minor indentation typo in blktrace man page.
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
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Thanks to Bas Zoetekouw <bas@debian.org> for providing these! And
shame on me for forgetting to add them to the git repo.
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
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