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staging/lustre: Always clamp cdls_delay between min and max

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In libcfs_debug_vmsg2, cdls_delay is only clamped between the minimum
and the maximum when it is increased by multiplying by the backoff
factor.  It is not clamped when it is decreased by dividing by the
backoff factor.  This allows it to achieve values less than the
minimum, which allows a console message to be printed that should have
been skipped.  This patch moves the clamping outside of the else
statement, ensuring that cdls_delay is always between the min and the
max after the first time through libcfs_debug_vmsg2.

Signed-off-by: Ryan Haasken <haasken@cray.com>
Reviewed-on: http://review.whamcloud.com/9503
Intel-bug-id: https://jira.hpdd.intel.com/browse/LU-4711
Reviewed-by: Chris Horn <hornc@cray.com>
Reviewed-by: Ann Koehler <amk@cray.com>
Reviewed-by: Andreas Dilger <andreas.dilger@intel.com>
Signed-off-by: Oleg Drokin <oleg.drokin@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Ryan Haasken 2014-04-27 13:07:08 -04:00 committed by Greg Kroah-Hartman
parent beaa264726
commit b7d0254ce8
1 changed files with 5 additions and 5 deletions
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10
drivers/staging/lustre/lustre/libcfs/tracefile.c
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@ -416,13 +416,13 @@ int libcfs_debug_vmsg2(struct libcfs_debug_msg_data *msgdata,
cdls->cdls_delay /= libcfs_console_backoff * 4;
} else {
cdls->cdls_delay *= libcfs_console_backoff;
if (cdls->cdls_delay < libcfs_console_min_delay)
cdls->cdls_delay = libcfs_console_min_delay;
else if (cdls->cdls_delay > libcfs_console_max_delay)
cdls->cdls_delay = libcfs_console_max_delay;
}
if (cdls->cdls_delay < libcfs_console_min_delay)
cdls->cdls_delay = libcfs_console_min_delay;
else if (cdls->cdls_delay > libcfs_console_max_delay)
cdls->cdls_delay = libcfs_console_max_delay;
/* ensure cdls_next is never zero after it's been seen */
cdls->cdls_next = (cfs_time_current() + cdls->cdls_delay) | 1;
}