ports/sysutils/diskcheckd (Re: bad sector in gmirror HDD)

Chris Rees utisoft at gmail.com
Wed Aug 31 11:44:27 UTC 2011

On 25 August 2011 18:54, Chris Rees <utisoft at gmail.com> wrote:
> On 24 August 2011 16:14,  <perryh at pluto.rain.com> wrote:
>>> When the specified or calculated rate exceeds 64KB/sec, the
>>> required sleep interval between 64KB chunks is less than one
>>> second.  Since diskcheckd calculates the interval in whole seconds
>>> -- because it calls sleep() rather than usleep() or nanosleep()
>>> -- an interval of less than one second is calculated as zero ...
>>> I suspect the fix will be to calculate in microseconds, and call
>>> usleep() instead of sleep().
>> I think I may have this fixed.
>> Could one of you try the attached patch?  I'm especially interested
>> to see if this also clears up the issues reported as connected with
>> gmirror (http://www.freebsd.org/cgi/query-pr.cgi?pr=ports/143566),
>> since I haven't been able to reproduce that part here.
>> Summary of changes:
>> * Calculate delays in microseconds, so that delays of less than
>>  one second between reads (needed to implement rates exceeding
>>  64KB/sec) do not get rounded down to zero.
>> * Fix a reinitialization problem when handling SIGHUP.
>> * Additional debug messages (only with -d).
>> * Comment and manpage improvememts.
> Hi Perry,
> The changes look good, so if there's no response for a few days I'll
> commit the changes.
> Thanks for rescuing the port :)

Committed. Thanks!

Chris Rees          | FreeBSD Developer
crees at FreeBSD.org   | http://people.freebsd.org/~crees

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