[Xen-devel] PATCH: improve robustness of xenconsoled logfile handling

["Daniel P. Berrange" <berrange@xxxxxxxxxx>]

Attached is an small patch to xenconsoled to make the persistent logging
code I previously added a little more robust. First change is to check 
the 'log_reload' on every iteration of the select() loop, not just when
select() returns EINTR. This is because the log reload signal may have
iterrupted a syscall other than select & thus without this change  we
might miss the reload signal.  The second change makes us process the
hypervisor logs on every iteration of the loop, not just upon timeouts.
This is because if a guest VM were consistently sending some log message
and < 1 second period, the select() would never hit the 1 second timeout
and thus never process the HV logs. 

Thanks to Markus Armbruster for pointing out both these edge cases

   Signed-off-by: Daniel P. Berrange <berrange@xxxxxxxxxx>


 io.c |   30 +++++++++++++++++++-----------
 1 file changed, 19 insertions(+), 11 deletions(-)


Regards,
Dan.
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Attachment: xen-console-log-paranoia.patch
Description: Text document

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