[LTP] [PATCH v3] pty04: Retry reads when short and wait longer

[Jan Stancek]

----- Original Message -----
> Even though reads are blocking and packets are flipped into the netdevice
> buffer whole, it seems read may return before a full packet is read into user
> land. Retrying read should prevent timeouts and read failures on some
> machines.
> 
> Also this increases the timeout to wait for the checkpoint to a large value
> because sometimes the kernel stalls, possibly while trying to (re)claim
> memory, and this causes the checkpoint wait to timeout and everything to be
> cleaned up. If the kernel is left in a stalled state, this can result in a
> stack trace which is more useful.
> 
> Signed-off-by: Richard Palethorpe <rpalethorpe@suse.com>
> Reported-by: Jan Stancek <jstancek@redhat.com>
> Cc: Petr Vorel <pvorel@suse.cz>
> ---
> 
> V3:
> * Increase the timeout on the wait for the reason described above
> * Add some more info to read and write results

Looks good to me as well, ack.