On 09/14/2015 07:30 PM, Hiraku Toyooka wrote:
Hello Mark, Thank you for your advise. >> +prlog -n "Checking pmsg file contains TEST_STRING ... " > Mark this as 'wish to have' OK. I'll change it to "Checking pmsg file wishes to have TEST_STRING ... ". Should I change other messages in the same way?
I was referring to the list of enhancements to the testing (below), not the message in the logs ;-}
Sorry for taking so long to respond, got preoccupied ...
> Can TEST_STRING be given an unique value each run, so that on the the > reboot-comparison run it can be found to be an unique match? Yes. I'll append /proc/sys/kernel/random/uuid content to TEST_STRING. I'll also change log directory name from date to the uuid.
Cool
> Also confirm that any previous content (which may be binary) is not > present after reboot, and that totally new content is present. OK. As for pmsg, they are possible by checking if the /sys/fs/pstore/pmsg content perfectly matches the TEST_STRING which was written to /dev/pmsg before reboot. (The TEST_STRING can be left to a regular file before reboot as well as reboot_flag.) Is it OK?
Perfectly match is an issue, since something else might be using pmsg. For instance, one of the applications that uses this interface packetizes the messages so they can be picked out from other sources that do not comply with the header (count, magic number etc). In this case, should that daemon be active, your content would be ignores, but your content would also be buried, but can be needled out with grep.
What you should do is grep for your string pattern within some acceptable regex, and one should be found and no other, and it should match perfectly. This would prevent another daemon's content from disrupting your test and causing a false negative.
Best regards, Hiraku Toyooka
Sincerely -- Mark Salyzyn -- To unsubscribe from this list: send the line "unsubscribe linux-api" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
