Date: Thu, 28 Jan 2010 17:16:08 +0300 From: cronfy <cronfy@gmail.com> To: freebsd-hackers@freebsd.org Subject: Re: Unique process id (not pid) and accounting daemon Message-ID: <d4ac64921001280616h7827d0ffoa78d21d545dbc012@mail.gmail.com> In-Reply-To: <20100125035448.GW71374@elvis.mu.org> References: <d4ac64921001241533j375705f2we97945d010a1a7ff@mail.gmail.com> <20100125035448.GW71374@elvis.mu.org>
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>> To ensure that process in the process tree and process in the >> accounting file are the same, I want to add unique process identifier >> (uint64_t) to 'proc' struct in sys/sys/proc.h and increment it for >> every process fork. I see it is possible to do this just before >> sx_sunlock() in fork1() in sys/kern/kern_fork.c. > Now that I know this, I would suggest simply recording the start > time as the serial number, then using pid+recorded_start_time as > your serial number. This may lead to duplicate ids: pid may be reused and time may be shifted to give exactly the same start_time as it was used with this pid earlier. Simple increment will work fine. Ok, as far as no one else commented at my idea, I assume it is not completely stupid and will try to implement this :) -- // cronfy
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