Date: Sat, 15 Jul 2006 13:45:47 -0600 (MDT) From: "M. Warner Losh" <imp@bsdimp.com> To: mykola.stryebkov@gmail.com Cc: hackers@FreeBSD.ORG, corecode@fs.ei.tum.de Subject: Re: fork inside ip_input Message-ID: <20060715.134547.1159135432.imp@bsdimp.com> In-Reply-To: <20060714143514.GA2838@taran.infoua.com.ua> References: <20060714134953.GA2404@taran.infoua.com.ua> <44B7A2C8.7050407@fs.ei.tum.de> <20060714143514.GA2838@taran.infoua.com.ua>
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In message: <20060714143514.GA2838@taran.infoua.com.ua>
mykola.stryebkov@gmail.com writes:
: On 14.07.2006 15:57:28, Simon 'corecode' Schubert wrote:
: > Mykola Stryebkov wrote:
: > >Hi all.
: > >
: > >Have a strange question: is it possible to create new process (using
: > >fork or fork1) from inside of ip_input()?
: >
: > i don't think so.
: >
: > >In kernel sources i found example of using fork1 in init_main.c but
: > >looking into ip_input.c i do not understand where i can get pointers to
: > >a thread and parent process to pass it into fork1.
: >
: > only a process can fork, but ip_input is run from interrupt, not in a
: > process context. which process do you want to fork anyways?
:
: I want to start user-level process on first incoming RTP packet to
: install and keep TCP control connection.
Why not start it at boot, and signal/kick it somehow when RTP
connections need to be managed...
warner
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