Date: Tue, 4 Aug 2009 10:19:12 +0000 From: Maslan <maslanbsd@gmail.com> To: Ed Schouten <ed@80386.nl> Cc: FreeBSD Hackers <freebsd-hackers@freebsd.org> Subject: Re: sosend() and mbuf Message-ID: <319cceca0908040319x35bc8bcy7a869dd230419a50@mail.gmail.com> In-Reply-To: <319cceca0908040259q4537db80uc2ce9696f30bfc12@mail.gmail.com> References: <319cceca0908030119i3432a495ya60aa431dab0e1b1@mail.gmail.com> <86fxc84ksj.fsf@ds4.des.no> <200908040138.14743.max@love2party.net> <319cceca0908040227hf9a0f92jbf05b11e9f974994@mail.gmail.com> <20090804093036.GN1292@hoeg.nl> <319cceca0908040239k2accd7fen402db4c91687a267@mail.gmail.com> <20090804094142.GO1292@hoeg.nl> <319cceca0908040252w105d3dfdge9dec3c8b6d28607@mail.gmail.com> <20090804095650.GP1292@hoeg.nl> <319cceca0908040259q4537db80uc2ce9696f30bfc12@mail.gmail.com>
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OpenKETA has its own kthread_create() with a little modification from kthread_create(), it associates the new thread with curthread not with the thread0. See /usr/sys/kern/kern_kthread.c: kthread_create() error = fork1(&thread0, RFMEM | RFFDG | RFPROC | RFSTOPPED | flags, pages, &p2); OpenKETA:kthread_create() error = fork1(curthread, RFFDG | RFPROC | RFSTOPPED | flags, pages, &p2); I'll give it a try and see if it works. BUT i still can't understand why kern_open() don't work, except in the original thread. On Tue, Aug 4, 2009 at 9:59 AM, Maslan<maslanbsd@gmail.com> wrote: > yes kio http://people.freebsd.org/~pjd/misc/kernio/ > However, It's outdated. > > On Tue, Aug 4, 2009 at 9:56 AM, Ed Schouten<ed@80386.nl> wrote: >> * Maslan <maslanbsd@gmail.com> wrote: >>> > Is it possible to call kern_open() from within a kernel thread anyway? >>> I think yes, It worked on the parent thread before creating a new kthread. >>> See OpenKETA source, its using the same approach. >>> > kern_open() depends on a file descriptor table, right? >>> Yes, it returns a fd in the curthread->td_retval[0], which i should >>> use within the same thread to deal with this file. >> >> Didn't someone (Jeff Roberson?) develop some nice in-kernel API for >> accessing files some years ago? Why not use that? >> >> -- >> Ed Schouten <ed@80386.nl> >> WWW: http://80386.nl/ >> >
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