Date: Thu, 31 Jul 2003 13:59:42 -0400 (EDT) From: John Baldwin <jhb@FreeBSD.org> To: Bruce Evans <bde@zeta.org.au> Cc: cvs-all@FreeBSD.org Subject: Re: cvs commit: src/sys/kern subr_trap.c Message-ID: <XFMail.20030731135942.jhb@FreeBSD.org> In-Reply-To: <20030731170953.U5558@gamplex.bde.org>
next in thread | previous in thread | raw e-mail | index | archive | help
On 31-Jul-2003 Bruce Evans wrote: > On Wed, 30 Jul 2003, Peter Wemm wrote: > >> peter 2003/07/30 18:36:24 PDT >> >> FreeBSD src repository >> >> Modified files: >> sys/kern subr_trap.c >> Log: >> When ktracing context switches, make sure we record involuntary switches. >> Otherwise, when we get a evicted from the cpu, there is no record of it. >> This is not a default ktrace flag. > > This seems to be missing for many other calls to mi_switch(). Perhaps > mi_switch() itself should handle it. Unfortuantely it can't since ktrace uses a mutex internally and ktrcsw() can't be called with sched_lock held. -- John Baldwin <jhb@FreeBSD.org> <>< http://www.FreeBSD.org/~jhb/ "Power Users Use the Power to Serve!" - http://www.FreeBSD.org/
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?XFMail.20030731135942.jhb>