Date: Thu, 7 Nov 2002 10:40:53 +0000 (GMT) From: Gavin Atkinson <gavin@ury.york.ac.uk> To: David Xu <davidxu@FreeBSD.ORG> Cc: <cvs-committers@FreeBSD.ORG>, <cvs-all@FreeBSD.ORG> Subject: Re: cvs commit: src/sys/i386/i386 exception.s genassym.c trap.c vm86.c vm86bios.s src/sys/i386/include pcb.h vm86.h Message-ID: <Pine.BSF.4.33.0211071038010.8645-100000@ury.york.ac.uk> In-Reply-To: <200211070134.gA71YNn0045906@repoman.freebsd.org>
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On Wed, 6 Nov 2002, David Xu wrote: > Log: > 1.Fix smp race between kernel vm86 BIOS calling and userland vm86 mode code, > remove global variable in_vm86call, set vm86 calling flag in PCB flags. > > 2.Fix vm86 BIOS calling preempted problem by changing vm86_lock mutex type > from MTX_DEF to MTX_SPIN. vm86pcb is not remembered in thread struct, > when the thread calling vm86 BIOS is preempted by interrupt thread, > and later switching back to the thread would cause incorrect context be > loaded into CPU registers, this leads to kernel crash. Thankyou! Thankyou! Which of your patches did you go for in the end? I have been using http://people.freebsd.org/~davidxu/vm86.diff for over a month without problem. Gavin To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe cvs-all" in the body of the message
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