Date: Thu, 07 Nov 2002 10:07:55 -0500 From: "Brian F. Feldman" <green@FreeBSD.org> 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: <200211071507.gA7F7tQO051899@green.bikeshed.org> In-Reply-To: Your message of "Wed, 06 Nov 2002 17:34:23 PST." <200211070134.gA71YNn0045906@repoman.freebsd.org>
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David Xu <davidxu@FreeBSD.org> wrote: > davidxu 2002/11/06 17:34:23 PST > > Modified files: > sys/i386/i386 exception.s genassym.c trap.c vm86.c > vm86bios.s > sys/i386/include pcb.h vm86.h > 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. Will this fix my execution of doscmd on my SMP machine, perhaps? -- Brian Fundakowski Feldman \'[ FreeBSD ]''''''''''\ <> green@FreeBSD.org <> bfeldman@tislabs.com \ The Power to Serve! \ Opinions expressed are my own. \,,,,,,,,,,,,,,,,,,,,,,\ To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe cvs-all" in the body of the message
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