RE: sys/i386/i386/machdep.c:cpu_idle() changes causes this Was:
On 22-Oct-00 [EMAIL PROTECTED] wrote: >> >> On 20-Oct-00 Valentin Chopov wrote: >> > I found that if I remove #ifndef SMP /#endif in: >> >> Errr, this doesn't really make sense, and if anything is probably >> hiding the problem. Also, this change will potentially increase >> interrupt latency even further on SMP machines. > > Interrupts are disabled if Giant is busy in vm_page_zero_idle, thus > the idle proc calls mi_switch with interrupts disabled and the process > being scheduled starts running with interrupts disabled. > > I suggest removing the asm statement from vm_page_zero_idle as a first > stage in rewriting vm_page_zero_idle. A.. Thanks for the tip. I didn't know that vm_page_zero_idle was this evil. Yuck. In fact, vm_page_zero_idle() is no longer called with interrupts disabled, so all the interrupt foolishness can go away. -- John Baldwin <[EMAIL PROTECTED]> -- http://www.FreeBSD.org/~jhb/ PGP Key: http://www.baldwin.cx/~john/pgpkey.asc "Power Users Use the Power to Serve!" - http://www.FreeBSD.org/ To Unsubscribe: send mail to [EMAIL PROTECTED] with "unsubscribe freebsd-current" in the body of the message
RE: sys/i386/i386/machdep.c:cpu_idle() changes causes this Was:
> > On 20-Oct-00 Valentin Chopov wrote: > > I found that if I remove #ifndef SMP /#endif in: > > Errr, this doesn't really make sense, and if anything is probably > hiding the problem. Also, this change will potentially increase > interrupt latency even further on SMP machines. Interrupts are disabled if Giant is busy in vm_page_zero_idle, thus the idle proc calls mi_switch with interrupts disabled and the process being scheduled starts running with interrupts disabled. I suggest removing the asm statement from vm_page_zero_idle as a first stage in rewriting vm_page_zero_idle. - Tor Egge To Unsubscribe: send mail to [EMAIL PROTECTED] with "unsubscribe freebsd-current" in the body of the message
RE: sys/i386/i386/machdep.c:cpu_idle() changes causes this Was:
At 01:21 PM 10/20/2000 -0700, John Baldwin wrote: >On 20-Oct-00 Valentin Chopov wrote: >> I found that if I remove #ifndef SMP /#endif in: > >Errr, this doesn't really make sense, and if anything is probably >hiding the problem. Also, this change will potentially increase >interrupt latency even further on SMP machines. > >-- John Do you have any idea what's causing this ? Oct 20 21:20:36 pozo last message repeated 17 times Oct 20 21:30:00 pozo last message repeated 4 times Oct 20 21:30:00 pozo last message repeated 4 times Oct 20 21:41:26 pozo last message repeated 9 times Oct 20 21:41:26 pozo last message repeated 9 times Oct 20 21:50:01 pozo last message repeated 13 times Oct 20 21:50:01 pozo last message repeated 13 times #dmesg kernel trap 12 with interrupts disabled kernel trap 12 with interrupts disabled kernel trap 12 with interrupts disabled kernel trap 12 with interrupts disabled kernel trap 12 with interrupts disabled kernel trap 12 with interrupts disabled kernel trap 12 with interrupts disabled kernel trap 12 with interrupts disabled kernel trap 12 with interrupts disabled kernel trap 12 with interrupts disabled kernel trap 12 with interrupts disabled kernel trap 12 with interrupts disabled kernel trap 12 with interrupts disabled kernel trap 12 with interrupts disabled kernel trap 12 with interrupts disabled kernel trap 12 with interrupts disabled this is a very truncated version there are probably 301 messages like this in a SMP machine that has only been up about 4 hours with very little activity , just a few cvsups and mail. If I build a kernel then the messages really increase. If there is any thing I can do Thanks Manfred == || [EMAIL PROTECTED] || || Ph. (415) 681-6235 || == To Unsubscribe: send mail to [EMAIL PROTECTED] with "unsubscribe freebsd-current" in the body of the message
RE: sys/i386/i386/machdep.c:cpu_idle() changes causes this Was:
On 20-Oct-00 Valentin Chopov wrote: > I found that if I remove #ifndef SMP /#endif in: Errr, this doesn't really make sense, and if anything is probably hiding the problem. Also, this change will potentially increase interrupt latency even further on SMP machines. -- John Baldwin <[EMAIL PROTECTED]> -- http://www.FreeBSD.org/~jhb/ PGP Key: http://www.baldwin.cx/~john/pgpkey.asc "Power Users Use the Power to Serve!" - http://www.FreeBSD.org/ To Unsubscribe: send mail to [EMAIL PROTECTED] with "unsubscribe freebsd-current" in the body of the message
