> However, reading from /proc/apm triggers BIOS calls which involve > certain action, maybe switching to Real Mode and other things, and I > suspect that either IRQs are still disabled while the BIOS is called or > the BIOS plays bad games which Linux would have to compensate for. :-/ Looking at the one laptop with this problem I could acquire access to it seems that the box switches to SMM mode with interrupts disabled for several timer ticks. During this time the i2c bus is active and it appears to be having a slow polled conversation with the battery or something attached to the battery and monitoring it. Doing while { true } do cat /proc/apm done made the box visibly stall and jerk doing X operations - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] Please read the FAQ at http://www.tux.org/lkml/
- Re: Linux 2.2.19pre3 Petri Kaukasoina
- Re: Linux 2.2.19pre3 Willy Tarreau
- Re: Linux 2.2.19pre3 Matthias Andree
- Re: Linux 2.2.19pre3 Alan Cox
- Re: Linux 2.2.19pre3 Matthias Andree
- Re: Linux 2.2.19pre3 Alan Cox
- Linux 2.2.18: /proc/apm slows system tim... Matthias Andree
- Re: Linux 2.2.18: /proc/apm slows s... Matthias Andree
- Re: Linux 2.2.18: /proc/apm slows s... Erik Mouw
- Re: Linux 2.2.18: /proc/apm slo... Matthias Andree
- Re: Linux 2.2.18: /proc/apm slo... Alan Cox
- Re: Linux 2.2.18: /proc/apm slo... Erik Mouw
- Re: Linux 2.2.18: /proc/apm slo... Alan Cox
- Re: Linux 2.2.18: /proc/apm slo... Matthias Andree
- Re: Linux 2.2.18: /proc/apm slo... Matthias Andree
- Re: Linux 2.2.18: /proc/apm slo... Alan Cox
- Re: Linux 2.2.18: /proc/apm slo... Erik Mouw
- Re: Linux 2.2.18: /proc/apm slo... Alan Cox
- Re: Linux 2.2.18: /proc/apm slo... Matthias Andree
- Re: Linux 2.2.18: /proc/apm slo... Alan Cox
- Re: Linux 2.2.18: /proc/apm slo... Matthias Andree