Scott Long 8611774e5e Extend critical section coverage in the low-level interrupt handlers to ... include the ithread scheduling step. Without this, a preemption might occur in between the interrupt getting masked and the ithread getting scheduled. Since the interrupt handler runs in the context of curthread, the scheudler might see it as having a such a low priority on a busy system that it doesn't get to run for a _long_ time, leaving the interrupt stranded in a disabled state. The only way that the preemption can happen is by a fast/filter handler triggering a schduling event earlier in the handler, so this problem can only happen for cases where an interrupt is being shared by both a fast/filter handler and an ithread handler. Unfortunately, it seems to be common for this sharing to happen with network and USB devices, for example. This fixes many of the mysterious TCP session timeouts and NIC watchdogs that were being reported. Many thanks to Sam Lefler for getting to the bottom of this problem. Reviewed by: jhb, jeff, silby		2007-11-21 04:03:51 +00:00
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acpica	This is a follow-up, cleaning-up commit about recent changes involving	2007-09-11 22:54:09 +00:00
bios	Apply the same sort of locking done in	2007-11-14 05:43:55 +00:00
compile
conf	Link wpi(4) into the build.	2007-11-08 22:09:37 +00:00
cpufreq	Use bus_dma to get a page in the first 4 GB. Since the physical address	2007-06-17 07:18:23 +00:00
i386	Extend critical section coverage in the low-level interrupt handlers to	2007-11-21 04:03:51 +00:00
ibcs2	Fix for the panic("vm_thread_new: kstack allocation failed") and	2007-11-05 11:36:16 +00:00
include	Drastically simplify the i386 pcpu backend by merging parts of the	2007-11-13 23:00:24 +00:00
isa	Split /dev/nvram driver out of isa/clock.c for i386 and amd64. I have not	2007-10-26 03:23:54 +00:00
linux	Fix for the panic("vm_thread_new: kstack allocation failed") and	2007-11-05 11:36:16 +00:00
pci	Make the PCI code aware of PCI domains (aka PCI segments) so we can	2007-09-30 11:05:18 +00:00
svr4	Use svr4_si_{addr,code,errno,signo,trap} in preference to si_{...}.	2005-10-19 14:59:54 +00:00
xbox	- Define data of struct gfb_font a const as it's only used to supply font	2007-06-16 21:31:53 +00:00
Makefile	Update entries for building tags.	2007-05-13 18:21:54 +00:00