linux/arch/i386
Ravikiran G Thirumalai 92715e282b [PATCH] x86: Fix boot hang due to nmi watchdog init code
2.6.19  stopped booting (or booted based on build/config) on our x86_64
systems due to a bug introduced in 2.6.19.  check_nmi_watchdog schedules an
IPI on all cpus to  busy wait on a flag, but fails to set the busywait
flag if NMI functionality is disabled.  This causes the secondary cpus
to spin in an endless loop, causing the kernel bootup to hang.
Depending upon the build, the  busywait flag got overwritten (stack variable)
and caused  the kernel to bootup on certain builds.  Following patch fixes
the bug by setting the busywait flag before returning from check_nmi_watchdog.
I guess using a stack variable is not good here as the calling function could
potentially return while the busy wait loop is still spinning on the flag.

AK: I redid the patch significantly to be cleaner

Signed-off-by: Ravikiran Thirumalai <kiran@scalex86.org>
Signed-off-by: Shai Fultheim <shai@scalex86.org>
Signed-off-by: Andi Kleen <ak@suse.de>
2006-12-09 21:33:35 +01:00
..
boot [PATCH] x86-64: Fix numaq build error 2006-12-07 02:14:13 +01:00
crypto [CRYPTO] api: Get rid of flags argument to setkey 2006-09-21 11:41:02 +10:00
kernel [PATCH] x86: Fix boot hang due to nmi watchdog init code 2006-12-09 21:33:35 +01:00
lib [PATCH] separate bdi congestion functions from queue congestion functions 2006-10-20 10:26:35 -07:00
mach-default [PATCH] irq-flags: i386: Use the new IRQF_ constants 2006-07-02 13:58:47 -07:00
mach-es7000 [PATCH] Compilation fix for ES7000 when no ACPI is specified in config (i386) 2006-03-23 07:38:04 -08:00
mach-generic [PATCH] i386: Avoid boot warning with apic=debug 2006-12-07 02:14:11 +01:00
mach-visws [PATCH] visws: sgivwfb as module needs exports 2006-12-08 08:29:07 -08:00
mach-voyager [PATCH] i386: replace kmalloc+memset with kzalloc 2006-12-07 02:14:19 +01:00
math-emu [PATCH] i386: fix must_checks 2006-12-07 02:14:00 +01:00
mm Merge branch 'for-linus' of git://one.firstfloor.org/home/andi/git/linux-2.6 2006-12-07 08:59:11 -08:00
oprofile [PATCH] oprofile: ppro: need to enable/disable all the counters 2006-09-29 09:18:11 -07:00
pci [PATCH] x86: add write_pci_config_byte() to direct PCI access routines 2006-12-07 02:14:10 +01:00
power Merge branch 'for-linus' of git://one.firstfloor.org/home/andi/git/linux-2.6 2006-12-07 08:59:11 -08:00
defconfig [PATCH] i386: Update defconfig 2006-12-09 21:33:35 +01:00
Kconfig [PATCH] Generic BUG for i386 2006-12-08 08:28:39 -08:00
Kconfig.cpu [PATCH] LOG2: Implement a general integer log2 facility in the kernel 2006-12-08 08:28:51 -08:00
Kconfig.debug [PATCH] paravirt: Patch inline replacements for paravirt intercepts 2006-12-07 02:14:08 +01:00
Makefile [PATCH] i386: always enable regparm 2006-12-07 02:14:12 +01:00
Makefile.cpu [PATCH] i386: Add support for compilation for Core2 2006-12-07 02:14:09 +01:00