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101f12af16
linux/arch/i386/kernel
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Jan Beulich 101f12af16 [PATCH] i386: actively synchronize vmalloc area when registering certain callbacks 
Registering a callback handler through register_die_notifier() is obviously
primarily intended for use by modules.  However, the way these currently
get called it is basically impossible for them to actually be used by
modules, as there is, on non-PAE configurationes, a good chance (the larger
the module, the better) for the system to crash as a result.

This is because the callback gets invoked

(a) in the page fault path before the top level page table propagation
    gets carried out (hence a fault to propagate the top level page table
    entry/entries mapping to module's code/data would nest infinitly) and

(b) in the NMI path, where nested faults must absolutely not happen,
    since otherwise the IRET from the nested fault re-enables NMIs,
    potentially resulting in nested NMI occurences.

Besides the modular aspect, similar problems would even arise for in-
kernel consumers of the API if they touched ioremap()ed or vmalloc()ed
memory inside their handlers.

Signed-off-by: Jan Beulich <jbeulich@novell.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-03-23 07:38:05 -08:00
..
acpi [PATCH] i386: port ATI timer fix from x86_64 to i386 II 2006-03-08 18:10:31 -08:00
cpu [PATCH] i386: fall back to sensible CPU model name 2006-03-23 07:38:04 -08:00
timers [PATCH] x86: mark cyc2ns_scale readmostly 2006-03-22 07:53:55 -08:00
.gitignore [PATCH] x86: gitignore some autogenerated files for i386 2006-02-14 16:09:35 -08:00
alternative.c [PATCH] x86: SMP alternatives 2006-03-23 07:38:04 -08:00
apic.c [PATCH] Plug kdump shutdown race window 2006-03-14 08:26:44 -08:00
apm.c [PATCH] capable/capability.h (arch/) 2006-01-11 18:42:14 -08:00
asm-offsets.c
bootflag.c
cpuid.c [PATCH] arch/i386/kernel/cpuid.c: unused variable 2006-01-06 08:33:38 -08:00
crash_dump.c [PATCH] kdump: read previous kernel's memory 2006-01-10 08:01:28 -08:00
crash.c [PATCH] kdump: save registers early (inline functions) 2006-01-10 08:01:27 -08:00
dmi_scan.c [PATCH] x86_64: Generalize DMI and enable for x86-64 2006-01-11 19:04:51 -08:00
doublefault.c
early_printk.c
efi_stub.S
efi.c [PATCH] efi_call_phys_epilog() warning fix 2006-03-22 07:53:55 -08:00
entry.S [PATCH] Make vm86 support optional 2006-01-08 20:14:11 -08:00
head.S [PATCH] x86: fix broken SMP boot sequence 2006-02-24 14:31:38 -08:00
i386_ksyms.c [PATCH] x86: fix broken SMP boot sequence 2006-02-24 14:31:38 -08:00
i387.c
i8237.c
i8259.c Revert "i386: move apic init in init_IRQs" 2005-10-31 19:16:17 -08:00
init_task.c [PATCH] Change maxaligned_in_smp alignemnt macros to internodealigned_in_smp macros 2006-01-08 20:13:38 -08:00
io_apic.c [PATCH] i386: port ATI timer fix from x86_64 to i386 II 2006-03-08 18:10:31 -08:00
ioport.c [PATCH] capable/capability.h (arch/) 2006-01-11 18:42:14 -08:00
irq.c [PATCH] Change maxaligned_in_smp alignemnt macros to internodealigned_in_smp macros 2006-01-08 20:13:38 -08:00
kprobes.c [PATCH] Kprobes causes NX protection fault on i686 SMP 2006-02-24 14:31:37 -08:00
ldt.c [PATCH] arch/i386/kernel/ldt.c should #include <asm/mmu_context.h> 2005-11-07 07:53:29 -08:00
machine_kexec.c [PATCH] fix kexec asm 2006-03-08 14:15:04 -08:00
Makefile [PATCH] x86: SMP alternatives 2006-03-23 07:38:04 -08:00
mca.c [PATCH] arch/i386: Use ARRAY_SIZE macro 2005-11-07 07:53:28 -08:00
microcode.c [PATCH] x86 microcode driver vs hotplug CPUs. 2006-02-28 20:53:43 -08:00
module.c [PATCH] x86: SMP alternatives 2006-03-23 07:38:04 -08:00
mpparse.c [PATCH] Compilation fix for ES7000 when no ACPI is specified in config (i386) 2006-03-23 07:38:04 -08:00
msr.c [PATCH] arch/i386/kernel/msr.c: removed unused variable 2006-01-06 08:33:38 -08:00
nmi.c [PATCH] x86: Fix i386 nmi_watchdog that does not trigger die_nmi 2006-03-08 14:14:01 -08:00
numaq.c
pci-dma.c [PATCH] gfp flags annotations - part 1 2005-10-08 15:00:57 -07:00
process.c [PATCH] i386: print kernel version in register dumps 2006-02-05 11:06:53 -08:00
ptrace.c [PATCH] i386: Don't let ptrace set the nested task bit 2006-03-23 07:38:04 -08:00
quirks.c [PATCH] EDAC: core EDAC support code 2006-01-18 19:20:31 -08:00
reboot_fixups.c [PATCH] arch/i386/kernel/reboot_fixups.c should #include <linux/reboot_fixups.h> 2005-11-07 07:53:29 -08:00
reboot.c [PATCH] i386/x86-64: Don't IPI to offline cpus on shutdown 2006-01-11 19:04:50 -08:00
relocate_kernel.S
scx200.c [PATCH] arch: Replace pci_module_init() with pci_register_driver() 2006-01-09 12:13:21 -08:00
semaphore.c [PATCH] x86: SMP alternatives 2006-03-23 07:38:04 -08:00
setup.c [PATCH] x86: early printk handling fixes 2006-03-23 07:38:05 -08:00
sigframe.h
signal.c [PATCH] i386: let signal handlers set the resume flag 2006-03-23 07:38:05 -08:00
smp.c [PATCH] on_each_cpu(): disable local interrupts 2006-03-22 07:53:59 -08:00
smpboot.c [PATCH] x86: SMP alternatives 2006-03-23 07:38:04 -08:00
srat.c [PATCH] x86_64: Make i386 compile again with fourth DMA32 zone 2005-11-14 19:55:13 -08:00
summit.c
sys_i386.c [PATCH] Uninline sys_mmap common code (reduce binary size) 2006-03-22 07:54:02 -08:00
syscall_table.S [PATCH] fstatat64 support 2006-02-11 21:41:10 -08:00
sysenter.c
time_hpet.c [PATCH] move rtc_interrupt() prototype to rtc.h 2006-01-08 20:13:47 -08:00
time.c [PATCH] x86: fix potential jiffies overflow in timer_resume() 2006-03-06 18:40:44 -08:00
topology.c [PATCH] Fix topology.c location 2006-02-24 14:31:39 -08:00
trampoline.S
traps.c [PATCH] i386: actively synchronize vmalloc area when registering certain callbacks 2006-03-23 07:38:05 -08:00
vm86.c correct email address of Manfred Spraul 2006-01-15 02:43:54 +01:00
vmlinux.lds.S [PATCH] x86: SMP alternatives 2006-03-23 07:38:04 -08:00
vsyscall-int80.S
vsyscall-note.S
vsyscall-sigreturn.S
vsyscall-sysenter.S [PATCH] x86: document sysenter path 2006-02-14 16:09:35 -08:00
vsyscall.lds.S
vsyscall.S