You can not select more than 25 topics Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.

Maksim Rayskiy 5c20019713 MIPS: ASID conflict after CPU hotplug ... I am running SMP Linux 2.6.37-rc1 on BMIPS5000 (single core dual thread) and observe some abnormalities when doing system suspend/resume which I narrowed down to cpu hotplugging. The suspend brings the second thread processor down and then restarts it, after which I see memory corruption in userspace. I started digging and found out that problem occurs because while doing execve() the child process is getting the same ASID as the parent, which obviously corrupts parent's address space. Further digging showed that activate_mm() calls get_new_mmu_context() to get a new ASID, but at this time ASID field in entryHi is 1, and asid_cache(cpu) is 0x100 (it was just reset to ASID_FIRST_VERSION when the secondary TP was booting). So, get_new_mmu_context() increments the asid_cache(cpu) value to 0x101, and thus puts 0x01 into entryHi. The result - ASID field does not get changed as it was supposed to. My solution is very simple - do not reset asid_cache(cpu) on TP warm restart. Patchwork: https://patchwork.linux-mips.org/patch/1797/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>		13 years ago
..
cpufreq	MIPS: errloongson2_clock: Fix build error by including linux/module.h	13 years ago
.gitignore	…
8250-platform.c	mips: remove needless include of module.h from core kernel files.	13 years ago
Makefile	MIPS: perf: Reorganize contents of perf support files.	14 years ago
asm-offsets.c	MIPS: Remove unused task_struct.trap_no field.	15 years ago
binfmt_elfn32.c	…
binfmt_elfo32.c	…
branch.c	MIPS: Sanitize restart logics	15 years ago
cevt-bcm1480.c	MIPS: Add missing #inclusions of <linux/irq.h>	15 years ago
cevt-ds1287.c	MIPS: Add missing #inclusions of <linux/irq.h>	15 years ago
cevt-gt641xx.c	MIPS: Add missing #inclusions of <linux/irq.h>	15 years ago
cevt-r4k.c	MIPS: Kernel hangs occasionally during boot.	13 years ago
cevt-sb1250.c	MIPS: Add missing #inclusions of <linux/irq.h>	15 years ago
cevt-smtc.c	MIPS: Add missing #inclusions of <linux/irq.h>	15 years ago
cevt-txx9.c	mips: convert to clocksource_register_hz/khz	14 years ago
cpu-bugs64.c	Fix common misspellings	14 years ago
cpu-probe.c	Merge branch 'modsplit-Oct31_2011' of git://git.kernel.org/pub/scm/linux/kernel/git/paulg/linux	13 years ago
csrc-bcm1480.c	mips: convert to clocksource_register_hz/khz	14 years ago
csrc-ioasic.c	mips: convert to clocksource_register_hz/khz	14 years ago
csrc-powertv.c	mips: convert to clocksource_register_hz/khz	14 years ago
csrc-r4k.c	mips: convert to clocksource_register_hz/khz	14 years ago
csrc-sb1250.c	mips: convert to clocksource_register_hz/khz	14 years ago
early_printk.c	…
entry.S	MIPS: Split do_syscall_trace into two functions.	14 years ago
ftrace.c	MIPS: Ftrace: Fix the CONFIG_DYNAMIC_FTRACE=n compile	14 years ago
genex.S	…
gpio_txx9.c	…
head.S	…
i8253.c	mips: migrate core kernel file from module.h --> export.h	13 years ago
i8259.c	MIPS: i8259: Mark cascade interrupt non-threaded	14 years ago
init_task.c	mips: migrate core kernel file from module.h --> export.h	13 years ago
irq-gic.c	MIPS: Convert the irq functions to the new names	14 years ago
irq-gt641xx.c	MIPS: Convert the irq functions to the new names	14 years ago
irq-msc01.c	mips: remove needless include of module.h from core kernel files.	13 years ago
irq-rm7000.c	MIPS: Convert the irq functions to the new names	14 years ago
irq-rm9000.c	MIPS: Convert the irq functions to the new names	14 years ago
irq.c	mips: remove needless include of module.h from core kernel files.	13 years ago
irq_cpu.c	MIPS: Install handlers for software IRQs	14 years ago
irq_txx9.c	MIPS: Convert the irq functions to the new names	14 years ago
jump_label.c	MIPS: jump label: Add MIPS support.	14 years ago
kgdb.c	MIPS: Fix a typo.	15 years ago
kprobes.c	MIPS: kprobe: Add support.	15 years ago
kspd.c	MIPS: kspd: Adjust confusing if indentation	15 years ago
linux32.c	MIPS: Compat: Use 32-bit wrapper for compat_sys_futex.	14 years ago
machine_kexec.c	…
mcount.S	MIPS: tracing: Fix the indentation of mcount.S	15 years ago
mips-mt-fpaff.c	MIPS: MT: Fix build error iFPU affinity code	15 years ago
mips-mt.c	mips: migrate core kernel file from module.h --> export.h	13 years ago
mips_ksyms.c	mips: migrate core kernel file from module.h --> export.h	13 years ago
mips_machine.c	MIPS: Add generic support for multiple machines within a single kernel	14 years ago
module.c	mips: remove needless include of module.h from core kernel files.	13 years ago
octeon_switch.S	update David Miller's old email address	14 years ago
perf_event.c	MIPS: perf: Reorganize contents of perf support files.	14 years ago
perf_event_mipsxx.c	MIPS: perf: Add Octeon support for hardware perf.	14 years ago
proc.c	MIPS: Probe for presence of KScratch registers.	14 years ago
process.c	mips: add export.h to files using EXPORT_SYMBOL/THIS_MODULE	13 years ago
prom.c	mips: migrate core kernel file from module.h --> export.h	13 years ago
ptrace.c	MIPS: Split do_syscall_trace into two functions.	14 years ago
ptrace32.c	…
r4k_fpu.S	update David Miller's old email address	14 years ago
r4k_switch.S	update David Miller's old email address	14 years ago
r2300_fpu.S	update David Miller's old email address	14 years ago
r2300_switch.S	update David Miller's old email address	14 years ago
r6000_fpu.S	update David Miller's old email address	14 years ago
relocate_kernel.S	…
reset.c	mips: migrate core kernel file from module.h --> export.h	13 years ago
rtlx.c	mips: remove needless include of module.h from core kernel files.	13 years ago
scall32-o32.S	MIPS: Hook up process_vm_readv and process_vm_writev system calls.	13 years ago
scall64-64.S	MIPS: Hook up process_vm_readv and process_vm_writev system calls.	13 years ago
scall64-n32.S	MIPS: Hook up process_vm_readv and process_vm_writev system calls.	13 years ago
scall64-o32.S	MIPS: Hook up process_vm_readv and process_vm_writev system calls.	13 years ago
setup.c	mips: migrate core kernel file from module.h --> export.h	13 years ago
signal-common.h	MIPS: Move signal trampolines off of the stack.	15 years ago
signal.c	MIPS: Handle __put_user() sleeping.	14 years ago
signal32.c	MIPS: Fix GCC-4.6 'set but not used' warning in signal*.c	14 years ago
signal_n32.c	MIPS: do_sigaltstack() expects userland pointers	15 years ago
smp-cmp.c	atomic: use <linux/atomic.h>	14 years ago
smp-mt.c	atomic: use <linux/atomic.h>	14 years ago
smp-up.c	…
smp.c	atomic: use <linux/atomic.h>	14 years ago
smtc-asm.S	…
smtc-proc.c	atomic: use <linux/atomic.h>	14 years ago
smtc.c	atomic: use <linux/atomic.h>	14 years ago
spinlock_test.c	mips: migrate core kernel file from module.h --> export.h	13 years ago
spram.c	…
stacktrace.c	mips: migrate core kernel file from module.h --> export.h	13 years ago
sync-r4k.c	atomic: use <linux/atomic.h>	14 years ago
syscall.c	MIPS: Move arch_get_unmapped_area and gang to new file.	14 years ago
time.c	mips: migrate core kernel file from module.h --> export.h	13 years ago
topology.c	…
traps.c	MIPS: ASID conflict after CPU hotplug	13 years ago
unaligned.c	mips: remove needless include of module.h from core kernel files.	13 years ago
vdso.c	MIPS: Make init_vdso a subsys_initcall.	15 years ago
vmlinux.lds.S	Merge branch 'for-2.6.40' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/percpu	14 years ago
vpe.c	mips: remove needless include of module.h from core kernel files.	13 years ago
watch.c	…