diff options
Diffstat (limited to 'kernel/power')
| -rw-r--r-- | kernel/power/Kconfig | 6 | ||||
| -rw-r--r-- | kernel/power/process.c | 26 |
2 files changed, 23 insertions, 9 deletions
diff --git a/kernel/power/Kconfig b/kernel/power/Kconfig index ae44a70aae8a..619ecabf7c58 100644 --- a/kernel/power/Kconfig +++ b/kernel/power/Kconfig @@ -56,7 +56,7 @@ config PM_TRACE config SOFTWARE_SUSPEND bool "Software Suspend" - depends on PM && SWAP && (X86 && (!SMP || SUSPEND_SMP)) || ((FRV || PPC32) && !SMP) + depends on PM && SWAP && ((X86 && (!SMP || SUSPEND_SMP) && !X86_PAE) || ((FRV || PPC32) && !SMP)) ---help--- Enable the possibility of suspending the machine. It doesn't need ACPI or APM. @@ -78,6 +78,10 @@ config SOFTWARE_SUSPEND For more information take a look at <file:Documentation/power/swsusp.txt>. + (For now, swsusp is incompatible with PAE aka HIGHMEM_64G on i386. + we need identity mapping for resume to work, and that is trivial + to get with 4MB pages, but less than trivial on PAE). + config PM_STD_PARTITION string "Default resume partition" depends on SOFTWARE_SUSPEND diff --git a/kernel/power/process.c b/kernel/power/process.c index b2a5f671d6cd..72e72d2c61e6 100644 --- a/kernel/power/process.c +++ b/kernel/power/process.c @@ -66,13 +66,25 @@ static inline void freeze_process(struct task_struct *p) } } +static void cancel_freezing(struct task_struct *p) +{ + unsigned long flags; + + if (freezing(p)) { + pr_debug(" clean up: %s\n", p->comm); + do_not_freeze(p); + spin_lock_irqsave(&p->sighand->siglock, flags); + recalc_sigpending_tsk(p); + spin_unlock_irqrestore(&p->sighand->siglock, flags); + } +} + /* 0 = success, else # of processes that we failed to stop */ int freeze_processes(void) { int todo, nr_user, user_frozen; unsigned long start_time; struct task_struct *g, *p; - unsigned long flags; printk( "Stopping tasks: " ); start_time = jiffies; @@ -85,6 +97,10 @@ int freeze_processes(void) continue; if (frozen(p)) continue; + if (p->state == TASK_TRACED && frozen(p->parent)) { + cancel_freezing(p); + continue; + } if (p->mm && !(p->flags & PF_BORROWED_MM)) { /* The task is a user-space one. * Freeze it unless there's a vfork completion @@ -126,13 +142,7 @@ int freeze_processes(void) do_each_thread(g, p) { if (freezeable(p) && !frozen(p)) printk(KERN_ERR " %s\n", p->comm); - if (freezing(p)) { - pr_debug(" clean up: %s\n", p->comm); - p->flags &= ~PF_FREEZE; - spin_lock_irqsave(&p->sighand->siglock, flags); - recalc_sigpending_tsk(p); - spin_unlock_irqrestore(&p->sighand->siglock, flags); - } + cancel_freezing(p); } while_each_thread(g, p); read_unlock(&tasklist_lock); return todo; |