From 6161b2ce8116b9a623260ab811e2c035b3fac2e5 Mon Sep 17 00:00:00 2001 From: Pavel Machek <pavel@ucw.cz> Date: Sat, 3 Sep 2005 15:57:05 -0700 Subject: [PATCH] pm: fix process freezing If process freezing fails, some processes are frozen, and rest are left in "were asked to be frozen" state. Thats wrong, we should leave it in some consistent state. Signed-off-by: Pavel Machek <pavel@suse.cz> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org> --- kernel/power/process.c | 24 ++++++++++++++++++++++-- 1 file changed, 22 insertions(+), 2 deletions(-) (limited to 'kernel/power') diff --git a/kernel/power/process.c b/kernel/power/process.c index f7da5bfc914e..28de118f7a0b 100644 --- a/kernel/power/process.c +++ b/kernel/power/process.c @@ -81,13 +81,33 @@ int freeze_processes(void) } while_each_thread(g, p); read_unlock(&tasklist_lock); yield(); /* Yield is okay here */ - if (time_after(jiffies, start_time + TIMEOUT)) { + if (todo && time_after(jiffies, start_time + TIMEOUT)) { printk( "\n" ); printk(KERN_ERR " stopping tasks failed (%d tasks remaining)\n", todo ); - return todo; + break; } } while(todo); + /* This does not unfreeze processes that are already frozen + * (we have slightly ugly calling convention in that respect, + * and caller must call thaw_processes() if something fails), + * but it cleans up leftover PF_FREEZE requests. + */ + if (todo) { + read_lock(&tasklist_lock); + do_each_thread(g, p) + 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); + } + while_each_thread(g, p); + read_unlock(&tasklist_lock); + return todo; + } + printk( "|\n" ); BUG_ON(in_atomic()); return 0; -- cgit v1.2.3