[PATCH] Fix failure to resume from initrds.

[Nigel Cunningham]

Hi all.

Commit 831441862956fffa17b9801db37e6ea1650b0f69 (Freezer: make kernel threads
nonfreezable by default) breaks freezing when attempting to resume from an
initrd, because the init (which is freezeable) spins while waiting for another
thread to run /linuxrc, but doesn't check whether it has been told to enter
the refrigerator. The original patch replaced a call to try_to_freeze() with a
call to yield(). I believe a simple reversion is wrong because
if !CONFIG_PM_SLEEP, try_to_freeze() is a noop. It should still yield.

Signed-off-by: Nigel Cunningham <nigel@xxxxxxxxxxxxxxxxxx>

 do_mounts_initrd.c |    4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)
diff -ruNp 952-fix-initrd-resume.patch-old/init/do_mounts_initrd.c 952-fix-initrd-resume.patch-new/init/do_mounts_initrd.c
--- 952-fix-initrd-resume.patch-old/init/do_mounts_initrd.c	2007-09-11 13:43:31.000000000 +1000
+++ 952-fix-initrd-resume.patch-new/init/do_mounts_initrd.c	2007-09-11 13:19:50.000000000 +1000
@@ -58,8 +58,10 @@ static void __init handle_initrd(void)
 
 	pid = kernel_thread(do_linuxrc, "/linuxrc", SIGCHLD);
 	if (pid > 0)
-		while (pid != sys_wait4(-1, NULL, 0, NULL))
+		while (pid != sys_wait4(-1, NULL, 0, NULL)) {
 			yield();
+			try_to_freeze();
+		}
 
 	if (!resume_attempted)
 		printk(KERN_ERR "Suspend2: No attempt was made to resume from "

-- 
See http://www.tuxonice.net for Howtos, FAQs, mailing
lists, wiki and bugzilla info.
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/