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| author | Nigel Cunningham <nigel@nigel.suspend2.net> | 2007-09-18 22:46:25 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-09-19 11:24:17 -0700 |
| commit | 019ad4a0a60b09022945273848b5a686e39a78aa (patch) | |
| tree | a54186525fec26bf6f1383d5756a879a09cf221e | |
| parent | 2c392a4f47f41b24432e6aa77bb5167d0bbb10c5 (diff) | |
| download | lwn-019ad4a0a60b09022945273848b5a686e39a78aa.tar.gz lwn-019ad4a0a60b09022945273848b5a686e39a78aa.zip | |
Fix failure to resume from initrds
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@nigel.suspend2.net>
Acked-by: Rafael J. Wysocki <rjw@sisk.pl>
Acked-by: Pavel Machek <pavel@ucw.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| -rw-r--r-- | init/do_mounts_initrd.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/init/do_mounts_initrd.c b/init/do_mounts_initrd.c index a6b4c0c08e13..fd4fc12d2624 100644 --- a/init/do_mounts_initrd.c +++ b/init/do_mounts_initrd.c @@ -57,8 +57,10 @@ 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)) { + try_to_freeze(); yield(); + } /* move initrd to rootfs' /old */ sys_fchdir(old_fd); |