On Thursday, 22 of November 2007, Pavel Machek wrote: > Hi! > > > Add appropriate freezer annotations to handle_initrd(), so that it's possible > > to resume from disk from an initrd. > > > > This patch fixes Bug #9345: http://bugzilla.kernel.org/show_bug.cgi?id=9345 > > > Unfortunately, bugzilla does not help me in understanding this. > > > Index: linux-2.6/init/do_mounts_initrd.c > > =================================================================== > > --- linux-2.6.orig/init/do_mounts_initrd.c > > +++ linux-2.6/init/do_mounts_initrd.c > > @@ -55,12 +55,18 @@ static void __init handle_initrd(void) > > sys_mount(".", "/", NULL, MS_MOVE, NULL); > > sys_chroot("."); > > > > + /* > > + * In case that a resume from disk is carried out by linuxrc or one of > > + * its children, we need to tell the freezer not to wait for us. > > + */ > > + current->flags |= PF_FREEZER_SKIP; > > + > > pid = kernel_thread(do_linuxrc, "/linuxrc", SIGCHLD); > > if (pid > 0) > > - while (pid != sys_wait4(-1, NULL, 0, NULL)) { > > - try_to_freeze(); > > + while (pid != sys_wait4(-1, NULL, 0, NULL)) > > yield(); > > - } > > + > > + current->flags &= ~PF_FREEZER_SKIP; > > New code should work (but it is uglier than the old one). Well, the old code plain doesn't work ... > What was wrong with the old one? Refrigerator should make sys_wait4() return, It doesn't, because the task as no mm and is therefore considered as a kernel thread and not sent a signal. This _really_ is an exceptional case. Greetings, Rafael _______________________________________________ linux-pm mailing list linux-pm@xxxxxxxxxxxxxxxxxxxxxxxxxx https://lists.linux-foundation.org/mailman/listinfo/linux-pm
