Srivatsa S. Bhat 379e0be812 PM / Freezer: Thaw only kernel threads if freezing of kernel threads fails ... If freezing of kernel threads fails, we are expected to automatically thaw tasks in the error recovery path. However, at times, we encounter situations in which we would like the automatic error recovery path to thaw only the kernel threads, because we want to be able to do some more cleanup before we thaw userspace. Something like: error = freeze_kernel_threads(); if (error) { /* Do some cleanup */ /* Only then thaw userspace tasks*/ thaw_processes(); } An example of such a situation is where we freeze/thaw filesystems during suspend/hibernation. There, if freezing of kernel threads fails, we would like to thaw the frozen filesystems before thawing the userspace tasks. So, modify freeze_kernel_threads() to thaw only kernel threads in case of freezing failure. And change suspend_freeze_processes() accordingly. (At the same time, let us also get rid of the rather cryptic usage of the conditional operator (:?) in that function.) [rjw: In fact, this patch fixes a regression introduced during the 3.3 merge window, because without it thaw_processes() may be called before swsusp_free() in some situations and that may lead to massive memory allocation failures.] Signed-off-by: Srivatsa S. Bhat <srivatsa.bhat@linux.vnet.ibm.com> Acked-by: Tejun Heo <tj@kernel.org> Acked-by: Nigel Cunningham <nigel@tuxonice.net> Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>		2012-02-04 22:23:05 +01:00
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block_io.c
console.c
hibernate.c
Kconfig
main.c
Makefile
power.h	PM / Freezer: Thaw only kernel threads if freezing of kernel threads fails	2012-02-04 22:23:05 +01:00
poweroff.c
process.c	PM / Freezer: Thaw only kernel threads if freezing of kernel threads fails	2012-02-04 22:23:05 +01:00
qos.c
snapshot.c
suspend.c
suspend_test.c
swap.c
user.c	PM / Hibernate: Thaw kernel threads in SNAPSHOT_CREATE_IMAGE ioctl path	2012-02-01 22:16:36 +01:00