• Petr Mladek's avatar
    kthread: better support freezable kthread workers · dbf52682
    Petr Mladek authored
    This patch allows to make kthread worker freezable via a new @flags
    parameter. It will allow to avoid an init work in some kthreads.
    
    It currently does not affect the function of kthread_worker_fn()
    but it might help to do some optimization or fixes eventually.
    
    I currently do not know about any other use for the @flags
    parameter but I believe that we will want more flags
    in the future.
    
    Finally, I hope that it will not cause confusion with @flags member
    in struct kthread. Well, I guess that we will want to rework the
    basic kthreads implementation once all kthreads are converted into
    kthread workers or workqueues. It is possible that we will merge
    the two structures.
    
    Link: http://lkml.kernel.org/r/1470754545-17632-12-git-send-email-pmladek@suse.comSigned-off-by: default avatarPetr Mladek <pmladek@suse.com>
    Acked-by: default avatarTejun Heo <tj@kernel.org>
    Cc: Oleg Nesterov <oleg@redhat.com>
    Cc: Ingo Molnar <mingo@redhat.com>
    Cc: Peter Zijlstra <peterz@infradead.org>
    Cc: Steven Rostedt <rostedt@goodmis.org>
    Cc: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com>
    Cc: Josh Triplett <josh@joshtriplett.org>
    Cc: Thomas Gleixner <tglx@linutronix.de>
    Cc: Jiri Kosina <jkosina@suse.cz>
    Cc: Borislav Petkov <bp@suse.de>
    Cc: Michal Hocko <mhocko@suse.cz>
    Cc: Vlastimil Babka <vbabka@suse.cz>
    Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
    Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
    dbf52682
kthread.c 32.1 KB