Messages in this thread | | | Date | Sat, 24 Oct 2015 21:48:26 +0200 | From | Oleg Nesterov <> | Subject | Re: + signal-turn-dequeue_signal_lock-into-kernel_dequeue_signal.patch added to -mm tree |
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Hi Markus,
s/mm-commits/lkml/
On 10/24, Markus Pargmann wrote: > > On Mon, Oct 05, 2015 at 02:19:27PM -0700, akpm@linux-foundation.org wrote: > > > > Subject: signal: turn dequeue_signal_lock() into kernel_dequeue_signal() > > > > 1. Rename dequeue_signal_lock() to kernel_dequeue_signal(). This > > matches another "for kthreads only" kernel_sigaction() helper. > > > > 2. Remove the "tsk" and "mask" arguments, they are always current > > and current->blocked. And it is simply wrong if tsk != current. > > > > 3. We could also remove the 3rd "siginfo_t *info" arg but it looks > > potentially useful. However we can simplify the callers if we > > change kernel_dequeue_signal() to accept info => NULL. > > > > 4. Remove _irqsave, it is never called from atomic context. > > I just realised that this patch will conflict with a fixup patch for nbd > that will be included in rc7. > > dcc909d90ccd (nbd: Add locking for tasks) > > I think there is basically one new instance of dequeue_signal_lock() that > needs to be replaced with kernel_dequeue_signal().
Thanks! I'll send *-fix.patch to Andrew.
But you know, dcc909d90ccd (nbd: Add locking for tasks) doesn't look exactly right at first glance, although I need to re-check tomorrow...
One question, can sock_xmit() be called from user space? Or it is only called by kthreads?
Oleg.
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