[dm-devel] [PATCH] SCHED: remove proliferation of wait_on_bit action functions.
Ingo Molnar
mingo at kernel.org
Fri Jun 6 06:04:19 UTC 2014
* NeilBrown <neilb at suse.de> wrote:
> On Thu, 5 Jun 2014 14:45:09 +0200 Ingo Molnar <mingo at kernel.org> wrote:
>
> >
> > * NeilBrown <neilb at suse.de> wrote:
> >
> > > On Thu, 22 May 2014 11:05:02 +0200 Ingo Molnar <mingo at kernel.org> wrote:
> > >
> > > >
> > > > * NeilBrown <neilb at suse.de> wrote:
> > > >
> > > > > [[ get_maintainer.pl suggested 61 email address for this patch.
> > > > > I've trimmed that list somewhat. Hope I didn't miss anyone
> > > > > important...
> > > > > I'm hoping it will go in through the scheduler tree, but would
> > > > > particularly like an Acked-by for the fscache parts. Other acks
> > > > > welcome.
> > > > > ]]
> > > > >
> > > > > The current "wait_on_bit" interface requires an 'action' function
> > > > > to be provided which does the actual waiting.
> > > > > There are over 20 such functions, many of them identical.
> > > > > Most cases can be satisfied by one of just two functions, one
> > > > > which uses io_schedule() and one which just uses schedule().
> > > > >
> > > > > So:
> > > > > Rename wait_on_bit and wait_on_bit_lock to
> > > > > wait_on_bit_action and wait_on_bit_lock_action
> > > > > to make it explicit that they need an action function.
> > > > >
> > > > > Introduce new wait_on_bit{,_lock} and wait_on_bit{,_lock}_io
> > > > > which are *not* given an action function but implicitly use
> > > > > a standard one.
> > > > > The decision to error-out if a signal is pending is now made
> > > > > based on the 'mode' argument rather than being encoded in the action
> > > > > function.
> > > >
> > > > this patch fails to build on x86-32 allyesconfigs.
> > >
> > > Could you share the build errors?
> >
> > Sure, find it attached below.
>
> Thanks.
>
> It looks like this is a wait_on_bit usage that was added after I created the
> patch.
>
> How about you drop my patch for now, we wait for -rc1 to come out, then I
> submit a new version against -rc1 and we get that into -rc2.
> That should minimise such conflicts.
>
> Does that work for you?
Sure, that sounds like a good approach, if Linus doesn't object.
Thanks,
Ingo
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