On Tue, Mar 24, 2015 at 09:02:13PM -0700, David Rientjes wrote:
> On Thu, 19 Mar 2015, Naoya Horiguchi wrote:
> 
> > This cleanup patch moves all strings passed to action_result() into a single
> > array action_page_type so that a reader can easily find which kind of action
> > results are possible. And this patch also fixes the odd lines to be printed
> > out, like "unknown page state page" or "free buddy, 2nd try page".
> > 
> > Signed-off-by: Naoya Horiguchi <[email protected]>
> > ---
> >  mm/memory-failure.c | 107 
> > +++++++++++++++++++++++++++++++++++++---------------
> >  1 file changed, 76 insertions(+), 31 deletions(-)
> > 
> > diff --git v3.19.orig/mm/memory-failure.c v3.19/mm/memory-failure.c
> > index d487f8dc6d39..afb740e1c8b0 100644
> > --- v3.19.orig/mm/memory-failure.c
> > +++ v3.19/mm/memory-failure.c
> > @@ -521,6 +521,52 @@ static const char *action_name[] = {
> >     [RECOVERED] = "Recovered",
> >  };
> >  
> > +enum page_type {
> > +   KERNEL,
> > +   KERNEL_HIGH_ORDER,
> > +   SLAB,
> > +   DIFFERENT_COMPOUND,
> > +   POISONED_HUGE,
> > +   HUGE,
> > +   FREE_HUGE,
> > +   UNMAP_FAILED,
> > +   DIRTY_SWAPCACHE,
> > +   CLEAN_SWAPCACHE,
> > +   DIRTY_MLOCKED_LRU,
> > +   CLEAN_MLOCKED_LRU,
> > +   DIRTY_UNEVICTABLE_LRU,
> > +   CLEAN_UNEVICTABLE_LRU,
> > +   DIRTY_LRU,
> > +   CLEAN_LRU,
> > +   TRUNCATED_LRU,
> > +   BUDDY,
> > +   BUDDY_2ND,
> > +   UNKNOWN,
> > +};
> > +
> 
> I like the patch because of the consistency in output and think it's worth 
> the extra 1% .text size.
> 
> My only concern is the generic naming of the enum members.  
> memory-failure.c is already an offender with "enum outcome" and the naming 
> of its members.
>
> Would you mind renaming these to be prefixed with "MSG_"?

no, your naming is clearer and represents better what it is, so I agree with it.

> These enums should be anonymous, too, nothing is referencing enum outcome 
> or your new enum page_type.
> 

Or the type of action_result()'s 2nd parameter can be "enum page_type".

Thanks,
Naoya Horiguchi--
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