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Date: Fri, 25 Sep 2015 15:01:38 -0400 From: Johannes Weiner <hannes@...xchg.org> To: Mel Gorman <mgorman@...hsingularity.net> Cc: Andrew Morton <akpm@...ux-foundation.org>, Rik van Riel <riel@...hat.com>, Vlastimil Babka <vbabka@...e.cz>, David Rientjes <rientjes@...gle.com>, Joonsoo Kim <iamjoonsoo.kim@....com>, Michal Hocko <mhocko@...nel.org>, Linux-MM <linux-mm@...ck.org>, LKML <linux-kernel@...r.kernel.org> Subject: Re: [PATCH 05/10] mm, page_alloc: Distinguish between being unable to sleep, unwilling to sleep and avoiding waking kswapd On Fri, Sep 25, 2015 at 01:51:06PM +0100, Mel Gorman wrote: > On Thu, Sep 24, 2015 at 04:55:09PM -0400, Johannes Weiner wrote: > > On Mon, Sep 21, 2015 at 11:52:37AM +0100, Mel Gorman wrote: > > > @@ -119,10 +134,10 @@ struct vm_area_struct; > > > #define GFP_USER (__GFP_WAIT | __GFP_IO | __GFP_FS | __GFP_HARDWALL) > > > #define GFP_HIGHUSER (GFP_USER | __GFP_HIGHMEM) > > > #define GFP_HIGHUSER_MOVABLE (GFP_HIGHUSER | __GFP_MOVABLE) > > > -#define GFP_IOFS (__GFP_IO | __GFP_FS) > > > -#define GFP_TRANSHUGE (GFP_HIGHUSER_MOVABLE | __GFP_COMP | \ > > > - __GFP_NOMEMALLOC | __GFP_NORETRY | __GFP_NOWARN | \ > > > - __GFP_NO_KSWAPD) > > > +#define GFP_IOFS (__GFP_IO | __GFP_FS | __GFP_KSWAPD_RECLAIM) > > > > These are some really odd semantics to be given a name like that. > > > > GFP_IOFS was introduced as a short-hand for testing/setting/clearing > > these two bits at the same time, not to be used for allocations. In > > fact, the only user for allocations is lustre, and it's not at all > > obious why those sites shouldn't include __GFP_WAIT as well. > > > > Removing this definition altogether would probably be best. > > Ok, I'll add a TODO to create a patch that removes GFP_IOFS entirely. It > can be tacked on to the end of the series. Okay, that makes sense to me. Thanks! Acked-by: Johannes Weiner <hannes@...xchg.org> -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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