linux-kernel - Re: [PATCH 3/3] dcache: account external names as indirectly reclaimable memory

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Message-ID: <20180413143716.GA5378@cmpxchg.org>
Date:   Fri, 13 Apr 2018 10:37:16 -0400
From:   Johannes Weiner <hannes@...xchg.org>
To:     Michal Hocko <mhocko@...nel.org>
Cc:     Vlastimil Babka <vbabka@...e.cz>, Minchan Kim <minchan@...nel.org>,
        Roman Gushchin <guro@...com>, linux-mm@...ck.org,
        Andrew Morton <akpm@...ux-foundation.org>,
        Alexander Viro <viro@...iv.linux.org.uk>,
        linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org,
        kernel-team@...com
Subject: Re: [PATCH 3/3] dcache: account external names as indirectly
 reclaimable memory

On Fri, Apr 13, 2018 at 04:28:21PM +0200, Michal Hocko wrote:
> On Fri 13-04-18 16:20:00, Vlastimil Babka wrote:
> > We would need kmalloc-reclaimable-X variants. It could be worth it,
> > especially if we find more similar usages. I suspect they would be more
> > useful than the existing dma-kmalloc-X :)
> 
> I am still not sure why __GFP_RECLAIMABLE cannot be made work as
> expected and account slab pages as SLAB_RECLAIMABLE

Can you outline how this would work without separate caches?