linux-kernel - Re: [PATCH 1/3] mm: introduce NR_INDIRECTLY_RECLAIMABLE

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Message-ID: <20180425155539.GB8546@bombadil.infradead.org>
Date:   Wed, 25 Apr 2018 08:55:39 -0700
From:   Matthew Wilcox <willy@...radead.org>
To:     vinayak menon <vinayakm.list@...il.com>
Cc:     Roman Gushchin <guro@...com>, Vlastimil Babka <vbabka@...e.cz>,
        linux-mm@...ck.org, Andrew Morton <akpm@...ux-foundation.org>,
        Alexander Viro <viro@...iv.linux.org.uk>,
        Michal Hocko <mhocko@...e.com>,
        Johannes Weiner <hannes@...xchg.org>,
        linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org,
        kernel-team@...com, Linux API <linux-api@...r.kernel.org>
Subject: Re: [PATCH 1/3] mm: introduce NR_INDIRECTLY_RECLAIMABLE_BYTES

On Fri, Apr 13, 2018 at 05:43:39PM +0530, vinayak menon wrote:
> One such case I have encountered is that of the ION page pool. The page pool
> registers a shrinker. When not in any memory pressure page pool can go high
> and thus cause an mmap to fail when OVERCOMMIT_GUESS is set. I can send
> a patch to account ION page pool pages in NR_INDIRECTLY_RECLAIMABLE_BYTES.

Why not just account them as NR_SLAB_RECLAIMABLE?  I know it's not slab, but
other than that mis-naming, it seems like it'll do the right thing.