linux-kernel - Re: [PATCH v3 7/7] mm, slab: shorten kmalloc cache names for large sizes

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Message-ID: <20180719084601.bl7zeq3ube7vulgq@techsingularity.net>
Date:   Thu, 19 Jul 2018 09:46:01 +0100
From:   Mel Gorman <mgorman@...hsingularity.net>
To:     Vlastimil Babka <vbabka@...e.cz>
Cc:     Andrew Morton <akpm@...ux-foundation.org>, linux-mm@...ck.org,
        linux-kernel@...r.kernel.org, linux-api@...r.kernel.org,
        Roman Gushchin <guro@...com>, Michal Hocko <mhocko@...nel.org>,
        Johannes Weiner <hannes@...xchg.org>,
        Christoph Lameter <cl@...ux.com>,
        David Rientjes <rientjes@...gle.com>,
        Joonsoo Kim <iamjoonsoo.kim@....com>,
        Matthew Wilcox <willy@...radead.org>
Subject: Re: [PATCH v3 7/7] mm, slab: shorten kmalloc cache names for large
 sizes

On Wed, Jul 18, 2018 at 03:36:20PM +0200, Vlastimil Babka wrote:
> Kmalloc cache names can get quite long for large object sizes, when the sizes
> are expressed in bytes. Use 'k' and 'M' prefixes to make the names as short
> as possible e.g. in /proc/slabinfo. This works, as we mostly use power-of-two
> sizes, with exceptions only below 1k.
> 
> Example: 'kmalloc-4194304' becomes 'kmalloc-4M'
> 
> Suggested-by: Matthew Wilcox <willy@...radead.org>
> Signed-off-by: Vlastimil Babka <vbabka@...e.cz>

There is a slight chance this will break any external tooling that
calculates fragmentation stats for slab/slub if they are particularly
stupid parsers but other than that;

Acked-by: Mel Gorman <mgorman@...hsingularity.net>

-- 
Mel Gorman
SUSE Labs