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

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Message-ID: <9e019ae9-b6a8-c824-8913-dd02a8e6e6ce@suse.cz>
Date:   Tue, 31 Jul 2018 10:55:39 +0200
From:   Vlastimil Babka <vbabka@...e.cz>
To:     Christopher Lameter <cl@...ux.com>
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>,
        David Rientjes <rientjes@...gle.com>,
        Joonsoo Kim <iamjoonsoo.kim@....com>,
        Mel Gorman <mgorman@...hsingularity.net>,
        Matthew Wilcox <willy@...radead.org>
Subject: Re: [PATCH v3 7/7] mm, slab: shorten kmalloc cache names for large
 sizes

On 07/30/2018 05:48 PM, Christopher Lameter wrote:
> On Wed, 18 Jul 2018, Vlastimil Babka wrote:
> 
>> +static const char *
>> +kmalloc_cache_name(const char *prefix, unsigned int size)
>> +{
>> +
>> +	static const char units[3] = "\0kM";
>> +	int idx = 0;
>> +
>> +	while (size >= 1024 && (size % 1024 == 0)) {
>> +		size /= 1024;
>> +		idx++;
>> +	}
>> +
>> +	return kasprintf(GFP_NOWAIT, "%s-%u%c", prefix, size, units[idx]);
>> +}
> 
> This is likely to occur elsewhere in the kernel. Maybe generalize it a
> bit?

I'll try later on top, as that's generic printf code then.

> Acked-by: Christoph Lameter <cl@...ux.com>

Thanks for all acks.

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