linux-kernel - Re: [PATCH] mm/show_mem.c: report alloc tags in human readable units

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Message-ID: <cu62ykkqsnuef45qn44wucsqqmpexx2isadwwuu26rny6femip@ptdf3u6zgcqp>
Date: Thu, 5 Sep 2024 23:52:34 -0400
From: Kent Overstreet <kent.overstreet@...ux.dev>
To: Suren Baghdasaryan <surenb@...gle.com>
Cc: akpm@...ux-foundation.org, linux-kernel@...r.kernel.org, 
	linux-mm@...ck.org
Subject: Re: [PATCH] mm/show_mem.c: report alloc tags in human readable units

On Thu, Sep 05, 2024 at 08:32:24PM GMT, Suren Baghdasaryan wrote:
> On Thu, Sep 5, 2024 at 5:53 PM Kent Overstreet
> <kent.overstreet@...ux.dev> wrote:
> >
> > We already do this when reporting slab info - more consistent and more
> > readable.
> 
> Hi Kent,
> I remember we discussed this before and agreed upon Pasha's suggestion
> that if needed one could do:
> 
> # sort -g /proc/allocinfo|tail|numfmt --to=iec
>         2.8M    22648 fs/kernfs/dir.c:615 func:__kernfs_new_node
>         3.8M      953 mm/memory.c:4214 func:alloc_anon_folio
>         4.0M     1010 drivers/staging/ctagmod/ctagmod.c:20 [ctagmod]
> func:ctagmod_start
>         4.1M        4 net/netfilter/nf_conntrack_core.c:2567
> func:nf_ct_alloc_hashtable
>         6.0M     1532 mm/filemap.c:1919 func:__filemap_get_folio
>         8.8M     2785 kernel/fork.c:307 func:alloc_thread_stack_node
>          13M      234 block/blk-mq.c:3421 func:blk_mq_alloc_rqs
>          14M     3520 mm/mm_init.c:2530 func:alloc_large_system_hash
>          15M     3656 mm/readahead.c:247 func:page_cache_ra_unbounded
>          55M     4887 mm/slub.c:2259 func:alloc_slab_page
>         122M    31168 mm/page_ext.c:270 func:alloc_page_ext
> 
> That's even documented here:
> https://elixir.bootlin.com/linux/v6.10.8/source/Documentation/mm/allocation-profiling.rst#L36
> Did something change?

That's for /proc/allocinfo, which this patch doesn't change - this is
the oom report.