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Date: Wed, 8 Jul 2026 14:13:41 -0700
From: Andrew Morton <akpm@linux-foundation.org>
To: Abhishek Bapat <abhishekbapat@google.com>
Cc: Suren Baghdasaryan <surenb@google.com>, Kent Overstreet
 <kent.overstreet@linux.dev>, Hao Ge <hao.ge@linux.dev>, Shuah Khan
 <skhan@linuxfoundation.org>, Jonathan Corbet <corbet@lwn.net>,
 linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org,
 linux-mm@kvack.org, Sourav Panda <souravpanda@google.com>
Subject: Re: [PATCH v8 0/6] alloc_tag: introduce IOCTL-based filtering for
 MAP
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In-Reply-To: <cover.1783532853.git.abhishekbapat@google.com>
References: <cover.1783532853.git.abhishekbapat@google.com>
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On Wed,  8 Jul 2026 18:01:22 +0000 Abhishek Bapat <abhishekbapat@google.com> wrote:

> Currently, memory allocation profiling data is primarily exposed through
> /proc/allocinfo. While useful for manual inspection, this text-based
> interface poses challenges for production monitoring and large-scale
> analysis:
> 
> 1. Userspace must parse large amounts of text to extract specific
> fields.
> 2. To find specific tags, userspace must read the entire dataset,
> requiring many context switches and high data copying.
> 3. The kernel currently aggregates per-CPU counters for every allocation
> size, even those the user intends to filter out immediately.
> 
> This series introduces a new IOCTL-based binary interface for allocinfo
> that supports kernel-side filtering.

Thanks.  The important bits are reviewed, let's get this in there for
some testing.

Sashiko had a lot to say:

	https://sashiko.dev/#/patchset/cover.1783532853.git.abhishekbapat@google.com

I think you've already been over this.  but please double-check - maybe
it found something new.