linux-kernel - Re: [PATCH v2 2/3] mm/page_alloc: Add trace event for per-zone lowmem reserve setup

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <611025a1-d6aa-57a9-5848-73874eee0dba@google.com>
Date: Sun, 9 Mar 2025 17:53:59 -0700 (PDT)
From: David Rientjes <rientjes@...gle.com>
To: Martin Liu <liumartin@...gle.com>
cc: Steven Rostedt <rostedt@...dmis.org>, 
    Masami Hiramatsu <mhiramat@...nel.org>, 
    Mathieu Desnoyers <mathieu.desnoyers@...icios.com>, 
    Andrew Morton <akpm@...ux-foundation.org>, linux-kernel@...r.kernel.org, 
    linux-trace-kernel@...r.kernel.org, linux-mm@...ck.org
Subject: Re: [PATCH v2 2/3] mm/page_alloc: Add trace event for per-zone lowmem
 reserve setup

On Sat, 8 Mar 2025, Martin Liu wrote:

> This commit introduces the `mm_setup_per_zone_lowmem_reserve` trace
> event,which provides detailed insights into the kernel's per-zone lowmem
> reserve configuration.
> 
> The trace event provides precise timestamps, allowing developers to
> 
> 1. Correlate lowmem reserve changes with specific kernel events and
> able to diagnose unexpected kswapd or direct reclaim behavior
> triggered by dynamic changes in lowmem reserve.
> 
> 2. know memory allocation failures that occur due to insufficient lowmem
> reserve, by precisely correlating allocation attempts with reserve
> adjustments.
> 
> Signed-off-by: Martin Liu <liumartin@...gle.com>

Acked-by: David Rientjes <rientjes@...gle.com>