Re: [RESEND PATCH V2] mm: page_alloc: unreserve highatomic page blocks before oom

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To: Joakim Tjernlund <Joakim.Tjernlund@xxxxxxxxxxxx>
Subject: Re: [RESEND PATCH V2] mm: page_alloc: unreserve highatomic page blocks before oom
From: Greg KH <gregkh@xxxxxxxxxxxxxxxxxxx>
Date: Mon, 22 Jan 2024 09:41:38 -0800
Cc: "quic_charante@xxxxxxxxxxx" <quic_charante@xxxxxxxxxxx>, "david@xxxxxxxxxx" <david@xxxxxxxxxx>, "mhocko@xxxxxxxx" <mhocko@xxxxxxxx>, "akpm@xxxxxxxxxxxxxxxxxxxx" <akpm@xxxxxxxxxxxxxxxxxxxx>, "linux-mm@xxxxxxxxx" <linux-mm@xxxxxxxxx>, "hannes@xxxxxxxxxxx" <hannes@xxxxxxxxxxx>, "mgorman@xxxxxxxxxxxxxxxxxxx" <mgorman@xxxxxxxxxxxxxxxxxxx>, "linux-kernel@xxxxxxxxxxxxxxx" <linux-kernel@xxxxxxxxxxxxxxx>, "quic_pkondeti@xxxxxxxxxxx" <quic_pkondeti@xxxxxxxxxxx>, "vbabka@xxxxxxx" <vbabka@xxxxxxx>, "stable@xxxxxxxxxxxxxxx" <stable@xxxxxxxxxxxxxxx>, "quic_cgoldswo@xxxxxxxxxxx" <quic_cgoldswo@xxxxxxxxxxx>
In-reply-to: <3fe3b3edd33cd784071dd9b459d20a79605ec918.camel@infinera.com>
References: <1700823445-27531-1-git-send-email-quic_charante@quicinc.com> <3fe3b3edd33cd784071dd9b459d20a79605ec918.camel@infinera.com>

On Thu, Jan 18, 2024 at 05:23:58PM +0000, Joakim Tjernlund wrote:
> Could this patch be backported to stable? I have seen similar OOMs with
> reserved_highatomic:4096KB
> 
> Upstream commit: 04c8716f7b0075def05dc05646e2408f318167d2

Backported to exactly where?  This commit is in the 4.20 kernel and
newer, please tell me you aren't relying on the 4.19.y kernel anymore...

thanks,

greg k-h

References:
- [RESEND PATCH V2] mm: page_alloc: unreserve highatomic page blocks before oom
  - From: Charan Teja Kalla
- Re: [RESEND PATCH V2] mm: page_alloc: unreserve highatomic page blocks before oom
  - From: Joakim Tjernlund

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