linux-kernel - Re: [RFC][PATCH 01/12] mm/vmscan: restore zone_reclaim

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Date:   Wed, 7 Oct 2020 08:45:10 +0000 (UTC)
From:   Christopher Lameter <cl@...ux.com>
To:     Dave Hansen <dave.hansen@...ux.intel.com>
cc:     linux-kernel@...r.kernel.org, ben.widawsky@...el.com,
        rientjes@...gle.com, alex.shi@...ux.alibaba.com, dwagner@...e.de,
        tobin@...nel.org, akpm@...ux-foundation.org, ying.huang@...el.com,
        dan.j.williams@...el.com, cai@....pw, stable@...r.kernel.org
Subject: Re: [RFC][PATCH 01/12] mm/vmscan: restore zone_reclaim_mode ABI

On Tue, 6 Oct 2020, Dave Hansen wrote:

> But, when the bit was removed (bit 0) the _other_ bit locations also
> got changed.  That's not OK because the bit values are documented to
> mean one specific thing and users surely rely on them meaning that one
> thing and not changing from kernel to kernel.  The end result is that
> if someone had a script that did:

Exactly right. Sorry must have missed to review that patch.

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