linux-kernel - Re: [Cluster-devel] [PATCH 06/32] sched: Add task_struct->faults_disabled

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Message-ID: <ZHBolpHP5JAmt65V@infradead.org>
Date:   Fri, 26 May 2023 01:06:46 -0700
From:   Christoph Hellwig <hch@...radead.org>
To:     Kent Overstreet <kent.overstreet@...ux.dev>
Cc:     Christoph Hellwig <hch@...radead.org>, Jan Kara <jack@...e.cz>,
        cluster-devel@...hat.com, "Darrick J . Wong" <djwong@...nel.org>,
        linux-kernel@...r.kernel.org, dhowells@...hat.com,
        linux-bcachefs@...r.kernel.org, linux-fsdevel@...r.kernel.org,
        Kent Overstreet <kent.overstreet@...il.com>
Subject: Re: [Cluster-devel] [PATCH 06/32] sched: Add
 task_struct->faults_disabled_mapping

On Thu, May 25, 2023 at 04:50:39PM -0400, Kent Overstreet wrote:
> A cache that isn't actually consistent is a _bug_. You're being
> Obsequious. And any time this has come up in previous discussions
> (including at LSF), that was never up for debate, the only question has
> been whether it was even possible to practically fix it.

That is not my impression.  But again, if you think it is useful,
go ahead and seel people on the idea.  But please prepare a series
that includes the rationale, performance tradeoffs and real live
implications for it.  And do it on the existing code that people use
and not just your shiny new thing.