linux-kernel - Re: Freeing page tables through RCU

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Date:   Fri, 26 Feb 2021 10:42:00 -0400
From:   Jason Gunthorpe <jgg@...pe.ca>
To:     Matthew Wilcox <willy@...radead.org>
Cc:     linux-mm@...ck.org, linuxppc-dev@...ts.ozlabs.org,
        linux-s390@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: Freeing page tables through RCU

On Thu, Feb 25, 2021 at 08:58:20PM +0000, Matthew Wilcox wrote:

> I'd like to hear better ideas than this.

You didn't like my suggestion to put a sleepable lock around the
freeing of page tables during flushing?

I still don't see how you convert the sleepable page walkers to use
rcu??

Jason