linux-kernel - Re: [PATCH 4/4] mm: delay page_remove_rmap() until after the TLB has been flushed

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Date:   Wed, 9 Nov 2022 12:48:55 -0800
From:   Linus Torvalds <torvalds@...ux-foundation.org>
To:     Hugh Dickins <hughd@...gle.com>,
        Johannes Weiner <hannes@...xchg.org>,
        Andrew Morton <akpm@...ux-foundation.org>
Cc:     linux-kernel@...r.kernel.org, linux-mm@...ck.org,
        Nadav Amit <nadav.amit@...il.com>,
        Will Deacon <will@...nel.org>,
        Aneesh Kumar <aneesh.kumar@...ux.ibm.com>,
        Nick Piggin <npiggin@...il.com>,
        Heiko Carstens <hca@...ux.ibm.com>,
        Vasily Gorbik <gor@...ux.ibm.com>,
        Alexander Gordeev <agordeev@...ux.ibm.com>,
        Christian Borntraeger <borntraeger@...ux.ibm.com>,
        Sven Schnelle <svens@...ux.ibm.com>,
        Peter Zijlstra <peterz@...radead.org>,
        Gerald Schaefer <gerald.schaefer@...ux.ibm.com>
Subject: Re: [PATCH 4/4] mm: delay page_remove_rmap() until after the TLB has
 been flushed

Bah, in carefully removing all the "let's send it as a reply to the
previous thread" command line flags, I cleverly also skipped adding a
cover letter, so this updated series got sent out without one.

I need more coffee.

But hey, it's not like the people cc'd haven't seen it before, and if
you want to see *all* the patches (I didn't want to patch-bomb people
with the prep-work), at least 'b4' is happy so you can get it all with
just

   b4 am 20221109203051.1835763-1-torvalds@...ux-foundation.org

this time.

The main changes to the previously posted series are

 (a) try to  move the s390 changes to generic code

 (b) build-time checking for the value range of the flags passed to
encode_page()

 (c) added comments both to code and commit messages

I'm sure I messed something up in the process, not just the lack of
cover letter which has now turned into this "tail letter" instead.

                 Linus