linux-kernel - Re: [PATCH v1 0/4] mm: Fix apply_to_pte

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Message-Id: <20250407113543.6a43461e397d58471e407323@linux-foundation.org>
Date: Mon, 7 Apr 2025 11:35:43 -0700
From: Andrew Morton <akpm@...ux-foundation.org>
To: Alexander Gordeev <agordeev@...ux.ibm.com>
Cc: Andrey Ryabinin <ryabinin.a.a@...il.com>, Hugh Dickins
 <hughd@...gle.com>, Nicholas Piggin <npiggin@...il.com>, Guenter Roeck
 <linux@...ck-us.net>, Juergen Gross <jgross@...e.com>, Jeremy Fitzhardinge
 <jeremy@...p.org>, linux-kernel@...r.kernel.org, linux-mm@...ck.org,
 kasan-dev@...glegroups.com, sparclinux@...r.kernel.org,
 xen-devel@...ts.xenproject.org, linuxppc-dev@...ts.ozlabs.org,
 linux-s390@...r.kernel.org
Subject: Re: [PATCH v1 0/4] mm: Fix apply_to_pte_range() vs lazy MMU mode

On Mon,  7 Apr 2025 17:11:26 +0200 Alexander Gordeev <agordeev@...ux.ibm.com> wrote:

> This series is an attempt to fix the violation of lazy MMU mode context
> requirement as described for arch_enter_lazy_mmu_mode():
> 
>     This mode can only be entered and left under the protection of
>     the page table locks for all page tables which may be modified.
> 
> On s390 if I make arch_enter_lazy_mmu_mode() -> preempt_enable() and
> arch_leave_lazy_mmu_mode() -> preempt_disable() I am getting this:
>
> ...
>

Could you please reorganize this into two series?  One series which
should be fast-tracked into 6.15-rcX and one series for 6.16-rc1?

And in the first series, please suggest whether its patches should be
backported into -stable and see if we can come up with suitable Fixes:
targets?

Thanks.