From: Peter Collingbourne <pcc@google.com>
To: Catalin Marinas <catalin.marinas@arm.com>
Cc: "Peter Collingbourne" <pcc@google.com>,
"Qun-wei Lin (林群崴)" <Qun-wei.Lin@mediatek.com>,
linux-arm-kernel@lists.infradead.org, linux-mm@kvack.org,
linux-kernel@vger.kernel.org,
"surenb@google.com" <surenb@google.com>,
"david@redhat.com" <david@redhat.com>,
"Chinwen Chang (張錦文)" <chinwen.chang@mediatek.com>,
"kasan-dev@googlegroups.com" <kasan-dev@googlegroups.com>,
"Kuan-Ying Lee (李冠穎)" <Kuan-Ying.Lee@mediatek.com>,
"Casper Li (李中榮)" <casper.li@mediatek.com>,
"gregkh@linuxfoundation.org" <gregkh@linuxfoundation.org>,
vincenzo.frascino@arm.com,
"Alexandru Elisei" <alexandru.elisei@arm.com>,
will@kernel.org, eugenis@google.com,
"Steven Price" <steven.price@arm.com>
Subject: [PATCH v3 0/3] mm: Fix bug affecting swapping in MTE tagged pages
Date: Tue, 16 May 2023 19:21:10 -0700 [thread overview]
Message-ID: <20230517022115.3033604-1-pcc@google.com> (raw)
This patch series reworks the logic that handles swapping in page
metadata to fix a reported bug [1] where metadata can sometimes not
be swapped in correctly after commit c145e0b47c77 ("mm: streamline COW
logic in do_swap_page()").
- Patch 1 fixes the bug itself, but still requires architectures
to restore metadata in both arch_swap_restore() and set_pte_at().
- Patch 2 makes it so that architectures only need to restore metadata
in arch_swap_restore().
- Patch 3 changes arm64 to remove support for restoring metadata
in set_pte_at().
[1] https://lore.kernel.org/all/5050805753ac469e8d727c797c2218a9d780d434.camel@mediatek.com/
v3:
- Added patch to call arch_swap_restore() from unuse_pte()
- Rebased onto arm64/for-next/fixes
v2:
- Call arch_swap_restore() directly instead of via arch_do_swap_page()
Peter Collingbourne (3):
mm: Call arch_swap_restore() from do_swap_page()
mm: Call arch_swap_restore() from unuse_pte()
arm64: mte: Simplify swap tag restoration logic
arch/arm64/include/asm/mte.h | 4 ++--
arch/arm64/include/asm/pgtable.h | 14 ++----------
arch/arm64/kernel/mte.c | 37 ++++++--------------------------
arch/arm64/mm/mteswap.c | 7 +++---
mm/memory.c | 7 ++++++
mm/swapfile.c | 7 ++++++
6 files changed, 28 insertions(+), 48 deletions(-)
--
2.40.1.606.ga4b1b128d6-goog
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WARNING: multiple messages have this Message-ID (diff)
From: Peter Collingbourne <pcc@google.com>
To: Catalin Marinas <catalin.marinas@arm.com>
Cc: "Peter Collingbourne" <pcc@google.com>,
"Qun-wei Lin (林群崴)" <Qun-wei.Lin@mediatek.com>,
linux-arm-kernel@lists.infradead.org, linux-mm@kvack.org,
linux-kernel@vger.kernel.org,
"surenb@google.com" <surenb@google.com>,
"david@redhat.com" <david@redhat.com>,
"Chinwen Chang (張錦文)" <chinwen.chang@mediatek.com>,
"kasan-dev@googlegroups.com" <kasan-dev@googlegroups.com>,
"Kuan-Ying Lee (李冠穎)" <Kuan-Ying.Lee@mediatek.com>,
"Casper Li (李中榮)" <casper.li@mediatek.com>,
"gregkh@linuxfoundation.org" <gregkh@linuxfoundation.org>,
vincenzo.frascino@arm.com,
"Alexandru Elisei" <alexandru.elisei@arm.com>,
will@kernel.org, eugenis@google.com,
"Steven Price" <steven.price@arm.com>
Subject: [PATCH v3 0/3] mm: Fix bug affecting swapping in MTE tagged pages
Date: Tue, 16 May 2023 19:21:10 -0700 [thread overview]
Message-ID: <20230517022115.3033604-1-pcc@google.com> (raw)
This patch series reworks the logic that handles swapping in page
metadata to fix a reported bug [1] where metadata can sometimes not
be swapped in correctly after commit c145e0b47c77 ("mm: streamline COW
logic in do_swap_page()").
- Patch 1 fixes the bug itself, but still requires architectures
to restore metadata in both arch_swap_restore() and set_pte_at().
- Patch 2 makes it so that architectures only need to restore metadata
in arch_swap_restore().
- Patch 3 changes arm64 to remove support for restoring metadata
in set_pte_at().
[1] https://lore.kernel.org/all/5050805753ac469e8d727c797c2218a9d780d434.camel@mediatek.com/
v3:
- Added patch to call arch_swap_restore() from unuse_pte()
- Rebased onto arm64/for-next/fixes
v2:
- Call arch_swap_restore() directly instead of via arch_do_swap_page()
Peter Collingbourne (3):
mm: Call arch_swap_restore() from do_swap_page()
mm: Call arch_swap_restore() from unuse_pte()
arm64: mte: Simplify swap tag restoration logic
arch/arm64/include/asm/mte.h | 4 ++--
arch/arm64/include/asm/pgtable.h | 14 ++----------
arch/arm64/kernel/mte.c | 37 ++++++--------------------------
arch/arm64/mm/mteswap.c | 7 +++---
mm/memory.c | 7 ++++++
mm/swapfile.c | 7 ++++++
6 files changed, 28 insertions(+), 48 deletions(-)
--
2.40.1.606.ga4b1b128d6-goog
next reply other threads:[~2023-05-17 2:21 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-05-17 2:21 Peter Collingbourne [this message]
2023-05-17 2:21 ` [PATCH v3 0/3] mm: Fix bug affecting swapping in MTE tagged pages Peter Collingbourne
2023-05-17 2:21 ` [PATCH v3 1/3] mm: Call arch_swap_restore() from do_swap_page() Peter Collingbourne
2023-05-17 2:21 ` Peter Collingbourne
2023-05-17 3:40 ` Huang, Ying
2023-05-17 3:40 ` Huang, Ying
2023-05-17 8:37 ` David Hildenbrand
2023-05-17 8:37 ` David Hildenbrand
2023-05-17 14:57 ` Steven Price
2023-05-17 14:57 ` Steven Price
2023-05-19 16:39 ` Catalin Marinas
2023-05-19 16:39 ` Catalin Marinas
2023-05-17 2:21 ` [PATCH v3 2/3] mm: Call arch_swap_restore() from unuse_pte() Peter Collingbourne
2023-05-17 2:21 ` Peter Collingbourne
2023-05-17 8:37 ` David Hildenbrand
2023-05-17 8:37 ` David Hildenbrand
2023-05-17 14:58 ` Steven Price
2023-05-17 14:58 ` Steven Price
2023-05-19 16:42 ` Catalin Marinas
2023-05-19 16:42 ` Catalin Marinas
2023-05-17 2:21 ` [PATCH v3 3/3] arm64: mte: Simplify swap tag restoration logic Peter Collingbourne
2023-05-17 2:21 ` Peter Collingbourne
2023-05-17 14:59 ` Steven Price
2023-05-17 14:59 ` Steven Price
2023-05-19 16:54 ` Catalin Marinas
2023-05-19 16:54 ` Catalin Marinas
2023-05-22 23:45 ` Peter Collingbourne
2023-05-22 23:45 ` Peter Collingbourne
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