From: David Stevens <stevensd@chromium.org>
To: linux-mm@kvack.org, Andrew Morton <akpm@linux-foundation.org>
Cc: Peter Xu <peterx@redhat.com>,
Matthew Wilcox <willy@infradead.org>,
"Kirill A . Shutemov" <kirill@shutemov.name>,
Yang Shi <shy828301@gmail.com>,
David Hildenbrand <david@redhat.com>,
Hugh Dickins <hughd@google.com>, Jiaqi Yan <jiaqiyan@google.com>,
linux-kernel@vger.kernel.org,
David Stevens <stevensd@chromium.org>
Subject: [PATCH v5 0/3] mm/khugepaged: fix khugepaged+shmem races
Date: Tue, 7 Mar 2023 14:20:33 +0900 [thread overview]
Message-ID: <20230307052036.1520708-1-stevensd@google.com> (raw)
From: David Stevens <stevensd@chromium.org>
Fix two races in khugepaged+shmem that cause issues with userfaultfd and
lseek, respectively.
v4 -> v5:
- Rebase on mm-unstable (9caa15b8a499)
- Gather acks
v3 -> v4:
- Base changes on mm-everything (fba720cb4dc0)
- Add patch to refactor error handling control flow in collapse_file
- Rebase userfaultfd patch with no significant logic changes
- Different approach for fixing lseek race
v2 -> v3:
- Use XA_RETRY_ENTRY to synchronize with reads from the page cache
under the RCU read lock in userfaultfd fix
- Add patch to fix lseek race
v1 -> v2:
- Different approach for userfaultfd fix
David Stevens (3):
mm/khugepaged: refactor collapse_file control flow
mm/khugepaged: skip shmem with userfaultfd
mm/khugepaged: maintain page cache uptodate flag
include/trace/events/huge_memory.h | 3 +-
mm/khugepaged.c | 259 ++++++++++++++++-------------
2 files changed, 142 insertions(+), 120 deletions(-)
--
2.40.0.rc0.216.gc4246ad0f0-goog
next reply other threads:[~2023-03-07 5:21 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-03-07 5:20 David Stevens [this message]
2023-03-07 5:20 ` [PATCH v5 1/3] mm/khugepaged: refactor collapse_file control flow David Stevens
2023-03-23 19:51 ` Hugh Dickins
2023-03-07 5:20 ` [PATCH v5 2/3] mm/khugepaged: skip shmem with userfaultfd David Stevens
2023-03-23 19:48 ` Hugh Dickins
2023-03-24 5:34 ` David Stevens
2023-03-28 15:48 ` Peter Xu
2023-03-07 5:20 ` [PATCH v5 3/3] mm/khugepaged: maintain page cache uptodate flag David Stevens
2023-03-23 19:07 ` Hugh Dickins
2023-03-23 21:56 ` Matthew Wilcox
2023-03-23 22:28 ` Song Liu
2023-03-24 1:56 ` Hugh Dickins
2023-03-24 3:30 ` Matthew Wilcox
2023-03-24 6:03 ` Song Liu
2023-03-24 13:31 ` Matthew Wilcox
2023-03-29 16:53 ` Song Liu
2023-03-28 9:48 ` David Stevens
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