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V" , Andrea Arcangeli , "Kirill A . Shutemov" , Davidlohr Bueso , Prakash Sangappa , Andrew Morton , Mike Kravetz Subject: [PATCH 0/4] hugetlbfs: use hinode_rwsem for pmd sharing synchronization Date: Mon, 2 Nov 2020 16:28:37 -0800 Message-Id: <20201103002841.273161-1-mike.kravetz@oracle.com> X-Mailer: git-send-email 2.28.0 In-Reply-To: <20201026233150.371577-1-mike.kravetz@oracle.com> References: <20201026233150.371577-1-mike.kravetz@oracle.com> MIME-Version: 1.0 X-Proofpoint-Virus-Version: vendor=nai engine=6000 definitions=9793 signatures=668682 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 spamscore=0 suspectscore=0 mlxscore=0 bulkscore=0 malwarescore=0 mlxlogscore=875 phishscore=0 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2009150000 definitions=main-2011030000 X-Proofpoint-Virus-Version: vendor=nai engine=6000 definitions=9793 signatures=668682 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 bulkscore=0 phishscore=0 suspectscore=0 clxscore=1015 mlxlogscore=902 impostorscore=0 malwarescore=0 lowpriorityscore=0 adultscore=0 spamscore=0 priorityscore=1501 mlxscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2009150000 definitions=main-2011030001 Content-Transfer-Encoding: quoted-printable X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: The RFC series reverted all patches where i_mmap_rwsem was used for pmd sharing synchronization, and then added code to use hinode_rwsem. This series ends up with the same code in the end, but is structured as follows: - Revert the page fault/truncation race patch which depends on i_mmap_rws= em always being taken in page fault path. - Add hinode_rwsem to hugetlbfs specific inode and supporting routines. - Convert code from using i_mmap_rwsem for pmd sharing synchronization to using hinode_rwsem. - Add code to more robustly deal with page fault/truncation races. My hope is that this will be easier to review. Mike Kravetz (4): Revert hugetlbfs: Use i_mmap_rwsem to address page fault/truncate race hugetlbfs: add hinode_rwsem to hugetlb specific inode hugetlbfs: use hinode_rwsem for pmd sharing synchronization huegtlbfs: handle page fault/truncate races fs/hugetlbfs/inode.c | 105 +++++++++------- include/linux/fs.h | 15 --- include/linux/hugetlb.h | 129 ++++++++++++++++++-- mm/hugetlb.c | 262 ++++++++++++++++------------------------ mm/memory-failure.c | 34 ++---- mm/memory.c | 5 + mm/migrate.c | 34 +++--- mm/rmap.c | 21 ++-- mm/userfaultfd.c | 17 ++- 9 files changed, 334 insertions(+), 288 deletions(-) --=20 2.28.0