From mboxrd@z Thu Jan 1 00:00:00 1970 From: ira.weiny@intel.com Date: Fri, 09 Oct 2020 19:50:09 +0000 Subject: [PATCH RFC PKS/PMEM 34/58] fs/erofs: Utilize new kmap_thread() Message-Id: <20201009195033.3208459-35-ira.weiny@intel.com> List-Id: References: <20201009195033.3208459-1-ira.weiny@intel.com> In-Reply-To: <20201009195033.3208459-1-ira.weiny@intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: Andrew Morton , Thomas Gleixner , Ingo Molnar , Borislav Petkov , Andy Lutomirski , Peter Zijlstra Cc: linux-aio@kvack.org, linux-efi@vger.kernel.org, kvm@vger.kernel.org, linux-doc@vger.kernel.org, linux-mmc@vger.kernel.org, Dave Hansen , dri-devel@lists.freedesktop.org, linux-mm@kvack.org, target-devel@vger.kernel.org, linux-mtd@lists.infradead.org, linux-kselftest@vger.kernel.org, samba-technical@lists.samba.org, Ira Weiny , ceph-devel@vger.kernel.org, drbd-dev@lists.linbit.com, devel@driverdev.osuosl.org, linux-cifs@vger.kernel.org, linux-nilfs@vger.kernel.org, linux-scsi@vger.kernel.org, linux-nvdimm@lists.01.org, linux-rdma@vger.kernel.org, x86@kernel.org, amd-gfx@lists.freedesktop.org, linux-afs@lists.infradead.org, cluster-devel@redhat.com, linux-cachefs@redhat.com, intel-wired-lan@lists.osuosl.org, xen-devel@lists.xenproject.org, Gao Xiang , linux-ext4@vger.kernel.org, Fenghua Yu , ecryptfs@vger.kernel.org, linux-um@lists.infradead.org, intel-gfx@lists.freedesktop.org, Chao Yu , linux-erofs@lists.ozlabs.org, reiserfs-devel@vger.kernel.org, linux-block@vger.kernel.org, linux-bcache@vger.kernel.org, Dan Williams , io-uring@vger.kernel.org, linux-nfs@vger.kernel.org, linux-ntfs-dev@lists.sourceforge.net, netdev@vger.kernel.org, kexec@lists.infradead.org, linux-kernel@vger.kernel.org, linux-f2fs-devel@lists.sourceforge.net, linux-fsdevel@vger.kernel.org, bpf@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-btrfs@vger.kernel.org From: Ira Weiny The kmap() calls in this FS are localized to a single thread. To avoid the over head of global PKRS updates use the new kmap_thread() call. Cc: Gao Xiang Cc: Chao Yu Signed-off-by: Ira Weiny --- fs/erofs/super.c | 4 ++-- fs/erofs/xattr.c | 4 ++-- 2 files changed, 4 insertions(+), 4 deletions(-) diff --git a/fs/erofs/super.c b/fs/erofs/super.c index ddaa516c008a..41696b60f1b3 100644 --- a/fs/erofs/super.c +++ b/fs/erofs/super.c @@ -139,7 +139,7 @@ static int erofs_read_superblock(struct super_block *sb) sbi = EROFS_SB(sb); - data = kmap(page); + data = kmap_thread(page); dsb = (struct erofs_super_block *)(data + EROFS_SUPER_OFFSET); ret = -EINVAL; @@ -189,7 +189,7 @@ static int erofs_read_superblock(struct super_block *sb) } ret = 0; out: - kunmap(page); + kunmap_thread(page); put_page(page); return ret; } diff --git a/fs/erofs/xattr.c b/fs/erofs/xattr.c index c8c381eadcd6..1771baa99d77 100644 --- a/fs/erofs/xattr.c +++ b/fs/erofs/xattr.c @@ -20,7 +20,7 @@ static inline void xattr_iter_end(struct xattr_iter *it, bool atomic) { /* the only user of kunmap() is 'init_inode_xattrs' */ if (!atomic) - kunmap(it->page); + kunmap_thread(it->page); else kunmap_atomic(it->kaddr); @@ -96,7 +96,7 @@ static int init_inode_xattrs(struct inode *inode) } /* read in shared xattr array (non-atomic, see kmalloc below) */ - it.kaddr = kmap(it.page); + it.kaddr = kmap_thread(it.page); atomic_map = false; ih = (struct erofs_xattr_ibody_header *)(it.kaddr + it.ofs); -- 2.28.0.rc0.12.gb6a658bd00c9