From mboxrd@z Thu Jan 1 00:00:00 1970 From: ira.weiny@intel.com Date: Fri, 09 Oct 2020 19:49:53 +0000 Subject: [PATCH RFC PKS/PMEM 18/58] fs/hfs: Utilize new kmap_thread() Message-Id: <20201009195033.3208459-19-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, linux-ext4@vger.kernel.org, Fenghua Yu , linux-um@lists.infradead.org, intel-gfx@lists.freedesktop.org, ecryptfs@vger.kernel.org, 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. Signed-off-by: Ira Weiny --- fs/hfs/bnode.c | 14 +++++++------- fs/hfs/btree.c | 20 ++++++++++---------- 2 files changed, 17 insertions(+), 17 deletions(-) diff --git a/fs/hfs/bnode.c b/fs/hfs/bnode.c index b63a4df7327b..8b4d02576405 100644 --- a/fs/hfs/bnode.c +++ b/fs/hfs/bnode.c @@ -23,8 +23,8 @@ void hfs_bnode_read(struct hfs_bnode *node, void *buf, off += node->page_offset; page = node->page[0]; - memcpy(buf, kmap(page) + off, len); - kunmap(page); + memcpy(buf, kmap_thread(page) + off, len); + kunmap_thread(page); } u16 hfs_bnode_read_u16(struct hfs_bnode *node, int off) @@ -108,9 +108,9 @@ void hfs_bnode_copy(struct hfs_bnode *dst_node, int dst, src_page = src_node->page[0]; dst_page = dst_node->page[0]; - memcpy(kmap(dst_page) + dst, kmap(src_page) + src, len); - kunmap(src_page); - kunmap(dst_page); + memcpy(kmap_thread(dst_page) + dst, kmap_thread(src_page) + src, len); + kunmap_thread(src_page); + kunmap_thread(dst_page); set_page_dirty(dst_page); } @@ -125,9 +125,9 @@ void hfs_bnode_move(struct hfs_bnode *node, int dst, int src, int len) src += node->page_offset; dst += node->page_offset; page = node->page[0]; - ptr = kmap(page); + ptr = kmap_thread(page); memmove(ptr + dst, ptr + src, len); - kunmap(page); + kunmap_thread(page); set_page_dirty(page); } diff --git a/fs/hfs/btree.c b/fs/hfs/btree.c index 19017d296173..bd4a6d35e361 100644 --- a/fs/hfs/btree.c +++ b/fs/hfs/btree.c @@ -80,7 +80,7 @@ struct hfs_btree *hfs_btree_open(struct super_block *sb, u32 id, btree_keycmp ke goto free_inode; /* Load the header */ - head = (struct hfs_btree_header_rec *)(kmap(page) + sizeof(struct hfs_bnode_desc)); + head = (struct hfs_btree_header_rec *)(kmap_thread(page) + sizeof(struct hfs_bnode_desc)); tree->root = be32_to_cpu(head->root); tree->leaf_count = be32_to_cpu(head->leaf_count); tree->leaf_head = be32_to_cpu(head->leaf_head); @@ -119,7 +119,7 @@ struct hfs_btree *hfs_btree_open(struct super_block *sb, u32 id, btree_keycmp ke tree->node_size_shift = ffs(size) - 1; tree->pages_per_bnode = (tree->node_size + PAGE_SIZE - 1) >> PAGE_SHIFT; - kunmap(page); + kunmap_thread(page); put_page(page); return tree; @@ -268,7 +268,7 @@ struct hfs_bnode *hfs_bmap_alloc(struct hfs_btree *tree) off += node->page_offset; pagep = node->page + (off >> PAGE_SHIFT); - data = kmap(*pagep); + data = kmap_thread(*pagep); off &= ~PAGE_MASK; idx = 0; @@ -281,7 +281,7 @@ struct hfs_bnode *hfs_bmap_alloc(struct hfs_btree *tree) idx += i; data[off] |= m; set_page_dirty(*pagep); - kunmap(*pagep); + kunmap_thread(*pagep); tree->free_nodes--; mark_inode_dirty(tree->inode); hfs_bnode_put(node); @@ -290,14 +290,14 @@ struct hfs_bnode *hfs_bmap_alloc(struct hfs_btree *tree) } } if (++off >= PAGE_SIZE) { - kunmap(*pagep); - data = kmap(*++pagep); + kunmap_thread(*pagep); + data = kmap_thread(*++pagep); off = 0; } idx += 8; len--; } - kunmap(*pagep); + kunmap_thread(*pagep); nidx = node->next; if (!nidx) { printk(KERN_DEBUG "create new bmap node...\n"); @@ -313,7 +313,7 @@ struct hfs_bnode *hfs_bmap_alloc(struct hfs_btree *tree) off = off16; off += node->page_offset; pagep = node->page + (off >> PAGE_SHIFT); - data = kmap(*pagep); + data = kmap_thread(*pagep); off &= ~PAGE_MASK; } } @@ -360,7 +360,7 @@ void hfs_bmap_free(struct hfs_bnode *node) } off += node->page_offset + nidx / 8; page = node->page[off >> PAGE_SHIFT]; - data = kmap(page); + data = kmap_thread(page); off &= ~PAGE_MASK; m = 1 << (~nidx & 7); byte = data[off]; @@ -373,7 +373,7 @@ void hfs_bmap_free(struct hfs_bnode *node) } data[off] = byte & ~m; set_page_dirty(page); - kunmap(page); + kunmap_thread(page); hfs_bnode_put(node); tree->free_nodes++; mark_inode_dirty(tree->inode); -- 2.28.0.rc0.12.gb6a658bd00c9