diff options
| -rw-r--r-- | fs/btrfs/ctree.h | 6 | ||||
| -rw-r--r-- | fs/btrfs/disk-io.c | 13 | ||||
| -rw-r--r-- | fs/btrfs/super.c | 2 |
3 files changed, 12 insertions, 9 deletions
diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h index 0a61dff27f57..02870c1bb68a 100644 --- a/fs/btrfs/ctree.h +++ b/fs/btrfs/ctree.h @@ -791,6 +791,12 @@ enum { /* Indicate that the cleaner thread is awake and doing something. */ BTRFS_FS_CLEANER_RUNNING, + + /* + * The checksumming has an optimized version and is considered fast, + * so we don't need to offload checksums to workqueues. + */ + BTRFS_FS_CSUM_IMPL_FAST, }; struct btrfs_fs_info { diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c index deb74a8c191a..024c9fadeaeb 100644 --- a/fs/btrfs/disk-io.c +++ b/fs/btrfs/disk-io.c @@ -40,10 +40,6 @@ #include "tree-checker.h" #include "ref-verify.h" -#ifdef CONFIG_X86 -#include <asm/cpufeature.h> -#endif - #define BTRFS_SUPER_FLAG_SUPP (BTRFS_HEADER_FLAG_WRITTEN |\ BTRFS_HEADER_FLAG_RELOC |\ BTRFS_SUPER_FLAG_ERROR |\ @@ -873,14 +869,13 @@ static blk_status_t btree_submit_bio_start(void *private_data, struct bio *bio, return btree_csum_one_bio(bio); } -static int check_async_write(struct btrfs_inode *bi) +static int check_async_write(struct btrfs_fs_info *fs_info, + struct btrfs_inode *bi) { if (atomic_read(&bi->sync_writers)) return 0; -#ifdef CONFIG_X86 - if (static_cpu_has(X86_FEATURE_XMM4_2)) + if (test_bit(BTRFS_FS_CSUM_IMPL_FAST, &fs_info->flags)) return 0; -#endif return 1; } @@ -889,7 +884,7 @@ static blk_status_t btree_submit_bio_hook(struct inode *inode, struct bio *bio, unsigned long bio_flags) { struct btrfs_fs_info *fs_info = btrfs_sb(inode->i_sb); - int async = check_async_write(BTRFS_I(inode)); + int async = check_async_write(fs_info, BTRFS_I(inode)); blk_status_t ret; if (bio_op(bio) != REQ_OP_WRITE) { diff --git a/fs/btrfs/super.c b/fs/btrfs/super.c index 0645ec428b4f..db410c6b5f5f 100644 --- a/fs/btrfs/super.c +++ b/fs/btrfs/super.c @@ -1553,6 +1553,8 @@ static struct dentry *btrfs_mount_root(struct file_system_type *fs_type, } else { snprintf(s->s_id, sizeof(s->s_id), "%pg", bdev); btrfs_sb(s)->bdev_holder = fs_type; + if (!strstr(crc32c_impl(), "generic")) + set_bit(BTRFS_FS_CSUM_IMPL_FAST, &fs_info->flags); error = btrfs_fill_super(s, fs_devices, data); } if (!error) |