diff options
| author | Steve French <stfrench@microsoft.com> | 2021-04-24 21:46:23 -0500 |
|---|---|---|
| committer | Steve French <stfrench@microsoft.com> | 2021-04-25 23:59:08 -0500 |
| commit | b8d64f8ced62f9ace9d25c338be1043b8367dd34 (patch) | |
| tree | dcdda7c0b18b6d74bc0ea6ee75f88ec95d16acc2 /fs/cifs/cifsfs.c | |
| parent | 423333bcba248c6b65e7eac1a0b8eef57c9eac72 (diff) | |
smb3: add rasize mount parameter to improve readahead performance
In some cases readahead of more than the read size can help
(to allow parallel i/o of read ahead which can improve performance).
Ceph introduced a mount parameter "rasize" to allow controlling this.
Add mount parameter "rasize" to allow control of amount of readahead
requested of the server. If rasize not set, rasize defaults to
negotiated rsize as before.
Reviewed-by: Shyam Prasad N <sprasad@microsoft.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
Diffstat (limited to 'fs/cifs/cifsfs.c')
| -rw-r--r-- | fs/cifs/cifsfs.c | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/fs/cifs/cifsfs.c b/fs/cifs/cifsfs.c index 39f4889a036b..5f2c139143a7 100644 --- a/fs/cifs/cifsfs.c +++ b/fs/cifs/cifsfs.c @@ -217,8 +217,11 @@ cifs_read_super(struct super_block *sb) rc = super_setup_bdi(sb); if (rc) goto out_no_root; - /* tune readahead according to rsize */ - sb->s_bdi->ra_pages = cifs_sb->ctx->rsize / PAGE_SIZE; + /* tune readahead according to rsize if readahead size not set on mount */ + if (cifs_sb->ctx->rasize) + sb->s_bdi->ra_pages = cifs_sb->ctx->rasize / PAGE_SIZE; + else + sb->s_bdi->ra_pages = cifs_sb->ctx->rsize / PAGE_SIZE; sb->s_blocksize = CIFS_MAX_MSGSIZE; sb->s_blocksize_bits = 14; /* default 2**14 = CIFS_MAX_MSGSIZE */ @@ -649,6 +652,8 @@ cifs_show_options(struct seq_file *s, struct dentry *root) seq_printf(s, ",rsize=%u", cifs_sb->ctx->rsize); seq_printf(s, ",wsize=%u", cifs_sb->ctx->wsize); seq_printf(s, ",bsize=%u", cifs_sb->ctx->bsize); + if (cifs_sb->ctx->rasize) + seq_printf(s, ",rasize=%u", cifs_sb->ctx->rasize); if (tcon->ses->server->min_offload) seq_printf(s, ",esize=%u", tcon->ses->server->min_offload); seq_printf(s, ",echo_interval=%lu", |