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authorAndy Adamson <andros@netapp.com>2012-05-24 19:13:24 +0200
committerTrond Myklebust <Trond.Myklebust@netapp.com>2012-05-24 22:15:48 +0200
commit2701d086dbfca03b2d28b25c6dc11dd78d0e26ad (patch)
tree69f81dd2a979600cd3ff4f1861c6d7ef5c25b1ed
parentNFSv4.1 cache mdsthreshold values on OPEN (diff)
downloadlinux-2701d086dbfca03b2d28b25c6dc11dd78d0e26ad.tar.xz
linux-2701d086dbfca03b2d28b25c6dc11dd78d0e26ad.zip
NFSv4.1 add nfs_inode book keeping for mdsthreshold
Keep track of the number of bytes read or written via buffered, direct, and mem-mapped i/o for use by mdsthreshold size_io hints. Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
-rw-r--r--fs/nfs/direct.c2
-rw-r--r--fs/nfs/file.c1
-rw-r--r--fs/nfs/inode.c2
-rw-r--r--fs/nfs/pnfs.c3
-rw-r--r--fs/nfs/read.c2
-rw-r--r--include/linux/nfs_fs.h3
6 files changed, 13 insertions, 0 deletions
diff --git a/fs/nfs/direct.c b/fs/nfs/direct.c
index c47a46eaf905..23d170bc44f4 100644
--- a/fs/nfs/direct.c
+++ b/fs/nfs/direct.c
@@ -447,6 +447,7 @@ static ssize_t nfs_direct_read(struct kiocb *iocb, const struct iovec *iov,
result = nfs_direct_read_schedule_iovec(dreq, iov, nr_segs, pos);
if (!result)
result = nfs_direct_wait(dreq);
+ NFS_I(inode)->read_io += result;
out_release:
nfs_direct_req_release(dreq);
out:
@@ -785,6 +786,7 @@ static ssize_t nfs_direct_write_schedule_iovec(struct nfs_direct_req *dreq,
pos += vec->iov_len;
}
nfs_pageio_complete(&desc);
+ NFS_I(dreq->inode)->write_io += desc.pg_bytes_written;
/*
* If no bytes were started, return the error, and let the
diff --git a/fs/nfs/file.c b/fs/nfs/file.c
index 8eda8a6644c3..56311ca5f9f8 100644
--- a/fs/nfs/file.c
+++ b/fs/nfs/file.c
@@ -424,6 +424,7 @@ static int nfs_write_end(struct file *file, struct address_space *mapping,
if (status < 0)
return status;
+ NFS_I(mapping->host)->write_io += copied;
return copied;
}
diff --git a/fs/nfs/inode.c b/fs/nfs/inode.c
index 889f7e5e92e1..a6f5fbbe9b9c 100644
--- a/fs/nfs/inode.c
+++ b/fs/nfs/inode.c
@@ -323,6 +323,8 @@ nfs_fhget(struct super_block *sb, struct nfs_fh *fh, struct nfs_fattr *fattr)
inode->i_gid = -2;
inode->i_blocks = 0;
memset(nfsi->cookieverf, 0, sizeof(nfsi->cookieverf));
+ nfsi->write_io = 0;
+ nfsi->read_io = 0;
nfsi->read_cache_jiffies = fattr->time_start;
nfsi->attr_gencount = fattr->gencount;
diff --git a/fs/nfs/pnfs.c b/fs/nfs/pnfs.c
index cbcb6aea58a3..6620606f2687 100644
--- a/fs/nfs/pnfs.c
+++ b/fs/nfs/pnfs.c
@@ -395,6 +395,9 @@ mark_matching_lsegs_invalid(struct pnfs_layout_hdr *lo,
dprintk("%s:Begin lo %p\n", __func__, lo);
if (list_empty(&lo->plh_segs)) {
+ /* Reset MDS Threshold I/O counters */
+ NFS_I(lo->plh_inode)->write_io = 0;
+ NFS_I(lo->plh_inode)->read_io = 0;
if (!test_and_set_bit(NFS_LAYOUT_DESTROYED, &lo->plh_flags))
put_layout_hdr_locked(lo);
return 0;
diff --git a/fs/nfs/read.c b/fs/nfs/read.c
index 2cfdd7785411..86ced7836214 100644
--- a/fs/nfs/read.c
+++ b/fs/nfs/read.c
@@ -152,6 +152,7 @@ int nfs_readpage_async(struct nfs_open_context *ctx, struct inode *inode,
nfs_pageio_init_read(&pgio, inode, &nfs_async_read_completion_ops);
nfs_pageio_add_request(&pgio, new);
nfs_pageio_complete(&pgio);
+ NFS_I(inode)->read_io += pgio.pg_bytes_written;
return 0;
}
@@ -656,6 +657,7 @@ int nfs_readpages(struct file *filp, struct address_space *mapping,
ret = read_cache_pages(mapping, pages, readpage_async_filler, &desc);
nfs_pageio_complete(&pgio);
+ NFS_I(inode)->read_io += pgio.pg_bytes_written;
npages = (pgio.pg_bytes_written + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT;
nfs_add_stats(inode, NFSIOS_READPAGES, npages);
read_complete:
diff --git a/include/linux/nfs_fs.h b/include/linux/nfs_fs.h
index ce910cb7d761..b23cfc120edb 100644
--- a/include/linux/nfs_fs.h
+++ b/include/linux/nfs_fs.h
@@ -202,6 +202,9 @@ struct nfs_inode {
/* pNFS layout information */
struct pnfs_layout_hdr *layout;
#endif /* CONFIG_NFS_V4*/
+ /* how many bytes have been written/read and how many bytes queued up */
+ __u64 write_io;
+ __u64 read_io;
#ifdef CONFIG_NFS_FSCACHE
struct fscache_cookie *fscache;
#endif