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| author |   Chuck Lever <chuck.lever@oracle.com> | 2021-10-04 10:10:16 -0400 |
|---|---|---|
| committer |   Trond Myklebust <trond.myklebust@hammerspace.com> | 2021-10-10 11:05:54 +0200 |
| commit | 110cb2d2f9326030f13b7ec85d6d482934ea5462 (patch) | |
| tree | ca5710abdebc4da93d2593c872c994881158015f /fs/nfs/write.c | |
| parent | SUNRPC: Per-rpc_clnt task PIDs (diff) | |
| download | linux-dev-110cb2d2f9326030f13b7ec85d6d482934ea5462.tar.xz linux-dev-110cb2d2f9326030f13b7ec85d6d482934ea5462.zip | |
NFS: Instrument i_size_write()
Generate a trace event whenever the NFS client modifies the size of
a file. These new events aid troubleshooting workloads that trigger
races around size updates.
There are four new trace points, all named nfs_size_something so
they are easy to grep for or enable as a group with a single glob.
Size updated on the server:
kworker/u24:10-194 [010] 369.939174: nfs_size_update: fileid=00:28:2 fhandle=0x36fbbe51 version=1752899344277980615 cursize=250471 newsize=172083
Server-side size update reported via NFSv3 WCC attributes:
fsx-1387 [006] 380.760686: nfs_size_wcc: fileid=00:28:2 fhandle=0x36fbbe51 version=1752899355909932456 cursize=146792 newsize=171216
File has been truncated locally:
fsx-1387 [007] 369.437421: nfs_size_truncate: fileid=00:28:2 fhandle=0x36fbbe51 version=1752899231200117272 cursize=215244 newsize=0
File has been extended locally:
fsx-1387 [007] 369.439213: nfs_size_grow: fileid=00:28:2 fhandle=0x36fbbe51 version=1752899343704248410 cursize=258048 newsize=262144
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
Diffstat (limited to '')
| -rw-r--r-- | fs/nfs/write.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/fs/nfs/write.c b/fs/nfs/write.c index 773ea2c8504d..b89d5ef3af0e 100644 --- a/fs/nfs/write.c +++ b/fs/nfs/write.c @@ -288,6 +288,7 @@ static void nfs_grow_file(struct page *page, unsigned int offset, unsigned int c end = page_file_offset(page) + ((loff_t)offset+count); if (i_size >= end) goto out; + trace_nfs_size_grow(inode, end); i_size_write(inode, end); NFS_I(inode)->cache_validity &= ~NFS_INO_INVALID_SIZE; nfs_inc_stats(inode, NFSIOS_EXTENDWRITE); |