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NFS: Add event tracing for generic NFS events

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Add tracepoints for inode attribute updates, attribute revalidation,
writeback start/end fsync start/end, attribute change start/end,
permission check start/end.

The intention is to enable performance tracing using 'perf'as well as
improving debugging.

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
This commit is contained in:
Trond Myklebust 2013-08-19 18:59:33 -04:00
parent 1264a2f053
commit f4ce1299b3
7 changed files with 231 additions and 11 deletions
Download patch file Download diff file Expand all files Collapse all files

15
fs/nfs/write.c
View file

@ -31,6 +31,8 @@
#include "fscache.h"
#include "pnfs.h"
#include "nfstrace.h"
#define NFSDBG_FACILITY NFSDBG_PAGECACHE
#define MIN_POOL_WRITE (32)
@ -1732,8 +1734,14 @@ int nfs_wb_all(struct inode *inode)
.range_start = 0,
.range_end = LLONG_MAX,
};
int ret;
return sync_inode(inode, &wbc);
trace_nfs_writeback_inode_enter(inode);
ret = sync_inode(inode, &wbc);
trace_nfs_writeback_inode_exit(inode, ret);
return ret;
}
EXPORT_SYMBOL_GPL(nfs_wb_all);
@ -1781,6 +1789,8 @@ int nfs_wb_page(struct inode *inode, struct page *page)
};
int ret;
trace_nfs_writeback_page_enter(inode);
for (;;) {
wait_on_page_writeback(page);
if (clear_page_dirty_for_io(page)) {
@ -1789,14 +1799,15 @@ int nfs_wb_page(struct inode *inode, struct page *page)
goto out_error;
continue;
}
ret = 0;
if (!PagePrivate(page))
break;
ret = nfs_commit_inode(inode, FLUSH_SYNC);
if (ret < 0)
goto out_error;
}
return 0;
out_error:
trace_nfs_writeback_page_exit(inode, ret);
return ret;
}