The patch titled
Subject: nilfs2: add tracepoints for analyzing reading and writing metadata files
has been added to the -mm tree. Its filename is
nilfs2-add-tracepoints-for-analyzing-reading-and-writing-metadata-files.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/nilfs2-add-tracepoints-for-analyzing-reading-and-writing-metadata-files.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/nilfs2-add-tracepoints-for-analyzing-reading-and-writing-metadata-files.patch
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*** Remember to use Documentation/SubmitChecklist when testing your code ***
The -mm tree is included into linux-next and is updated
there every 3-4 working days
------------------------------------------------------
From: Hitoshi Mitake <mitake.hitoshi@xxxxxxxxxxxxx>
Subject: nilfs2: add tracepoints for analyzing reading and writing metadata files
This patch adds tracepoints for analyzing requests of reading and writing
metadata files. The tracepoints cover every in-place mdt files (cpfile,
sufile, and datfile).
Example of tracing mdt_insert_new_block():
cp-14635 [000] ...1 30598.199309: nilfs2_mdt_insert_new_block: inode = ffff88022a8d0178 ino = 3 block = 155
cp-14635 [000] ...1 30598.199520: nilfs2_mdt_insert_new_block: inode = ffff88022a8d0178 ino = 3 block = 5
cp-14635 [000] ...1 30598.200828: nilfs2_mdt_insert_new_block: inode = ffff88022a8d0178 ino = 3 block = 253
Signed-off-by: Hitoshi Mitake <mitake.hitoshi@xxxxxxxxxxxxx>
Signed-off-by: Ryusuke Konishi <konishi.ryusuke@xxxxxxxxxxxxx>
Cc: Steven Rostedt <rostedt@xxxxxxxxxxx>
Cc: TK Kato <TK.Kato@xxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
fs/nilfs2/mdt.c | 6 +++
include/trace/events/nilfs2.h | 54 ++++++++++++++++++++++++++++++++
2 files changed, 60 insertions(+)
diff -puN fs/nilfs2/mdt.c~nilfs2-add-tracepoints-for-analyzing-reading-and-writing-metadata-files fs/nilfs2/mdt.c
--- a/fs/nilfs2/mdt.c~nilfs2-add-tracepoints-for-analyzing-reading-and-writing-metadata-files
+++ a/fs/nilfs2/mdt.c
@@ -33,6 +33,7 @@
#include "page.h"
#include "mdt.h"
+#include <trace/events/nilfs2.h>
#define NILFS_MDT_MAX_RA_BLOCKS (16 - 1)
@@ -68,6 +69,9 @@ nilfs_mdt_insert_new_block(struct inode
set_buffer_uptodate(bh);
mark_buffer_dirty(bh);
nilfs_mdt_mark_dirty(inode);
+
+ trace_nilfs2_mdt_insert_new_block(inode, inode->i_ino, block);
+
return 0;
}
@@ -158,6 +162,8 @@ nilfs_mdt_submit_block(struct inode *ino
get_bh(bh);
submit_bh(mode, bh);
ret = 0;
+
+ trace_nilfs2_mdt_submit_block(inode, inode->i_ino, blkoff, mode);
out:
get_bh(bh);
*out_bh = bh;
diff -puN include/trace/events/nilfs2.h~nilfs2-add-tracepoints-for-analyzing-reading-and-writing-metadata-files include/trace/events/nilfs2.h
--- a/include/trace/events/nilfs2.h~nilfs2-add-tracepoints-for-analyzing-reading-and-writing-metadata-files
+++ a/include/trace/events/nilfs2.h
@@ -162,6 +162,60 @@ TRACE_EVENT(nilfs2_segment_usage_freed,
__entry->segnum)
);
+TRACE_EVENT(nilfs2_mdt_insert_new_block,
+ TP_PROTO(struct inode *inode,
+ unsigned long ino,
+ unsigned long block),
+
+ TP_ARGS(inode, ino, block),
+
+ TP_STRUCT__entry(
+ __field(struct inode *, inode)
+ __field(unsigned long, ino)
+ __field(unsigned long, block)
+ ),
+
+ TP_fast_assign(
+ __entry->inode = inode;
+ __entry->ino = ino;
+ __entry->block = block;
+ ),
+
+ TP_printk("inode = %p ino = %lu block = %lu",
+ __entry->inode,
+ __entry->ino,
+ __entry->block)
+);
+
+TRACE_EVENT(nilfs2_mdt_submit_block,
+ TP_PROTO(struct inode *inode,
+ unsigned long ino,
+ unsigned long blkoff,
+ int mode),
+
+ TP_ARGS(inode, ino, blkoff, mode),
+
+ TP_STRUCT__entry(
+ __field(struct inode *, inode)
+ __field(unsigned long, ino)
+ __field(unsigned long, blkoff)
+ __field(int, mode)
+ ),
+
+ TP_fast_assign(
+ __entry->inode = inode;
+ __entry->ino = ino;
+ __entry->blkoff = blkoff;
+ __entry->mode = mode;
+ ),
+
+ TP_printk("inode = %p ino = %lu blkoff = %lu mode = %x",
+ __entry->inode,
+ __entry->ino,
+ __entry->blkoff,
+ __entry->mode)
+);
+
#endif /* _TRACE_NILFS2_H */
/* This part must be outside protection */
_
Patches currently in -mm which might be from mitake.hitoshi@xxxxxxxxxxxxx are
nilfs2-add-a-tracepoint-for-tracking-stage-transition-of-segment-construction.patch
nilfs2-add-a-tracepoint-for-transaction-events.patch
nilfs2-add-tracepoints-for-analyzing-sufile-manipulation.patch
nilfs2-add-tracepoints-for-analyzing-reading-and-writing-metadata-files.patch
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