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f2fs: add some tracepoints to debug volatile and atomic writes

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Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
This commit is contained in:
Jaegeuk Kim 2015-03-17 17:58:08 -07:00
parent 3c6c2bebef
commit 8ce67cb07d
4 changed files with 36 additions and 1 deletions
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2
fs/f2fs/data.c
View File

@ -1287,9 +1287,11 @@ int do_write_data_page(struct page *page, struct f2fs_io_info *fio)
need_inplace_update(inode))) {
rewrite_data_page(page, fio);
set_inode_flag(F2FS_I(inode), FI_UPDATE_WRITE);
trace_f2fs_do_write_data_page(page, IPU);
} else {
write_data_page(page, &dn, fio);
f2fs_update_extent_cache(&dn);
trace_f2fs_do_write_data_page(page, OPU);
set_inode_flag(F2FS_I(inode), FI_APPEND_WRITE);
if (page->index == 0)
set_inode_flag(F2FS_I(inode), FI_FIRST_BLOCK_WRITTEN);

4
fs/f2fs/f2fs.h
View File

@ -556,6 +556,10 @@ enum page_type {
META,
NR_PAGE_TYPE,
META_FLUSH,
INMEM, /* the below types are used by tracepoints only. */
INMEM_DROP,
IPU,
OPU,
};
struct f2fs_io_info {

4
fs/f2fs/segment.c
View File

@ -205,6 +205,8 @@ retry:
list_add_tail(&new->list, &fi->inmem_pages);
inc_page_count(F2FS_I_SB(inode), F2FS_INMEM_PAGES);
mutex_unlock(&fi->inmem_lock);
trace_f2fs_register_inmem_page(page, INMEM);
}
void commit_inmem_pages(struct inode *inode, bool abort)
@ -238,11 +240,13 @@ void commit_inmem_pages(struct inode *inode, bool abort)
f2fs_wait_on_page_writeback(cur->page, DATA);
if (clear_page_dirty_for_io(cur->page))
inode_dec_dirty_pages(inode);
trace_f2fs_commit_inmem_page(cur->page, INMEM);
do_write_data_page(cur->page, &fio);
submit_bio = true;
}
f2fs_put_page(cur->page, 1);
} else {
trace_f2fs_commit_inmem_page(cur->page, INMEM_DROP);
put_page(cur->page);
}
radix_tree_delete(&fi->inmem_root, cur->page->index);

27
include/trace/events/f2fs.h
View File

@ -14,7 +14,11 @@
{ NODE, "NODE" }, \
{ DATA, "DATA" }, \
{ META, "META" }, \
{ META_FLUSH, "META_FLUSH" })
{ META_FLUSH, "META_FLUSH" }, \
{ INMEM, "INMEM" }, \
{ INMEM_DROP, "INMEM_DROP" }, \
{ IPU, "IN-PLACE" }, \
{ OPU, "OUT-OF-PLACE" })
#define F2FS_BIO_MASK(t) (t & (READA | WRITE_FLUSH_FUA))
#define F2FS_BIO_EXTRA_MASK(t) (t & (REQ_META | REQ_PRIO))
@ -854,6 +858,13 @@ DEFINE_EVENT(f2fs__page, f2fs_writepage,
TP_ARGS(page, type)
);
DEFINE_EVENT(f2fs__page, f2fs_do_write_data_page,
TP_PROTO(struct page *page, int type),
TP_ARGS(page, type)
);
DEFINE_EVENT(f2fs__page, f2fs_readpage,
TP_PROTO(struct page *page, int type),
@ -875,6 +886,20 @@ DEFINE_EVENT(f2fs__page, f2fs_vm_page_mkwrite,
TP_ARGS(page, type)
);
DEFINE_EVENT(f2fs__page, f2fs_register_inmem_page,
TP_PROTO(struct page *page, int type),
TP_ARGS(page, type)
);
DEFINE_EVENT(f2fs__page, f2fs_commit_inmem_page,
TP_PROTO(struct page *page, int type),
TP_ARGS(page, type)
);
TRACE_EVENT(f2fs_writepages,
TP_PROTO(struct inode *inode, struct writeback_control *wbc, int type),