f2fs: add a tracepoint for f2fs_read_data_pages
This patch adds a tracepoint for f2fs_read_data_pages to trace when pages are readahead by VFS. Signed-off-by: Chao Yu <chao2.yu@samsung.com> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
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@ -1032,6 +1032,9 @@ static int f2fs_read_data_pages(struct file *file,
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struct list_head *pages, unsigned nr_pages)
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{
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struct inode *inode = file->f_mapping->host;
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struct page *page = list_entry(pages->prev, struct page, lru);
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trace_f2fs_readpages(inode, page, nr_pages);
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/* If the file has inline data, skip readpages */
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if (f2fs_has_inline_data(inode))
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@ -1028,6 +1028,32 @@ TRACE_EVENT(f2fs_writepages,
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__entry->for_sync)
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);
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TRACE_EVENT(f2fs_readpages,
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TP_PROTO(struct inode *inode, struct page *page, unsigned int nrpage),
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TP_ARGS(inode, page, nrpage),
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TP_STRUCT__entry(
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__field(dev_t, dev)
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__field(ino_t, ino)
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__field(pgoff_t, start)
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__field(unsigned int, nrpage)
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),
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TP_fast_assign(
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__entry->dev = inode->i_sb->s_dev;
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__entry->ino = inode->i_ino;
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__entry->start = page->index;
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__entry->nrpage = nrpage;
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),
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TP_printk("dev = (%d,%d), ino = %lu, start = %lu nrpage = %u",
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show_dev_ino(__entry),
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(unsigned long)__entry->start,
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__entry->nrpage)
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);
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TRACE_EVENT(f2fs_write_checkpoint,
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TP_PROTO(struct super_block *sb, int reason, char *msg),
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