Messages in this thread Patch in this message | | | Date | Sun, 19 Mar 2006 10:34:35 +0800 | From | Wu Fengguang <> | Subject | [PATCH 22/23] readahead: debug traces showing accessed file names |
| |
Print file names on their first read-ahead, for tracing file access patterns.
Signed-off-by: Wu Fengguang <wfg@mail.ustc.edu.cn> ---
mm/readahead.c | 14 ++++++++++++++ 1 files changed, 14 insertions(+)
--- linux-2.6.16-rc6-mm2.orig/mm/readahead.c +++ linux-2.6.16-rc6-mm2/mm/readahead.c @@ -1229,6 +1229,20 @@ static int ra_dispatch(struct file_ra_st ra_account(ra, RA_EVENT_IO_CACHE_HIT, ra_size - actual); ra_account(ra, RA_EVENT_READAHEAD, actual); + if (!ra->ra_index && filp->f_dentry->d_inode) { + char *fn; + static char path[1024]; + unsigned long size; + + size = (i_size_read(filp->f_dentry->d_inode)+1023)/1024; + fn = d_path(filp->f_dentry, filp->f_vfsmnt, path, 1000); + if (!IS_ERR(fn)) + ddprintk("ino %lu is %s size %luK by %s(%d)\n", + filp->f_dentry->d_inode->i_ino, + fn, size, + current->comm, current->pid); + } + dprintk("readahead-%s(ino=%lu, index=%lu, ra=%lu+%lu-%lu) = %d\n", ra_class_name[ra_class], mapping->host->i_ino, ra->la_index, -- - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
| |