The patch titled
readahead: debug traces showing accessed file names
has been removed from the -mm tree. Its filename was
readahead-debug-traces-showing-accessed-file-names.patch
This patch was dropped because an updated version will be merged
------------------------------------------------------
Subject: readahead: debug traces showing accessed file names
From: Wu Fengguang <wfg@xxxxxxxxxxxxxxxx>
Print file names on their first read-ahead, for tracing file access patterns.
Signed-off-by: Wu Fengguang <wfg@xxxxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxx>
---
mm/readahead.c | 14 ++++++++++++++
1 file changed, 14 insertions(+)
diff -puN mm/readahead.c~readahead-debug-traces-showing-accessed-file-names mm/readahead.c
--- a/mm/readahead.c~readahead-debug-traces-showing-accessed-file-names
+++ a/mm/readahead.c
@@ -1081,6 +1081,20 @@ 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_new(ra)],
mapping->host->i_ino, ra->la_index,
_
Patches currently in -mm which might be from wfg@xxxxxxxxxxxxxxxx are
readahead-debug-traces-showing-accessed-file-names.patch
readahead-debug-traces-showing-read-patterns.patch
readahead-remove-size-limit-on-read_ahead_kb.patch
readahead-backward-prefetching-method-fix.patch
readahead-remove-the-size-limit-of-max_sectors_kb-on-read_ahead_kb.patch
-
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