The patch titled
readahead: debug traces showing accessed file names
has been added to the -mm tree. Its filename is
readahead-debug-traces-showing-accessed-file-names.patch
See http://www.zip.com.au/~akpm/linux/patches/stuff/added-to-mm.txt to find
out what to do about this
------------------------------------------------------
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
--- devel/mm/readahead.c~readahead-debug-traces-showing-accessed-file-names 2006-05-27 23:06:59.000000000 -0700
+++ devel-akpm/mm/readahead.c 2006-05-27 23:06:59.000000000 -0700
@@ -1038,6 +1038,20 @@ 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-kconfig-options.patch
radixtree-introduce-radix_tree_scan_hole.patch
mm-introduce-probe_page.patch
mm-introduce-pg_readahead.patch
readahead-add-look-ahead-support-to-__do_page_cache_readahead.patch
readahead-delay-page-release-in-do_generic_mapping_read.patch
readahead-insert-cond_resched-calls.patch
readahead-minmax_ra_pages.patch
readahead-events-accounting.patch
readahead-rescue_pages.patch
readahead-sysctl-parameters.patch
readahead-min-max-sizes.patch
readahead-state-based-method-aging-accounting.patch
readahead-state-based-method-routines.patch
readahead-state-based-method.patch
readahead-context-based-method.patch
readahead-initial-method-guiding-sizes.patch
readahead-initial-method-thrashing-guard-size.patch
readahead-initial-method-expected-read-size.patch
readahead-initial-method-user-recommended-size.patch
readahead-initial-method.patch
readahead-backward-prefetching-method.patch
readahead-seeking-reads-method.patch
readahead-thrashing-recovery-method.patch
readahead-call-scheme.patch
readahead-laptop-mode.patch
readahead-loop-case.patch
readahead-nfsd-case.patch
readahead-turn-on-by-default.patch
readahead-debug-radix-tree-new-functions.patch
readahead-debug-traces-showing-accessed-file-names.patch
readahead-debug-traces-showing-read-patterns.patch
-
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