+ readahead-add-trace-points-v2.patch added to mm-new branch

[Andrew Morton <akpm@linux-foundation.org>]

The patch titled
     Subject: readahead-add-trace-points-v2
has been added to the -mm mm-new branch.  Its filename is
     readahead-add-trace-points-v2.patch

This patch will shortly appear at
     https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/readahead-add-trace-points-v2.patch

This patch will later appear in the mm-new branch at
    git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

Note, mm-new is a provisional staging ground for work-in-progress
patches, and acceptance into mm-new is a notification for others take
notice and to finish up reviews.  Please do not hesitate to respond to
review feedback and post updated versions to replace or incrementally
fixup patches in mm-new.

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------------------------------------------------------
From: Jan Kara <jack@suse.cz>
Subject: readahead-add-trace-points-v2
Date: Tue, 9 Sep 2025 16:58:50 +0200

Move tracepoint from do_page_cache_ra() to page_cache_ra_unbounded() as
that is a more standard function.

Link: https://lkml.kernel.org/r/20250909145849.5090-2-jack@suse.cz
Signed-off-by: Jan Kara <jack@suse.cz>
Cc: Pankaj Raghav <kernel@pankajraghav.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 include/trace/events/readahead.h |    2 +-
 mm/readahead.c                   |    3 ++-
 2 files changed, 3 insertions(+), 2 deletions(-)

--- a/include/trace/events/readahead.h~readahead-add-trace-points-v2
+++ a/include/trace/events/readahead.h
@@ -11,7 +11,7 @@
 #include <linux/fs.h>
 #include <linux/pagemap.h>
 
-TRACE_EVENT(do_page_cache_ra,
+TRACE_EVENT(page_cache_ra_unbounded,
 	TP_PROTO(struct inode *inode, pgoff_t index, unsigned long nr_to_read,
 		 unsigned long lookahead_size),
 
--- a/mm/readahead.c~readahead-add-trace-points-v2
+++ a/mm/readahead.c
@@ -228,6 +228,8 @@ void page_cache_ra_unbounded(struct read
 	 */
 	unsigned int nofs = memalloc_nofs_save();
 
+	trace_page_cache_ra_unbounded(mapping->host, index, nr_to_read,
+				      lookahead_size);
 	filemap_invalidate_lock_shared(mapping);
 	index = mapping_align_index(mapping, index);
 
@@ -317,7 +319,6 @@ static void do_page_cache_ra(struct read
 	loff_t isize = i_size_read(inode);
 	pgoff_t end_index;	/* The last page we want to read */
 
-	trace_do_page_cache_ra(inode, index, nr_to_read, lookahead_size);
 	if (isize == 0)
 		return;
 
_

Patches currently in -mm which might be from jack@suse.cz are

readahead-add-trace-points.patch
readahead-add-trace-points-v2.patch