+ readahead-avoid-multiple-marked-readahead-pages-v2.patch added to mm-hotfixes-unstable branch

+ readahead-avoid-multiple-marked-readahead-pages-v2.patch added to mm-hotfixes-unstable branch

[Andrew Morton]

The patch titled
     Subject: readahead: Avoid multiple marked readahead pages
has been added to the -mm mm-hotfixes-unstable branch.  Its filename is
     readahead-avoid-multiple-marked-readahead-pages-v2.patch

This patch will shortly appear at
     https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/readahead-avoid-multiple-marked-readahead-pages-v2.patch

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

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------------------------------------------------------
From: Jan Kara <jack@suse.cz>
Subject: readahead: Avoid multiple marked readahead pages
Date: Tue, 23 Jan 2024 16:32:54 +0100

fix one more place where mark rounding was done as well

Link: https://lkml.kernel.org/r/20240123153254.5206-1-jack@suse.cz
Fixes: b9ff43dd2743 ("mm/readahead: Fix readahead with large folios")
Signed-off-by: Jan Kara <jack@suse.cz>
Cc: Guo Xuenan <guoxuenan@huawei.com>
Cc: Matthew Wilcox <willy@infradead.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 mm/readahead.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/mm/readahead.c~readahead-avoid-multiple-marked-readahead-pages-v2
+++ a/mm/readahead.c
@@ -575,7 +575,7 @@ static void ondemand_readahead(struct re
 	 * It's the expected callback index, assume sequential access.
 	 * Ramp up sizes, and push forward the readahead window.
 	 */
-	expected = round_up(ra->start + ra->size - ra->async_size,
+	expected = round_down(ra->start + ra->size - ra->async_size,
 			1UL << order);
 	if (index == expected || index == (ra->start + ra->size)) {
 		ra->start += ra->size;
_

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

readahead-avoid-multiple-marked-readahead-pages.patch
readahead-avoid-multiple-marked-readahead-pages-v2.patch