The patch titled
Subject: gfs2: support ludicrously large folios in gfs2_trans_add_databufs()
has been added to the -mm mm-unstable branch. Its filename is
gfs2-support-ludicrously-large-folios-in-gfs2_trans_add_databufs.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/gfs2-support-ludicrously-large-folios-in-gfs2_trans_add_databufs.patch
This patch will later appear in the mm-unstable branch at
git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
Before you just go and hit "reply", please:
a) Consider who else should be cc'ed
b) Prefer to cc a suitable mailing list as well
c) Ideally: find the original patch on the mailing list and do a
reply-to-all to that, adding suitable additional cc's
*** Remember to use Documentation/process/submit-checklist.rst when testing your code ***
The -mm tree is included into linux-next via the mm-everything
branch at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
and is updated there every 2-3 working days
------------------------------------------------------
From: "Matthew Wilcox (Oracle)" <willy@xxxxxxxxxxxxx>
Subject: gfs2: support ludicrously large folios in gfs2_trans_add_databufs()
Date: Mon, 12 Jun 2023 22:01:32 +0100
We may someday support folios larger than 4GB, so use a size_t for the
byte count within a folio to prevent unpleasant truncations.
Link: https://lkml.kernel.org/r/20230612210141.730128-6-willy@xxxxxxxxxxxxx
Signed-off-by: Matthew Wilcox (Oracle) <willy@xxxxxxxxxxxxx>
Tested-by: Bob Peterson <rpeterso@xxxxxxxxxx>
Reviewed-by: Bob Peterson <rpeterso@xxxxxxxxxx>
Reviewed-by: Andreas Gruenbacher <agruenba@xxxxxxxxxx>
Cc: Hannes Reinecke <hare@xxxxxxxx>
Cc: Luis Chamberlain <mcgrof@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
fs/gfs2/aops.c | 6 +++---
fs/gfs2/aops.h | 2 +-
2 files changed, 4 insertions(+), 4 deletions(-)
--- a/fs/gfs2/aops.c~gfs2-support-ludicrously-large-folios-in-gfs2_trans_add_databufs
+++ a/fs/gfs2/aops.c
@@ -38,13 +38,13 @@
void gfs2_trans_add_databufs(struct gfs2_inode *ip, struct folio *folio,
- unsigned int from, unsigned int len)
+ size_t from, size_t len)
{
struct buffer_head *head = folio_buffers(folio);
unsigned int bsize = head->b_size;
struct buffer_head *bh;
- unsigned int to = from + len;
- unsigned int start, end;
+ size_t to = from + len;
+ size_t start, end;
for (bh = head, start = 0; bh != head || !start;
bh = bh->b_this_page, start = end) {
--- a/fs/gfs2/aops.h~gfs2-support-ludicrously-large-folios-in-gfs2_trans_add_databufs
+++ a/fs/gfs2/aops.h
@@ -10,6 +10,6 @@
extern void adjust_fs_space(struct inode *inode);
extern void gfs2_trans_add_databufs(struct gfs2_inode *ip, struct folio *folio,
- unsigned int from, unsigned int len);
+ size_t from, size_t len);
#endif /* __AOPS_DOT_H__ */
_
Patches currently in -mm which might be from willy@xxxxxxxxxxxxx are
gfs2-use-a-folio-inside-gfs2_jdata_writepage.patch
gfs2-pass-a-folio-to-__gfs2_jdata_write_folio.patch
gfs2-convert-gfs2_write_jdata_page-to-gfs2_write_jdata_folio.patch
buffer-convert-__block_write_full_page-to-__block_write_full_folio.patch
gfs2-support-ludicrously-large-folios-in-gfs2_trans_add_databufs.patch
buffer-make-block_write_full_page-handle-large-folios-correctly.patch
buffer-convert-block_page_mkwrite-to-use-a-folio.patch
buffer-convert-__block_commit_write-to-take-a-folio.patch
buffer-convert-page_zero_new_buffers-to-folio_zero_new_buffers.patch
buffer-convert-grow_dev_page-to-use-a-folio.patch
buffer-convert-init_page_buffers-to-folio_init_buffers.patch
buffer-convert-link_dev_buffers-to-take-a-folio.patch
buffer-use-a-folio-in-__find_get_block_slow.patch
buffer-convert-block_truncate_page-to-use-a-folio.patch
