The patch titled
Subject: nfs: fix nfs_swap_rw for large-folio swap
has been added to the -mm mm-unstable branch. Its filename is
nfs-fix-nfs_swap_rw-for-large-folio-swap.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/nfs-fix-nfs_swap_rw-for-large-folio-swap.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: Christoph Hellwig <hch@xxxxxx>
Subject: nfs: fix nfs_swap_rw for large-folio swap
Date: Fri, 14 Jun 2024 12:03:25 +0200
The series "large folios swap-in: handle refault cases first" will permit
the MM to swap out larger than page size chunks. NFS has all code ready
to handle this, but has a VM_BUG_ON that triggers when this happens.
Simply remove the VM_BUG_ON to fix this use case.
Link: https://lkml.kernel.org/r/20240614100329.1203579-2-hch@xxxxxx
Signed-off-by: Christoph Hellwig <hch@xxxxxx>
Cc: Anna Schumaker <anna@xxxxxxxxxx>
Cc: Steve French <sfrench@xxxxxxxxx>
Cc: Trond Myklebust <trondmy@xxxxxxxxxx>
Cc: Chuanhua Han <hanchuanhua@xxxxxxxx>
Cc: Barry Song <v-songbaohua@xxxxxxxx>
Cc: Ryan Roberts <ryan.roberts@xxxxxxx>
Cc: Chris Li <chrisl@xxxxxxxxxx>
Cc: "Huang, Ying" <ying.huang@xxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
fs/nfs/direct.c | 2 --
1 file changed, 2 deletions(-)
--- a/fs/nfs/direct.c~nfs-fix-nfs_swap_rw-for-large-folio-swap
+++ a/fs/nfs/direct.c
@@ -141,8 +141,6 @@ int nfs_swap_rw(struct kiocb *iocb, stru
{
ssize_t ret;
- VM_BUG_ON(iov_iter_count(iter) != PAGE_SIZE);
-
if (iov_iter_rw(iter) == READ)
ret = nfs_file_direct_read(iocb, iter, true);
else
_
Patches currently in -mm which might be from hch@xxxxxx are
nfs-fix-nfs_swap_rw-for-large-folio-swap.patch
