On Fri, 2024-06-14 at 12:03 +0200, Christoph Hellwig wrote:
> As of Linux 6.10-rc the MM can 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.
>
> Signed-off-by: Christoph Hellwig <hch@xxxxxx>
> ---
> fs/nfs/direct.c | 2 --
> 1 file changed, 2 deletions(-)
>
> diff --git a/fs/nfs/direct.c b/fs/nfs/direct.c
> index bb2f583eb28bf1..90079ca134dd3c 100644
> --- a/fs/nfs/direct.c
> +++ b/fs/nfs/direct.c
> @@ -141,8 +141,6 @@ int nfs_swap_rw(struct kiocb *iocb, struct
> iov_iter *iter)
> {
> 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
This definitely seems wrong in a large folio world.
Reviewed-by: Jeff Layton <jlayton@xxxxxxxxxx>
