This is a note to let you know that I've just added the patch titled
NFS: Allow very small rsize & wsize again
to the 6.0-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
nfs-allow-very-small-rsize-wsize-again.patch
and it can be found in the queue-6.0 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit f3805ae8ac3b5bcc01c426f8c5f9adb3bfdc623a
Author: Anna Schumaker <Anna.Schumaker@xxxxxxxxxx>
Date: Wed Nov 30 15:30:47 2022 -0500
NFS: Allow very small rsize & wsize again
[ Upstream commit a60214c2465493aac0b014d87ee19327b6204c42 ]
940261a19508 introduced nfs_io_size() to clamp the iosize to a multiple
of PAGE_SIZE. This had the unintended side effect of no longer allowing
iosizes less than a page, which could be useful in some situations.
UDP already has an exception that causes it to fall back on the
power-of-two style sizes instead. This patch adds an additional
exception for very small iosizes.
Reported-by: Jeff Layton <jlayton@xxxxxxxxxx>
Fixes: 940261a19508 ("NFS: Allow setting rsize / wsize to a multiple of PAGE_SIZE")
Signed-off-by: Anna Schumaker <Anna.Schumaker@xxxxxxxxxx>
Reviewed-by: Jeff Layton <jlayton@xxxxxxxxxx>
Signed-off-by: Trond Myklebust <trond.myklebust@xxxxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/fs/nfs/internal.h b/fs/nfs/internal.h
index 898dd95bc7a7..c194a1e50f0b 100644
--- a/fs/nfs/internal.h
+++ b/fs/nfs/internal.h
@@ -741,12 +741,10 @@ unsigned long nfs_io_size(unsigned long iosize, enum xprt_transports proto)
iosize = NFS_DEF_FILE_IO_SIZE;
else if (iosize >= NFS_MAX_FILE_IO_SIZE)
iosize = NFS_MAX_FILE_IO_SIZE;
- else
- iosize = iosize & PAGE_MASK;
- if (proto == XPRT_TRANSPORT_UDP)
+ if (proto == XPRT_TRANSPORT_UDP || iosize < PAGE_SIZE)
return nfs_block_bits(iosize, NULL);
- return iosize;
+ return iosize & PAGE_MASK;
}
/*
