The rsize/wsize values are not multiples of 1024 but multiples of PAGE_SIZE or powers of 2 if < PAGE_SIZE as defined in fs/nfs/internal.h:nfs_io_size(). Signed-off-by: Seiichi Ikarashi <s.ikarashi@xxxxxxxxxxx> --- utils/mount/nfs.man | 24 +++++++++++++++--------- 1 file changed, 15 insertions(+), 9 deletions(-) diff --git a/utils/mount/nfs.man b/utils/mount/nfs.man index 233a717..01fa22c 100644 --- a/utils/mount/nfs.man +++ b/utils/mount/nfs.man @@ -215,15 +215,18 @@ or smaller than the setting. The largest read payload supported by the Linux NFS client is 1,048,576 bytes (one megabyte). .IP -The +The allowed .B rsize -value is a positive integral multiple of 1024. +value is a positive integral multiple of +.BR PAGE_SIZE , +or a power of two if it is less than +.BR PAGE_SIZE . Specified .B rsize values lower than 1024 are replaced with 4096; values larger than 1048576 are replaced with 1048576. If a specified value is within the supported -range but not a multiple of 1024, it is rounded down to the nearest -multiple of 1024. +range but not such an allowed value, it is rounded down to the nearest +allowed value. .IP If an .B rsize @@ -257,16 +260,19 @@ setting. The largest write payload supported by the Linux NFS client is 1,048,576 bytes (one megabyte). .IP Similar to -.B rsize -, the +.BR rsize , +the allowed .B wsize -value is a positive integral multiple of 1024. +value is a positive integral multiple of +.BR PAGE_SIZE , +or a power of two if it is less than +.BR PAGE_SIZE . Specified .B wsize values lower than 1024 are replaced with 4096; values larger than 1048576 are replaced with 1048576. If a specified value is within the supported -range but not a multiple of 1024, it is rounded down to the nearest -multiple of 1024. +range but not such an allowed value, it is rounded down to the nearest +allowed value. .IP If a .B wsize
