On Tue, 13 Sep 2011 10:08:59 -0400 Jeff Layton <[email protected]> wrote:
> With the addition of async readpages in 3.2 kernels, the behavior of > the rsize= option has changed. > > Signed-off-by: Jeff Layton <[email protected]> > --- > mount.cifs.8 | 4 ++-- > 1 files changed, 2 insertions(+), 2 deletions(-) > > diff --git a/mount.cifs.8 b/mount.cifs.8 > index 64a8b64..ff505e1 100644 > --- a/mount.cifs.8 > +++ b/mount.cifs.8 > @@ -414,9 +414,9 @@ nouser_xattr > (default) Do not allow getfattr/setfattr to get/set xattrs, even if server > would support it otherwise\&. > .RE > .PP > -rsize=\fIarg\fR > +rsize=\fIbytes\fR > .RS 4 > -default network read size (usually 16K)\&. The client currently can not use > rsize larger than CIFSMaxBufSize\&. CIFSMaxBufSize defaults to 16K and may be > changed (from 8K to the maximum kmalloc size allowed by your kernel) at > module install time for cifs\&.ko\&. Setting CIFSMaxBufSize to a very large > value will cause cifs to use more memory and may reduce performance in some > cases\&. To use rsize greater than 127K (the original cifs protocol maximum) > also requires that the server support a new Unix Capability flag (for very > large read) which some newer servers (e\&.g\&. Samba 3\&.0\&.26 or later) > do\&. rsize can be set from a minimum of 2048 to a maximum of 130048 (127K or > CIFSMaxBufSize, whichever is smaller) > +Maximum amount of data that the kernel will request in a read request in > bytes. Prior to kernel 3.2.0, the default was 16k, and the maximum size was > limited by the CIFSMaxBufSize module parameter. As of kernel 3.2.0, the > behavior varies according to whether POSIX extensions are enabled on the > mount and the server supports large POSIX reads. If they are, then the > default is 1M, and the maxmimum is 16M. If they are not supported by the > server, then the default is 60k and the maximum is around 127k. The reason > for the 60k is because it's the maximum size read that windows servers can > fill. Note that this value is a maximum, and the client may settle on a > smaller size to accomodate what the server supports. In kernels prior to > 3.2.0, no negotiation is performed. > .RE > .PP > wsize=\fIbytes\fR > -- > 1.7.6 > Committed. -- Jeff Layton <[email protected]> -- To unsubscribe from this list: send the line "unsubscribe linux-cifs" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
