On Wed, 9 Mar 2011 16:20:42 +0100 "Assarsson, Emil" <Emil.Assarsson@xxxxxxxxxxxxxxxx> wrote: > Hi All, > > Running linux kernel 2.6.32 and nfs-utils 1.2.0 (Ubuntu Lucid) > > A regular user in our company usually is member of more than 300 groups. Some user even have up to 600. We want to use the --manage-gids option for mountd. However it seems to me that it is limited to about 100 groups. > > The reason seems to be that there is a hard limit for mountd but also that the /proc/net/rpc/auth.unix.gid/channel won't accept more than 1008 characters as input. > > I tried to adjust the code for mountd so that it tried to add up to 1000 groups but then I ran in to the channel problem. > > Can someone please guide me to the place where I can adjust this limit? > The limit should be 8192, not 1008. This is set in net/sunrpc/cache.c If the write is less than one page, it is handled in cache_downcall(). If it is bigger it is passed to cache_slow_downcall() which stops at 8192 (but could trivially be make to handle more). What is your evidence that '.../channel won't accept more than 1008 characters as input" ??? Thanks, NeilBrown -- To unsubscribe from this list: send the line "unsubscribe linux-nfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
