> -----Original Message----- > From: [email protected] [mailto:kernelnewbies- > [email protected]] On Behalf Of mindentropy > Sent: Friday, July 29, 2011 1:35 PM > To: [email protected] > Subject: Regarding connector netlink running out of buffer space. > > Hi, > I am trying to benchmark connector netlink and am passing a file and > sending > the same to listening userspace app's using connectors i.e. cat filename > > /dev/myconnector and an app listening. When I do this I always run into > ENOBUFS or "No buffer space available" for files greater than 2MB. > Now how should I fix this? > a) Increase the socket buffers? My rmem_max is 131071 and rmem_default > is > 126976 > b) Should I check for the seq and ack and resend the packets? If yes how > much > packets should I not discard to do a resend? > > Are there any other ways? Also I am not sure why local loop would cause > enobufs? I am running this on a quad core with 3G of RAM. > > Thanks.
Just guessing here, but it's possible the kernel is attempting to kmalloc() a single buffer for the whole file and with the file at 2MB there's no slab/slob/slub with buffers that big. You might need to write to /dev/myconnector in smaller chunks. Again, just a guess. _______________________________________________ Kernelnewbies mailing list [email protected] http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
