From: Marcelo Ricardo Leitner <marcelo.leit...@gmail.com> Date: Thu, 10 Mar 2016 18:33:07 -0300
> Currently sctp_sendmsg() triggers some calls that will allocate memory > with GFP_ATOMIC even when not necessary. In the case of > sctp_packet_transmit it will allocate a linear skb that will be used to > construct the packet and this may cause sends to fail due to ENOMEM more > often than anticipated specially with big MTUs. > > This patch thus allows it to inherit gfp flags from upper calls so that > it can use GFP_KERNEL if it was triggered by a sctp_sendmsg call or > similar. All others, like retransmits or flushes started from BH, are > still allocated using GFP_ATOMIC. > > In netperf tests this didn't result in any performance drawbacks when > memory is not too fragmented and made it trigger ENOMEM way less often. > > Signed-off-by: Marcelo Ricardo Leitner <marcelo.leit...@gmail.com> Applied, thanks.
