[libvirt] [PATCH v3 0/2] Rework RPC message buffer

This patch set tries to fix corner cases where libvirt runs on huge system, e.g. 4K CPU monster. In these cases, capabilities XML is enormously big, as we are transferring info about each singe CPU core (to which NUMA node it belongs, etc.). This XML is bigger than our RPC limit, therefore users cannot get it as it is dropped on server, leaving them with inability to connect. Therefore we need to increase those limits (whole RPC message and RPC string). However, simple lifting up will work, but increase mem usage. Therefore I've reworked RPC buffer handling: changed it from 'statically' to dynamically allocated. So in most cases - when small messages are sent - this will even decrease our memory consumption. Leaving us flexible for corner cases described above. On the other hand, I realize we've had our history with RPC breakage. So I think I'll require more than 1 ACK before pushing. (I guess Eric's ACK still holds) diff to v2: -suggestions from Eric's review included diff to v1: -couple of fixes (1/2) -increased other limits as well (2/2) Michal Privoznik (2): rpc: Switch to dynamically allocated message buffer rpc: Size up RPC limits src/libvirt.c | 2 + src/remote/remote_protocol.x | 20 +- src/rpc/virnetclient.c | 16 ++- src/rpc/virnetmessage.c | 12 ++- src/rpc/virnetmessage.h | 5 +- src/rpc/virnetprotocol.x | 6 +- src/rpc/virnetserverclient.c | 24 +++- tests/virnetmessagetest.c | 393 +++++++++++++++++++++++------------------- 8 files changed, 281 insertions(+), 197 deletions(-) -- 1.7.8.5