5 Sep
2014
5 Sep
'14
2:21 p.m.
On Fri, Sep 05, 2014 at 12:02:18AM +0200, Wouter Verhelst wrote:
[Cc: to nbd-general list added]
On Wed, Sep 03, 2014 at 05:44:17PM +0100, Stefan Hajnoczi wrote:
Besides QEMU, the userspace NBD tools (http://nbd.sf.net/) can also be extended to support TLS. In this case the kernel needs a localhost socket and userspace handles TLS.
That introduces a possibility for a deadlock, since now your network socket isn't on the PF_MEMALLOC-protected socket anymore, which will cause the kernel to throw away packets which are needed for your nbd connection, in hopes of clearing some memory.
Understood but there are plenty of use cases where this doesn't matter. Stefan