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
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