Tariq Toukan <ttoukan.linux@xxxxxxxxx> wrote: > Any other debug information that we can provide to progress with the analysis? Can you see if the problem still happens on this branch of my tree? https://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs.git/log/?h=sendpage-3-frag It eases the restriction that the WARN_ON is warning about by (in patch 1[*]) copying slab objects into page fragments. David [*] "net: Copy slab data for sendmsg(MSG_SPLICE_PAGES)"