On Thu, Jul 06, 2023 at 02:56:45PM -0700, Linus Torvalds wrote: > On Mon, 26 Jun 2023 at 09:14, Ahelenia Ziemiańska > <nabijaczleweli@xxxxxxxxxxxxxxxxxx> wrote: > > > > And even if that was a working work-around, the fundamental problem of > > ./spl>fifo excluding all other access to fifo is quite unfortunate too. > > So I already sent an earlier broken version of this patch to Ahelenia > and Christian, but here's an actually slightly tested version with the > obvious bugs fixed. > > The keyword here being "obvious". It's probably broken in many > non-obvious ways, but I'm sending it out in case anybody wants to play > around with it. > > It boots for me. It even changes behavior of programs that splice() > and used to keep the pipe lock over the IO and no longer do. > > But it might do unspeakable things to your pets, so caveat emptor. It > "feels" right to me. But it's a rather quick hack, and really needs > more eyes and more thought. I mention O_NDELAY in the (preliminary) > commit message, but there are probably other issues that need thinking > about. Forgot to say, fwiw, I've been running this through the LTP splice, pipe, and ipc tests without issues. A hanging reader can be signaled away cleanly with this.
