On Wed, Sep 19, 2018 at 11:32:40PM +0200, [email protected] wrote: > Hello, > > I've stumbled upon a weird problem. Long story short, I try to open > fifo two times, once O_WRONLY and once O_RDONLY, both in separate > threads - but on process. Unfortunately both threads are locked in > open() functions. > > I prepared very small program that reproduces this problem for me, > please see attached file and note that there is no error handling > for readability. > > !!! Also note, this program may get stuck in D state, > and you won't be able to SIGKILL it. > > Anyone got any idea why is this happening? Is something wrong with > my code?
This is a kernel bug, no program may behave like this. > It works properly on netbsd, freebsd, aix, hpux and linux. > > I don't know what info exactly you might need, but here is uname, > it's almost clean system, I didn't make much changes, and > especially not in the core. > > # uname -a > OpenBSD bbs-i686-builder-openbsd.kurwinet.pl 6.2 GENERIC#163 i386 This is a old OpenBSD version; I reproduced it on 6.3 but not on -current (this doesn't mean the bug was fixed).
