Date: Sat, 14 Dec 2013 16:08:12 -0800 From: Adrian Chadd <adrian@freebsd.org> To: Ryan Stone <rysto32@gmail.com> Cc: freebsd-net <freebsd-net@freebsd.org> Subject: Re: buf_ring in HEAD is racy Message-ID: <CAJ-Vmo=7DWgBFB=j2_qsFM3YwgO56LETjGXuAYaiaicMMqL19Q@mail.gmail.com> In-Reply-To: <CAFMmRNyJpvZ0AewWr62w16=qKer%2BFNXUJJy0Qc=EBqMnUV3OyQ@mail.gmail.com> References: <CAFMmRNyJpvZ0AewWr62w16=qKer%2BFNXUJJy0Qc=EBqMnUV3OyQ@mail.gmail.com>
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Also, I think it's a good idea to get a bullet-proof bufring implementation that uses atomics rather than mutexes. We really want there to be a cheap way to insert things into the queue. Honestly, we could just do with a generic multi-writer, single-reader ring type that we can re-use for other things, rather than just mbufs. We could also have the code run in userland and do some very in-depth stress testing of it there rather than needing it to be in the kernel. Hm.. -adrian
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