On 07/16/2017 12:14 AM, Aurelien Jarno wrote: > Do you have actually have a good documentation about gUSA? I have found > a few documents (some of them in Japanese), the most complete one being > the LinuxTag paper. The ABI is also described in the kernel and the > glibc. That said I am missing the following informations: > - What kind of instructions are allowed in the atomic sequence? Your > patch takes into account branches, but are there allowed? used in > practice? What about FP instructions? > - Does the atomic sequence is actually allowed to cross pages? > - Is there any alignement required? The paper mention adding a nop to > gUSA_exchange_and_add to align the end point to 4 bytes.
The best person to answer this is Yutaka Niibe as he is actually the person who came up with the design. I'll drop him a message and see if he can join the discussion. Adrian -- .''`. John Paul Adrian Glaubitz : :' : Debian Developer - glaub...@debian.org `. `' Freie Universitaet Berlin - glaub...@physik.fu-berlin.de `- GPG: 62FF 8A75 84E0 2956 9546 0006 7426 3B37 F5B5 F913
