On 2015-10-08 22:20, Henrique de Moraes Holschuh wrote: > tag 800574 + patch > thanks > > Attached updated version of amd64/local-blacklist-on-TSX-Haswell.diff. > I believe it should be renamed to > "amd64/local-blacklist-for-Intel-TSX.diff" as it is not just about Intel > Haswell anymore. > > The updated patch has been package-compile-tested on glibc 2.19-22. > > This new version of the blacklist patch had the patch header text and > blacklist code comments updated. It doesn't change anything for > Haswell. It adds to the blacklist the current Broadwell CPU models and > steppings. > > Broadwell-H with a very recent microcode update (rev 0x12, from > 2015-06-04) was confirmed to have broken TSX-NI (RTM) and to _leave it > enabled_ in CPUID, causing glibc with lock elision enabled to SIGSEGV. > An even more recent Broadwell-H microcode update, rev 0x13 from > 2015-08-03, is confirmed to (finally) disable the HLE and RTM CPUID > bits. This should make blacklisting signature 0x40671 uncontroversial. > > Refer to https://bugzilla.kernel.org/show_bug.cgi?id=103351 for details. > > This version of the blacklist patch leaves upcoming Broadwell-E > unblacklisted. It also leaves Skylake unblacklisted, as I have not been > able to confirm whether the newest Skylake-S microcode updates have > working Intel TSX-NI, or have it disabled. > > I propose that the updated blacklist patch be added to glibc in > unstable, and after it spends a few weeks in testing, that it should > also be the added to stable through a stable update.
Thanks for the patch, I have committed it to the jessie and the 2.21 branches. -- Aurelien Jarno GPG: 4096R/1DDD8C9B aurel...@aurel32.net http://www.aurel32.net
