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John Paul Adrian Glaubitz composed on 2022-07-28 13:50 (UTC+0200):
Richard Biener wrote:
Thus I would propose raising the x86_64 architecture level to x86-64-v2 for openSUSE Factory. v2 requires CMPXCHG16B, [SL]AHF, POPCNT and SSE4_2 (and the predecessor SSE extensions) but not AVX, BMI or FMA.
What is it these functions add? What proportion of users with v2 support would actually notice any difference? Is this level in line with whatever Win11 requires?
I think it would be good to know which Intel and AMD CPUs were the first to introduce x86_64-v2, so that users know which CPUs will stop working with Tumbleweed.
+1 Does this mean dropping 32bit TW too? Which 64bit CPUs will be forced to switch to 32bit TW, and which to other distros? Support for older hardware has been a Linux tradition. Would it be feasible to have two 64bit TWs? If yes, one could go beyond v2, the other stay right where TW is now. I just finished zypper dup on a Pentium III with i810 graphics that Debian 11 fully supports, while Debian 12 roughly matches TW[2] in failing iGPU support from the Intel DDX[1]. :( [1] https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1016151 [2] (EE) open /dev/dri/card0: No such file or directory (EE) open /dev/fb0: No such file or directory (EE) intel(0): AGP GART support is not available. -- Evolution as taught in public schools is, like religion, based on faith, not based on science. Team OS/2 ** Reg. Linux User #211409 ** a11y rocks! Felix Miata