Am 30.04.2015 um 19:45 schrieb Andrew Savchenko: > Hi, > > On Thu, 30 Apr 2015 18:26:22 +0200 Volker Armin Hemmann wrote: >> That simple. The kernel is too important and the people programming it >> know what they are doing. Don't set anything. It is retarded. >>> - I don't like invoking 'CFLAGS="-O2 -march=foo"make' >>> - I don't want to set CFLAGS as a persistent environment variable. >>> - I don't want to modify the kernel Makefile >>> >>> Does it actually make sense to set an optimization level and -march? >> no > While I completely agree with you that kernel CFLAGS should not be > randomly tampered with, I can't agree that -march itself is useless. > Tests and results are available here: > https://github.com/graysky2/kernel_gcc_patch > > Optimization is a very powerful tool if taken with care. Of course > it may lead to a disastrous result if mindlessly used. > > Best regards, > Andrew Savchenko
if your mail client or browser is miscompiled, it is crashy, but worst case, a bunch of emails or bookmarks are lost. If the kernel fucks up, it might write across partition boundaries and destroy ALL your data. Or writes garbage instead of data. Don't f* with the kernel.
