Le lundi 09 juillet 2012 à 10:44 -0400, Jeff Mahoney a écrit :
On 7/9/12 10:37 AM, Jean Delvare wrote:
So, unless someone objects by then, I'll
CONFIG_CC_STACKPROTECTOR=y in i386 and x86_64 kernels tomorrow.
Thanks for looking into this, Jean. Since we don't have a bnc in the
commit log to see what the performance degradation looked like
originally, I'd like to see some analysis now to actually confirm
whether it makes a difference anymore.
openSUSE 12.2 was supposed to be released in two days time but was
delayed due to too much churn (among other things). If there is a
performance difference, I'd prefer to know about it before we do the
change rather than depend on post-release bug reports and the
accompanying hand-wringing over whether to revert it.
Are you simply suggesting that I should change the configuration for
master only and not the openSUSE-12.2 branch? Or should I wait even for
I admit I'm not sure how to test for performance regression. With
CONFIG_CC_STACKPROTECTOR_ALL it was relatively obvious, but now that
only selected functions get the protection, I can imagine that the
performance hit completely depends on the drivers, filesystem etc. in
It might be easier to check what other distributions are doing, and
simply align on that. Richard said that Debian and Fedora "seemed" to
enable it by default, it would have to be confirmed, and ideally Ubuntu
and RHEL should be checked as well. Unfortunately I don't have any of
these at home so I can't check.
To unsubscribe, e-mail: opensuse-kernel+unsubscribe(a)opensuse.org
To contact the owner, e-mail: opensuse-kernel+owner(a)opensuse.org