Re: Aarch64 EXT4FS inode checksum failures - seems to be weak memory ordering issues

On Fri, Jan 08, 2021 at 10:21:54AM +0100, Peter Zijlstra wrote:

On Thu, Jan 07, 2021 at 10:20:38PM +0100, Arnd Bergmann wrote:

quoted

On Thu, Jan 7, 2021 at 2:37 PM Russell King - ARM Linux admin

quoted

quoted

So, do we raise the minimum gcc version for the kernel as a whole to 5.1
or just for aarch64?

I'd personally love to see gcc-5 as the global minimum version, as that
would let us finally use --std=gnu11 features instead of gnu89. [There are
a couple of useful features that are incompatible with gnu89, and
gnu99/gnu11 support in gcc didn't like the kernel sources]

+1 for raising the tree-wide minimum (again!). We actually have a bunch
of work-arounds for 4.9 bugs we can get rid of as well.

We even just added another one for arm64 KVM! [1]

So yes, I'm in favour of leaving gcc 4.9 to rot as well, especially after
this ext4 debugging experience.

Will

[1] https://git.kernel.org/linus/9fd339a45be5