On 23/04/2025 06:44, Christoph Hellwig wrote:
On Tue, Apr 22, 2025 at 07:08:32AM +0100, John Garry wrote:
So consider userspace wants to write something atomically and we fail as a
HW-based atomic write is not possible. What is userspace going to do next?
Exactly.
I heard something like "if HW-based atomics are not possible, then
something has not been configured properly for the FS" - that something
would be extent granularity and alignment, but we don't have a method to
ensure this. That is the whole point of having a FS fallback.
We now have the opt limit, right?
right
(I'll review the reposted series
ASAP,
ok, cheers
but for now I'll assume it) They can just tune their applications
to it, and trigger on a trace point for the fallback to monitor it.
