On Tue, Jun 03, 2025 at 07:22:18PM +0530, Anuj gupta wrote:
> > A mount option is about the worst possible interface for behavior
> > that depends on file system implementation and possibly hardware
> > chacteristics.  This needs to be set by the file systems, possibly
> > using generic helpers using hardware information.
> 
> Right, that makes sense. Instead of using a mount option, we can
> introduce generic helpers to initialize multiple writeback contexts
> based on underlying hardware characteristics — e.g., number of CPUs or
> NUMA topology. Filesystems like XFS and EXT4 can then call these helpers
> during mount to opt into parallel writeback in a controlled way.

Yes.  A mount option might still be useful to override this default,
but it should not be needed for the normal use case.



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