Re: [PATCH 0/2] Add BLK_FEAT_READ_SYNCHRONOUS and SWP_READ_SYNCHRONOUS_IO

[Matthew Wilcox]

On Fri, Oct 11, 2024 at 09:08:10AM +0000, Qun-wei Lin (林群崴) wrote:
> The primary motivation for these new feature flags is to handle
> scenarios where we want read operations to be completed within the
> submit context, while write operations are handled in a different
> context.
> 
> This does not necessarily imply that the write operations are slow;
> rather, it is about optimizing the handling of read and write
> operations based on their specific characteristics and requirements.

So why wouldn't we always want to do that instead of making it a
per-bdev flag?