Hi,

在 2025/05/12 21:30, Christoph Hellwig 写道:
On Mon, May 12, 2025 at 03:26:41PM +0200, Christoph Hellwig wrote:
1) bitmap bio must be done before this bio can be issued;
2) bitmap bio will be added to current->bio_list, and wait for this bio
to be issued;

Do you have a better sulution to this problem?

A bew block layer API that bypasses bio_list maybe?  I.e. export
__submit_bio with a better name and a kerneldoc detailing the narrow
use case.

That won't work as we'd miss a lot of checks, cgroup handling, etc.

But maybe a flag to skip the recursion avoidance?

I think this can work, and this can also improve performance. I'll look
into this.

Thanks,
Kuai


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