Any one knows why sgl_threshold was set as 32k by default for NVMe SGL
 

Hi,

Recently, I'm working on NVMe SGL related, and I observed the default sgl_threshold was set as 32K by default in NVMe driver. Just wondering what the background is to set with this value instead of others.

Regards,
Jinghai

Looks like the cost of setting up the SGL outweighs the benefit for I/O smaller than 32k. https://lore.kernel.org/all/04aaed5c...ellanox.com/T/

I appreciate your response, it is really helpful.