21 May
2025
21 May
'25
5:53 a.m.
On Tue, May 20, 2025 at 11:09:15AM -0700, Bart Van Assche wrote:
If the sequential write bios are split by the device mapper, sorting bios in the block layer is not necessary. Christoph and Damien, do you agree to replace the bio sorting code in my previous email with the patch below?
No. First please create a reproducer for your issue using null_blk or scsi_debug, otherwise we have no way to understand what is going on here, and will regress in the future.
Second should very much be able to fix the splitting in dm to place the bios in the right order. As mentioned before I have a theory of how to do it, but we really need a proper reproducer to test this and then to write it up to blktests first.