On Thu, Nov 09, 2023 at 03:42:40PM +0000, Matthew Wilcox wrote: > That wasn't the model we had in mind. In our thinking, it was fine to > send a write that crossed the atomic write limit, but the drive wouldn't > guarantee that it was atomic except at the atomic write boundary. > Eg with an AWUN of 16kB, you could send five 16kB writes, combine them > into a single 80kB write, and if the power failed midway through, the > drive would guarantee that it had written 0, 16kB, 32kB, 48kB, 64kB or > all 80kB. Not necessarily in order; it might have written bytes 16-32kB, > 64-80kB and not the other three. I can see some use for that, but I'm really worried that debugging problems in the I/O merging and splitting will be absolute hell.
