Re: [PATCH RFC 0/3] md/raid1: data corruption with serialization

在 2026/2/5 8:34, Xiao Ni 写道:
> I know the reason why it needs serialization for writemostly case. At
> first, I asked the same question if we need to handle overlap if a
> filesystem is on raid. I got the answer from AI, filesystem can submit
> overlap bios simultaneously, maybe it's the reason why
> serialize_policy was introduced? And database is another case which
> can write to raid1 directly without a filesystem. So I started this
> job. If we don't need to consider overlap, why do we need
> serialize_policy? cc guoqing who is the author of serialize_policy
> also.

Please don't just trust answer from AI, filesystem can't submit overlap
bios concurrently. And I already said serialize_policy is for writemostly
case.

And I also said we don't need to consider user manage data on raw disk
and write to same area concurrently, database will not do this.

The reason is not complicated, if you write to the same LBA concurrent,
it's pointless because you don't know what you'll read after that.

-- 
Thansk,
Kuai