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Re: Commit 'iomap: add support for dma aligned direct-io' causes qemu/KV
From: |
Christoph Hellwig |
Subject: |
Re: Commit 'iomap: add support for dma aligned direct-io' causes qemu/KVM boot failures |
Date: |
Thu, 29 Sep 2022 18:39:31 +0200 |
User-agent: |
Mutt/1.5.17 (2007-11-01) |
On Thu, Sep 29, 2022 at 10:37:22AM -0600, Keith Busch wrote:
> I don't think so. Memory alignment and length granularity are two completely
> different concepts. If anything, the kernel's ABI had been that the length
> requirement was also required for the memory alignment, not the other way
> around. That usage will continue working with this kernel patch.
Well, Linus does treat anything that breaks significant userspace
as a regression. Qemu certainly is significant, but that might depend
on bit how common configurations hitting this issue are.
Re: Commit 'iomap: add support for dma aligned direct-io' causes qemu/KVM boot failures, Thorsten Leemhuis, 2022/09/30