From: Christoph Hellwig <hch@lst.de>
To: Keith Busch <kbusch@kernel.org>
Cc: Maxim Levitsky <mlevitsk@redhat.com>,
linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org,
Christoph Hellwig <hch@lst.de>,
qemu-devel@nongnu.org, kvm@vger.kernel.org,
Kevin Wolf <kwolf@redhat.com>
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 [thread overview]
Message-ID: <20220929163931.GA10232@lst.de> (raw)
In-Reply-To: <YzXJwmP8pa3WABEG@kbusch-mbp.dhcp.thefacebook.com>
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.
next prev parent reply other threads:[~2022-09-29 16:39 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-09-29 15:41 Commit 'iomap: add support for dma aligned direct-io' causes qemu/KVM boot failures Maxim Levitsky
2022-09-29 15:48 ` Keith Busch
2022-09-29 16:16 ` Maxim Levitsky
2022-09-29 16:37 ` Keith Busch
2022-09-29 16:39 ` Christoph Hellwig [this message]
2022-09-29 17:35 ` Paolo Bonzini
2022-10-02 8:59 ` Maxim Levitsky
2022-10-02 13:56 ` Keith Busch
2022-10-03 7:06 ` Maxim Levitsky
2022-09-30 11:52 ` Thorsten Leemhuis
2022-11-04 11:59 ` Commit 'iomap: add support for dma aligned direct-io' causes qemu/KVM boot failures #forregzbot Thorsten Leemhuis
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