From: Christoph Hellwig <hch@infradead.org>
To: Jeff Layton <jlayton@kernel.org>
Cc: Zorro Lang <zlang@kernel.org>,
fstests@vger.kernel.org, linux-fsdevel@vger.kernel.org
Subject: Re: [PATCH RFC fstests] generic: add a test for multigrain timestamps
Date: Wed, 28 Oct 2026 08:54:37 -0700 [thread overview]
Message-ID: <auIavey7CFq_l38s@infradead.org> (raw)
In-Reply-To: <20261027-mgtime-v1-1-ec68914a116e@kernel.org>
On Tue, Oct 27, 2026 at 09:58:50AM -0400, Jeff Layton wrote:
> Ensure that the mtime and ctime apparently change, even when there are
> multiple writes in quick succession. Since this is opt-in for in-kernel
> filesystems and there is no way to test for this feature in userland,
> limit it to just ext4, f2fs, btrfs, tmpfs and xfs for now.
>
> Signed-off-by: Jeff Layton <jlayton@kernel.org>
> ---
> I'd like to start testing this to make sure it doesn't break, but it's
> not universally supported on all filesystems. Is an explicit allowlist
> like this the right approach?
Can we please expose the fact that multi-grain timestamp are supported
from the kernel? This seems like it would be just one bit we'd need
in sttx or something similar.
next prev parent reply other threads:[~2026-10-28 15:54 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-10-27 13:58 [PATCH RFC fstests] generic: add a test for multigrain timestamps Jeff Layton
2026-10-28 15:54 ` Christoph Hellwig [this message]
2026-10-28 17:20 ` Jeff Layton
2026-10-29 12:02 ` Christoph Hellwig
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