From: Robert White <rwhite@pobox.com>
To: Btrfs BTRFS <linux-btrfs@vger.kernel.org>
Subject: NOCOW and Swap Files?
Date: Wed, 22 Oct 2014 13:08:48 -0700 [thread overview]
Message-ID: <54480ED0.9070703@pobox.com> (raw)
So the documentation is clear that you can't mount a swap file through
BTRFS (unless you use a loop device).
Why isn't a NOCOW file that has been fully pre-allocated -- as with
fallocate(1) -- not suitable for swapping?
I found one reference to an unimplemented feature necessary for swap,
but wouldn't it be reasonable for that feature to exist for NOCOW files?
(or does this relate to my previous questions about the COW operation
that happens after a snapshot?)
next reply other threads:[~2014-10-22 20:08 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-10-22 20:08 Robert White [this message]
2014-10-22 20:25 ` NOCOW and Swap Files? Hugo Mills
2014-10-22 20:39 ` Robert White
2014-10-22 20:42 ` Hugo Mills
2014-10-22 20:48 ` Robert White
2014-10-23 7:34 ` Russell Coker
2014-10-23 11:22 ` Austin S Hemmelgarn
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