NetBSD-Bugs archive
[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index][Old Index]
Re: kern/60084: swap encryption: per-page tracking seems overengineered
The following reply was made to PR kern/60084; it has been noted by GNATS.
From: Takashi Yamamoto <imuwoto2%gmail.com@localhost>
To: gnats-bugs%netbsd.org@localhost
Cc: kern-bug-people%netbsd.org@localhost, gnats-admin%netbsd.org@localhost, netbsd-bugs%netbsd.org@localhost,
imuwoto%gmail.com@localhost, riastradh%netbsd.org@localhost
Subject: Re: kern/60084: swap encryption: per-page tracking seems overengineered
Date: Tue, 17 Mar 2026 17:31:33 +0900
--0000000000008297cd064d342a06
Content-Type: text/plain; charset="UTF-8"
hi,
> my proposal is just a global knob (vm.swap_encrypt) which can't be
> changed if any swap devices are configured.
here's a patch.
identical patch is available at
https://github.com/yamt/netbsd-src/commit/471d17d6708677e778c2e6d82afd5d6041863f10
--0000000000008297cd064d342a06
Content-Type: application/octet-stream; name="a.diff"
Content-Disposition: attachment; filename="a.diff"
Content-Transfer-Encoding: base64
Content-ID: <f_mmucqn2i0>
X-Attachment-Id: f_mmucqn2i0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--0000000000008297cd064d342a06--
Home |
Main Index |
Thread Index |
Old Index