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charset="UTF-8" Content-Transfer-Encoding: quoted-printable User-Agent: Evolution 3.54.3 (3.54.3-2.fc41) MIME-Version: 1.0 X-Rspamd-Server: rspam05 X-Rspamd-Queue-Id: 0DA3916001A X-Stat-Signature: yd1gcnww814ck7h1utpa3we1utaxcg93 X-Rspam-User: X-HE-Tag: 1764000960-413032 X-HE-Meta: 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 UFdzPen/ S7TahfBG7SdiDwkQkiEzBg0f59dn4wGJohOws6194nAgE032WAJ4NeCTyFoMuuLxuZJ6ysel8I19r/hQKW0EWgsnK2MXWZyBqngcKQHOPUsC0aum+7mVJB+aT0TpaNiOC8F/G71lVBcj2c8vlm5SpQc6UzL3CRn/h0ecTIiCyMJt3y5rEAgYOMjHUoKeMDWEWUHAW/70xf13h8bjQ+DxLpfcu85zDNjXnyLAWgq2Onm4CIlNaT/vcV0QQK7dqJXXxW2B3kqq2mIesbCv52ZaDWW5afQ== X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On Fri, 2025-11-21 at 17:52 -0800, Chris Li wrote: > On Fri, Nov 21, 2025 at 3:40=E2=80=AFAM Johannes Weiner > wrote: > >=20 > >=20 > > Zswap is primarily a compressed cache for real swap on secondary > > storage. It's indeed quite important that entries currently in > > zswap > > don't occupy disk slots; but for a solution to this to be > > acceptable, > > it has to work with the primary usecase and support disk writeback. >=20 > Well, my plan is to support the writeback via swap.tiers. >=20 How would you do writeback from a zswap entry in a ghost swapfile, to a real disk swap backend? That is the use case people are trying to solve. How would your architecture address it? --=20 All Rights Reversed.