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7296004bd2
Accept only one "region value" pair entry for the dmem.max, dmem.min, dmem.low files. This changes the UAPI that otherwise accepted multiple lines for setting multiple entries in one write. No existing user is known to rely on writing multiple regions in a single write. Processing multiple regions in dmemcg_limit_write() could quietly change first limits before failing on a later one and returning an error to the writer, with no indication some changes occurred. Acked-by: Tejun Heo <tj@kernel.org> Signed-off-by: Eric Chanudet <echanude@redhat.com> Reviewed-by: Maxime Ripard <mripard@kernel.org> Reviewed-by: Thadeu Lima de Souza Cascardo <cascardo@igalia.com> Tested-by: Thadeu Lima de Souza Cascardo <cascardo@igalia.com> Reviewed-by: Natalie Vock <natalie.vock@gmx.de> Link: https://patch.msgid.link/20260608-cgroup-dmem-write-single-region-v2-1-b0cd6c4ccf1b@redhat.com Signed-off-by: Maarten Lankhorst <dev@lankhorst.se>