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charset="UTF-8" Content-Transfer-Encoding: quoted-printable User-Agent: Evolution 3.54.1 (3.54.1-1.fc41) Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Sender: riel@surriel.com On Fri, 2025-02-07 at 15:50 +0100, Brendan Jackman wrote: > On Thu, 6 Feb 2025 at 05:45, Rik van Riel wrote: > > @@ -1276,7 +1282,7 @@ void arch_tlbbatch_flush(struct > > arch_tlbflush_unmap_batch *batch) > >=20 > > =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 int cpu =3D get_cpu(); > >=20 > > -=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 info =3D get_flush_tlb_info(NULL,= 0, TLB_FLUSH_ALL, 0, false, > > +=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 info =3D get_flush_tlb_info(NULL,= 0, TLB_FLUSH_ALL, > > PAGE_SHIFT, false, > > =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2= =A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0= =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 TLB_GENERATION_INVAL= ID); >=20 > [Why] do we need this change? If it's necessary here, why isn't it > needed everywhere else that does TLB_FLUSH_ALL too, like > flush_tlb_mm()? >=20 flush_tlb_mm() calls flush_tlb_mm_range(), which does also use get_flush_tlb_info(). We pass in PAGE_SHIFT here to ensure that the stride shift is specified correctly to the INVLPGB instruction later on. --=20 All Rights Reversed.