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Shutemov" To: Peter Zijlstra Cc: Andy Lutomirski , Rick P Edgecombe , Linux Kernel Mailing List , "H.J. Lu" , "linux-mm@kvack.org" , Dave Hansen , "andreyknvl@gmail.com" , "kcc@google.com" , Andi Kleen , "dvyukov@google.com" , the arch/x86 maintainers , "ryabinin.a.a@gmail.com" , "glider@google.com" Subject: Re: [PATCHv3 6/8] x86/mm: Provide ARCH_GET_UNTAG_MASK and ARCH_ENABLE_TAGGED_ADDR Message-ID: <20220616165413.c35yliaxbxvmwsqw@black.fi.intel.com> References: <20220610143527.22974-1-kirill.shutemov@linux.intel.com> <20220610143527.22974-7-kirill.shutemov@linux.intel.com> <20220610180635.l44opq2votd3gxpl@black.fi.intel.com> <5b56c88e477d879e5a0e3c15627cb05901a812f4.camel@intel.com> <5d3b281f-3d8b-4bbd-9681-b226810c3e8b@www.fastmail.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: X-Spam-Status: No, score=-4.9 required=5.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_EF,RCVD_IN_DNSWL_MED,SPF_HELO_NONE, SPF_NONE,T_SCC_BODY_TEXT_LINE autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thu, Jun 16, 2022 at 11:44:59AM +0200, Peter Zijlstra wrote: > > get_nr_threads() is the wrong thing. Either look at mm->mm_users or > > find a way to get rid of this restriction entirely. > > mm->mm_users should indeed be sufficient here. Hm. kthread_use_mm() doesn't bump mm_users. Do we care? -- Kirill A. Shutemov