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Wed, 09 Oct 2019 00:41:33 -0700 (PDT) X-Google-Smtp-Source: APXvYqyHkBK4xiTE3izO6J9VCbcfdAGwtWs5QRjTXypAY/ib7aR15lQSUQgpvx4dIhx/8cAOR0z2oQ== X-Received: by 2002:a17:90a:aa98:: with SMTP id l24mr2457553pjq.96.1570606893552; Wed, 09 Oct 2019 00:41:33 -0700 (PDT) Received: from xz-x1 ([209.132.188.80]) by smtp.gmail.com with ESMTPSA id 19sm1294409pjd.23.2019.10.09.00.41.26 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 09 Oct 2019 00:41:32 -0700 (PDT) Date: Wed, 9 Oct 2019 15:41:18 +0800 From: Peter Xu To: Palmer Dabbelt Cc: linux-mm@kvack.org, linux-kernel@vger.kernel.org, david@redhat.com, hughd@google.com, gokhale2@llnl.gov, jglisse@redhat.com, xemul@virtuozzo.com, hannes@cmpxchg.org, cracauer@cons.org, mcfadden8@llnl.gov, shli@fb.com, aarcange@redhat.com, mike.kravetz@oracle.com, dplotnikov@virtuozzo.com, rppt@linux.vnet.ibm.com, Linus Torvalds , mgorman@suse.de, kirill@shutemov.name, dgilbert@redhat.com Subject: Re: [PATCH v4 05/10] mm: Return faster for non-fatal signals in user mode faults Message-ID: <20191009074118.GC1039@xz-x1> References: <20190923042523.10027-6-peterx@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.11.4 (2019-03-13) 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: On Tue, Oct 08, 2019 at 03:43:19PM -0700, Palmer Dabbelt wrote: > > diff --git a/arch/riscv/mm/fault.c b/arch/riscv/mm/fault.c > > index deeb820bd855..ea8f301de65b 100644 > > --- a/arch/riscv/mm/fault.c > > +++ b/arch/riscv/mm/fault.c > > @@ -111,11 +111,12 @@ asmlinkage void do_page_fault(struct pt_regs *regs) > > fault = handle_mm_fault(vma, addr, flags); > > > > /* > > - * If we need to retry but a fatal signal is pending, handle the > > + * If we need to retry but a signal is pending, try to handle the > > * signal first. We do not need to release the mmap_sem because it > > * would already be released in __lock_page_or_retry in mm/filemap.c. > > */ > > - if ((fault & VM_FAULT_RETRY) && fatal_signal_pending(tsk)) > > + if ((fault & VM_FAULT_RETRY) && > > + fault_should_check_signal(user_mode(regs))) > > return; > > > > if (unlikely(fault & VM_FAULT_ERROR)) { > > Acked-by: Palmer Dabbelt # RISC-V parts > > I'm assuming this is going in through some other tree. Hi, Palmer, Thanks for reviewing! There's a new version here, please feel free to have a look too: https://lore.kernel.org/lkml/20190926093904.5090-1-peterx@redhat.com/ Regards, -- Peter Xu