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[50.32.2.77]) by smtp.gmail.com with ESMTPSA id d75a77b69052e-51c41ab77dcsm42756101cf.2.2026.07.04.08.29.05 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 04 Jul 2026 08:29:06 -0700 (PDT) Date: Sat, 4 Jul 2026 11:29:03 -0400 From: Gregory Price To: Matthew Wilcox Cc: linux-kernel@vger.kernel.org, linux-doc@vger.kernel.org, corbet@lwn.net, skhan@linuxfoundation.org, tglx@kernel.org, peterz@infradead.org, luto@kernel.org, akpm@linux-foundation.org, feng.tang@linux.alibaba.com, pmladek@suse.com, lance.yang@linux.dev, marc.herbert@linux.intel.com, kees@kernel.org, leitao@debian.org, joel.granados@kernel.org, lirongqing@baidu.com, nathan@kernel.org, xur@google.com, lukas.bulwahn@redhat.com, ryan.roberts@arm.com Subject: Re: [PATCH v2 1/2] syscall_user_dispatch: Make it configurable in Kconfig Message-ID: References: <20260704015859.536580-1-gourry@gourry.net> <20260704015859.536580-2-gourry@gourry.net> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: On Sat, Jul 04, 2026 at 04:22:20PM +0100, Matthew Wilcox wrote: > On Fri, Jul 03, 2026 at 09:58:58PM -0400, Gregory Price wrote: > > +config SYSCALL_USER_DISPATCH > > + bool "Syscall User Dispatch" > > + depends on GENERIC_ENTRY > > + default y > > + help > > + Syscall User Dispatch lets a thread have its own system calls outside > > + an allowed IP address range to be intercepted and redirected to a > > + userspace signal handler. > > I was very confused when I read this. IP expands to Internet Protocol > long before it gets to Instruction Pointer in my brain. Hah, fair, i was just going with tglx's [1] explanation. https://lore.kernel.org/all/87a4s8m69c.ffs@fw13/