From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Michael Kerrisk (man-pages)" Subject: Re: [PATCH v3 0/4] vm: add a syscall to map a process memory into a pipe Date: Wed, 22 Nov 2017 21:43:31 +0100 Message-ID: References: <1511379391-988-1-git-send-email-rppt@linux.vnet.ibm.com> Reply-To: mtk.manpages@gmail.com Mime-Version: 1.0 Content-Type: text/plain; charset="UTF-8" Return-path: In-Reply-To: <1511379391-988-1-git-send-email-rppt@linux.vnet.ibm.com> Sender: linux-fsdevel-owner@vger.kernel.org To: Mike Rapoport Cc: Andrew Morton , Alexander Viro , "linux-mm@kvack.org" , "linux-fsdevel@vger.kernel.org" , lkml , Linux API , criu@openvz.org, Arnd Bergmann , Pavel Emelyanov , Thomas Gleixner , Josh Triplett , Jann Horn , Yossi Kuperman List-Id: linux-api@vger.kernel.org Hi Mike, On 22 November 2017 at 20:36, Mike Rapoport wrote: > From: Yossi Kuperman > > Hi, > > This patches introduces new process_vmsplice system call that combines > functionality of process_vm_read and vmsplice. > > It allows to map the memory of another process into a pipe, similarly to > what vmsplice does for its own address space. > > The patch 2/4 ("vm: add a syscall to map a process memory into a pipe") > actually adds the new system call and provides its elaborate description. Where is the man page for this new syscall? Cheers, Michael > The patchset is against -mm tree. > > v3: minor refactoring to reduce code duplication > v2: move this syscall under CONFIG_CROSS_MEMORY_ATTACH > give correct flags to get_user_pages_remote() > > Andrei Vagin (3): > vm: add a syscall to map a process memory into a pipe > x86: wire up the process_vmsplice syscall > test: add a test for the process_vmsplice syscall > > Mike Rapoport (1): > fs/splice: introduce pages_to_pipe helper > > arch/x86/entry/syscalls/syscall_32.tbl | 1 + > arch/x86/entry/syscalls/syscall_64.tbl | 2 + > fs/splice.c | 262 +++++++++++++++++++-- > include/linux/compat.h | 3 + > include/linux/syscalls.h | 4 + > include/uapi/asm-generic/unistd.h | 5 +- > kernel/sys_ni.c | 2 + > tools/testing/selftests/process_vmsplice/Makefile | 5 + > .../process_vmsplice/process_vmsplice_test.c | 188 +++++++++++++++ > 9 files changed, 450 insertions(+), 22 deletions(-) > create mode 100644 tools/testing/selftests/process_vmsplice/Makefile > create mode 100644 tools/testing/selftests/process_vmsplice/process_vmsplice_test.c > > -- > 2.7.4 > -- Michael Kerrisk Linux man-pages maintainer; http://www.kernel.org/doc/man-pages/ Linux/UNIX System Programming Training: http://man7.org/training/