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SubjectRe: [PATCH v3 0/4] vm: add a syscall to map a process memory into a pipe
Hi Mike,

On 22 November 2017 at 20:36, Mike Rapoport <rppt@linux.vnet.ibm.com> wrote:
> From: Yossi Kuperman <yossiku@il.ibm.com>
>
> 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/

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