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SubjectRe: [PATCH v3 0/4] vm: add a syscall to map a process memory into a pipe
On Wed, Nov 22, 2017 at 09:43:31PM +0100, Michael Kerrisk (man-pages) wrote:
> Hi Mike,
>
> On 22 November 2017 at 20:36, Mike Rapoport <rppt@linux.vnet.ibm.com> wrote:
> > 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?

It's still WIP, I'll send it out soon.

> 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/
>

--
Sincerely yours,
Mike.

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