From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To: viro@zeniv.linux.org.uk, mtk.manpages@gmail.com,
shuah@kernel.org, linux-api@vger.kernel.org
Cc: linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-man@vger.kernel.org, linux-kselftest@vger.kernel.org,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Subject: [PATCH 0/3] readfile(2): a new syscall to make open/read/close faster
Date: Sat, 4 Jul 2020 16:02:46 +0200 [thread overview]
Message-ID: <20200704140250.423345-1-gregkh@linuxfoundation.org> (raw)
Here is a tiny new syscall, readfile, that makes it simpler to read
small/medium sized files all in one shot, no need to do open/read/close.
This is especially helpful for tools that poke around in procfs or
sysfs, making a little bit of a less system load than before, especially
as syscall overheads go up over time due to various CPU bugs being
addressed.
There are 4 patches in this series, the first 3 are against the kernel
tree, adding the syscall logic, wiring up the syscall, and adding some
tests for it.
The last patch is agains the man-pages project, adding a tiny man page
to try to describe the new syscall.
Greg Kroah-Hartman (3):
readfile: implement readfile syscall
arch: wire up the readfile syscall
selftests: add readfile(2) selftests
arch/alpha/kernel/syscalls/syscall.tbl | 1 +
arch/arm/tools/syscall.tbl | 1 +
arch/arm64/include/asm/unistd.h | 2 +-
arch/arm64/include/asm/unistd32.h | 2 +
arch/ia64/kernel/syscalls/syscall.tbl | 1 +
arch/m68k/kernel/syscalls/syscall.tbl | 1 +
arch/microblaze/kernel/syscalls/syscall.tbl | 1 +
arch/mips/kernel/syscalls/syscall_n32.tbl | 1 +
arch/mips/kernel/syscalls/syscall_n64.tbl | 1 +
arch/mips/kernel/syscalls/syscall_o32.tbl | 1 +
arch/parisc/kernel/syscalls/syscall.tbl | 1 +
arch/powerpc/kernel/syscalls/syscall.tbl | 1 +
arch/s390/kernel/syscalls/syscall.tbl | 1 +
arch/sh/kernel/syscalls/syscall.tbl | 1 +
arch/sparc/kernel/syscalls/syscall.tbl | 1 +
arch/x86/entry/syscalls/syscall_32.tbl | 1 +
arch/x86/entry/syscalls/syscall_64.tbl | 1 +
arch/xtensa/kernel/syscalls/syscall.tbl | 1 +
fs/open.c | 50 +++
include/linux/syscalls.h | 2 +
include/uapi/asm-generic/unistd.h | 4 +-
tools/testing/selftests/Makefile | 1 +
tools/testing/selftests/readfile/.gitignore | 3 +
tools/testing/selftests/readfile/Makefile | 7 +
tools/testing/selftests/readfile/readfile.c | 285 +++++++++++++++++
.../selftests/readfile/readfile_speed.c | 301 ++++++++++++++++++
26 files changed, 671 insertions(+), 2 deletions(-)
create mode 100644 tools/testing/selftests/readfile/.gitignore
create mode 100644 tools/testing/selftests/readfile/Makefile
create mode 100644 tools/testing/selftests/readfile/readfile.c
create mode 100644 tools/testing/selftests/readfile/readfile_speed.c
--
2.27.0
next reply other threads:[~2020-07-04 14:03 UTC|newest]
Thread overview: 49+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-07-04 14:02 Greg Kroah-Hartman [this message]
2020-07-04 14:02 ` [PATCH 1/3] readfile: implement readfile syscall Greg Kroah-Hartman
2020-07-04 18:35 ` Geert Uytterhoeven
2020-07-04 19:14 ` Matthew Wilcox
2020-07-04 19:41 ` Miklos Szeredi
2020-07-04 20:12 ` Al Viro
2020-07-04 20:16 ` Al Viro
2020-07-04 14:02 ` [PATCH 2/3] arch: wire up the " Greg Kroah-Hartman
2020-07-04 18:36 ` Geert Uytterhoeven
2020-07-04 14:02 ` [PATCH 3/3] selftests: add readfile(2) selftests Greg Kroah-Hartman
2020-07-04 18:38 ` Geert Uytterhoeven
2020-07-05 6:55 ` Greg Kroah-Hartman
2020-07-05 11:24 ` Geert Uytterhoeven
2020-07-05 11:36 ` Greg Kroah-Hartman
2020-07-05 1:41 ` Heinrich Schuchardt
2020-07-05 7:34 ` Greg Kroah-Hartman
2020-07-05 9:46 ` Heinrich Schuchardt
2020-07-04 14:02 ` [PATCH] readfile.2: new page describing readfile(2) Greg Kroah-Hartman
2020-07-05 2:54 ` Heinrich Schuchardt
2020-07-04 19:30 ` [PATCH 0/3] readfile(2): a new syscall to make open/read/close faster Al Viro
2020-07-05 11:47 ` Greg Kroah-Hartman
2020-07-06 17:25 ` Dave Martin
2020-07-05 2:06 Jan Ziak
2020-07-05 2:16 ` Matthew Wilcox
2020-07-05 2:46 ` Jan Ziak
2020-07-05 3:12 ` Matthew Wilcox
2020-07-05 3:18 ` Jan Ziak
2020-07-05 3:27 ` Matthew Wilcox
2020-07-05 4:09 ` Jan Ziak
2020-07-05 11:58 ` Greg KH
2020-07-06 6:07 ` Jan Ziak
2020-07-06 11:11 ` Matthew Wilcox
2020-07-06 11:18 ` Greg KH
2020-07-05 8:07 ` Vito Caputo
2020-07-05 11:44 ` Greg KH
2020-07-05 20:34 ` Vito Caputo
2020-07-05 6:32 ` Andreas Dilger
2020-07-05 7:25 ` Jan Ziak
2020-07-05 12:00 ` Greg KH
2020-07-05 11:50 ` Greg KH
2020-07-14 6:51 ` Pavel Machek
2020-07-14 8:07 ` Miklos Szeredi
2020-07-14 11:34 ` Pavel Begunkov
2020-07-14 11:55 ` Miklos Szeredi
2020-07-15 8:31 ` Pavel Begunkov
2020-07-15 8:41 ` Miklos Szeredi
2020-07-15 8:49 ` Pavel Begunkov
2020-07-15 9:00 ` Pavel Begunkov
2020-07-15 11:17 ` Miklos Szeredi
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