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kernel_optimize_test/arch/mips/kernel/syscalls/syscall_o32.tbl
Minchan Kim ecb8ac8b1f mm/madvise: introduce process_madvise() syscall: an external memory hinting API 
There is usecase that System Management Software(SMS) want to give a
memory hint like MADV_[COLD|PAGEEOUT] to other processes and in the
case of Android, it is the ActivityManagerService.

The information required to make the reclaim decision is not known to the
app.  Instead, it is known to the centralized userspace
daemon(ActivityManagerService), and that daemon must be able to initiate
reclaim on its own without any app involvement.

To solve the issue, this patch introduces a new syscall
process_madvise(2).  It uses pidfd of an external process to give the
hint.  It also supports vector address range because Android app has
thousands of vmas due to zygote so it's totally waste of CPU and power if
we should call the syscall one by one for each vma.(With testing 2000-vma
syscall vs 1-vector syscall, it showed 15% performance improvement.  I
think it would be bigger in real practice because the testing ran very
cache friendly environment).

Another potential use case for the vector range is to amortize the cost
ofTLB shootdowns for multiple ranges when using MADV_DONTNEED; this could
benefit users like TCP receive zerocopy and malloc implementations.  In
future, we could find more usecases for other advises so let's make it
happens as API since we introduce a new syscall at this moment.  With
that, existing madvise(2) user could replace it with process_madvise(2)
with their own pid if they want to have batch address ranges support
feature.

ince it could affect other process's address range, only privileged
process(PTRACE_MODE_ATTACH_FSCREDS) or something else(e.g., being the same
UID) gives it the right to ptrace the process could use it successfully.
The flag argument is reserved for future use if we need to extend the API.

I think supporting all hints madvise has/will supported/support to
process_madvise is rather risky.  Because we are not sure all hints make
sense from external process and implementation for the hint may rely on
the caller being in the current context so it could be error-prone.  Thus,
I just limited hints as MADV_[COLD|PAGEOUT] in this patch.

If someone want to add other hints, we could hear the usecase and review
it for each hint.  It's safer for maintenance rather than introducing a
buggy syscall but hard to fix it later.

So finally, the API is as follows,

      ssize_t process_madvise(int pidfd, const struct iovec *iovec,
                unsigned long vlen, int advice, unsigned int flags);

    DESCRIPTION
      The process_madvise() system call is used to give advice or directions
      to the kernel about the address ranges from external process as well as
      local process. It provides the advice to address ranges of process
      described by iovec and vlen. The goal of such advice is to improve
      system or application performance.

      The pidfd selects the process referred to by the PID file descriptor
      specified in pidfd. (See pidofd_open(2) for further information)

      The pointer iovec points to an array of iovec structures, defined in
      <sys/uio.h> as:

        struct iovec {
            void *iov_base;         /* starting address */
            size_t iov_len;         /* number of bytes to be advised */
        };

      The iovec describes address ranges beginning at address(iov_base)
      and with size length of bytes(iov_len).

      The vlen represents the number of elements in iovec.

      The advice is indicated in the advice argument, which is one of the
      following at this moment if the target process specified by pidfd is
      external.

        MADV_COLD
        MADV_PAGEOUT

      Permission to provide a hint to external process is governed by a
      ptrace access mode PTRACE_MODE_ATTACH_FSCREDS check; see ptrace(2).

      The process_madvise supports every advice madvise(2) has if target
      process is in same thread group with calling process so user could
      use process_madvise(2) to extend existing madvise(2) to support
      vector address ranges.

    RETURN VALUE
      On success, process_madvise() returns the number of bytes advised.
      This return value may be less than the total number of requested
      bytes, if an error occurred. The caller should check return value
      to determine whether a partial advice occurred.

FAQ:

Q.1 - Why does any external entity have better knowledge?

Quote from Sandeep

"For Android, every application (including the special SystemServer)
are forked from Zygote.  The reason of course is to share as many
libraries and classes between the two as possible to benefit from the
preloading during boot.

After applications start, (almost) all of the APIs end up calling into
this SystemServer process over IPC (binder) and back to the
application.

In a fully running system, the SystemServer monitors every single
process periodically to calculate their PSS / RSS and also decides
which process is "important" to the user for interactivity.

So, because of how these processes start _and_ the fact that the
SystemServer is looping to monitor each process, it does tend to *know*
which address range of the application is not used / useful.

Besides, we can never rely on applications to clean things up
themselves.  We've had the "hey app1, the system is low on memory,
please trim your memory usage down" notifications for a long time[1].
They rely on applications honoring the broadcasts and very few do.

So, if we want to avoid the inevitable killing of the application and
restarting it, some way to be able to tell the OS about unimportant
memory in these applications will be useful.

- ssp

Q.2 - How to guarantee the race(i.e., object validation) between when
giving a hint from an external process and get the hint from the target
process?

process_madvise operates on the target process's address space as it
exists at the instant that process_madvise is called.  If the space
target process can run between the time the process_madvise process
inspects the target process address space and the time that
process_madvise is actually called, process_madvise may operate on
memory regions that the calling process does not expect.  It's the
responsibility of the process calling process_madvise to close this
race condition.  For example, the calling process can suspend the
target process with ptrace, SIGSTOP, or the freezer cgroup so that it
doesn't have an opportunity to change its own address space before
process_madvise is called.  Another option is to operate on memory
regions that the caller knows a priori will be unchanged in the target
process.  Yet another option is to accept the race for certain
process_madvise calls after reasoning that mistargeting will do no
harm.  The suggested API itself does not provide synchronization.  It
also apply other APIs like move_pages, process_vm_write.

The race isn't really a problem though.  Why is it so wrong to require
that callers do their own synchronization in some manner?  Nobody
objects to write(2) merely because it's possible for two processes to
open the same file and clobber each other's writes --- instead, we tell
people to use flock or something.  Think about mmap.  It never
guarantees newly allocated address space is still valid when the user
tries to access it because other threads could unmap the memory right
before.  That's where we need synchronization by using other API or
design from userside.  It shouldn't be part of API itself.  If someone
needs more fine-grained synchronization rather than process level,
there were two ideas suggested - cookie[2] and anon-fd[3].  Both are
applicable via using last reserved argument of the API but I don't
think it's necessary right now since we have already ways to prevent
the race so don't want to add additional complexity with more
fine-grained optimization model.

To make the API extend, it reserved an unsigned long as last argument
so we could support it in future if someone really needs it.

Q.3 - Why doesn't ptrace work?

Injecting an madvise in the target process using ptrace would not work
for us because such injected madvise would have to be executed by the
target process, which means that process would have to be runnable and
that creates the risk of the abovementioned race and hinting a wrong
VMA.  Furthermore, we want to act the hint in caller's context, not the
callee's, because the callee is usually limited in cpuset/cgroups or
even freezed state so they can't act by themselves quick enough, which
causes more thrashing/kill.  It doesn't work if the target process are
ptraced(e.g., strace, debugger, minidump) because a process can have at
most one ptracer.

[1] https://developer.android.com/topic/performance/memory"

[2] process_getinfo for getting the cookie which is updated whenever
    vma of process address layout are changed - Daniel Colascione -
    https://lore.kernel.org/lkml/20190520035254.57579-1-minchan@kernel.org/T/#m7694416fd179b2066a2c62b5b139b14e3894e224

[3] anonymous fd which is used for the object(i.e., address range)
    validation - Michal Hocko -
    https://lore.kernel.org/lkml/20200120112722.GY18451@dhcp22.suse.cz/

[minchan@kernel.org: fix process_madvise build break for arm64]
  Link: http://lkml.kernel.org/r/20200303145756.GA219683@google.com
[minchan@kernel.org: fix build error for mips of process_madvise]
  Link: http://lkml.kernel.org/r/20200508052517.GA197378@google.com
[akpm@linux-foundation.org: fix patch ordering issue]
[akpm@linux-foundation.org: fix arm64 whoops]
[minchan@kernel.org: make process_madvise() vlen arg have type size_t, per Florian]
[akpm@linux-foundation.org: fix i386 build]
[sfr@canb.auug.org.au: fix syscall numbering]
  Link: https://lkml.kernel.org/r/20200905142639.49fc3f1a@canb.auug.org.au
[sfr@canb.auug.org.au: madvise.c needs compat.h]
  Link: https://lkml.kernel.org/r/20200908204547.285646b4@canb.auug.org.au
[minchan@kernel.org: fix mips build]
  Link: https://lkml.kernel.org/r/20200909173655.GC2435453@google.com
[yuehaibing@huawei.com: remove duplicate header which is included twice]
  Link: https://lkml.kernel.org/r/20200915121550.30584-1-yuehaibing@huawei.com
[minchan@kernel.org: do not use helper functions for process_madvise]
  Link: https://lkml.kernel.org/r/20200921175539.GB387368@google.com
[akpm@linux-foundation.org: pidfd_get_pid() gained an argument]
[sfr@canb.auug.org.au: fix up for "iov_iter: transparently handle compat iovecs in import_iovec"]
  Link: https://lkml.kernel.org/r/20200928212542.468e1fef@canb.auug.org.au

Signed-off-by: Minchan Kim <minchan@kernel.org>
Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Reviewed-by: Suren Baghdasaryan <surenb@google.com>
Reviewed-by: Vlastimil Babka <vbabka@suse.cz>
Acked-by: David Rientjes <rientjes@google.com>
Cc: Alexander Duyck <alexander.h.duyck@linux.intel.com>
Cc: Brian Geffon <bgeffon@google.com>
Cc: Christian Brauner <christian@brauner.io>
Cc: Daniel Colascione <dancol@google.com>
Cc: Jann Horn <jannh@google.com>
Cc: Jens Axboe <axboe@kernel.dk>
Cc: Joel Fernandes <joel@joelfernandes.org>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: John Dias <joaodias@google.com>
Cc: Kirill Tkhai <ktkhai@virtuozzo.com>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Oleksandr Natalenko <oleksandr@redhat.com>
Cc: Sandeep Patil <sspatil@google.com>
Cc: SeongJae Park <sj38.park@gmail.com>
Cc: SeongJae Park <sjpark@amazon.de>
Cc: Shakeel Butt <shakeelb@google.com>
Cc: Sonny Rao <sonnyrao@google.com>
Cc: Tim Murray <timmurray@google.com>
Cc: Christian Brauner <christian.brauner@ubuntu.com>
Cc: Florian Weimer <fw@deneb.enyo.de>
Cc: <linux-man@vger.kernel.org>
Link: http://lkml.kernel.org/r/20200302193630.68771-3-minchan@kernel.org
Link: http://lkml.kernel.org/r/20200508183320.GA125527@google.com
Link: http://lkml.kernel.org/r/20200622192900.22757-4-minchan@kernel.org
Link: https://lkml.kernel.org/r/20200901000633.1920247-4-minchan@kernel.org
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2020-10-18 09:27:10 -07:00

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# SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note
#
# system call numbers and entry vectors for mips
#
# The format is:
# <number> <abi> <name> <entry point> <compat entry point>
#
# The <abi> is always "o32" for this file.
#
0 o32 syscall sys_syscall sys32_syscall
1 o32 exit sys_exit
2 o32 fork __sys_fork
3 o32 read sys_read
4 o32 write sys_write
5 o32 open sys_open compat_sys_open
6 o32 close sys_close
7 o32 waitpid sys_waitpid
8 o32 creat sys_creat
9 o32 link sys_link
10 o32 unlink sys_unlink
11 o32 execve sys_execve compat_sys_execve
12 o32 chdir sys_chdir
13 o32 time sys_time32
14 o32 mknod sys_mknod
15 o32 chmod sys_chmod
16 o32 lchown sys_lchown
17 o32 break sys_ni_syscall
# 18 was sys_stat
18 o32 unused18 sys_ni_syscall
19 o32 lseek sys_lseek
20 o32 getpid sys_getpid
21 o32 mount sys_mount
22 o32 umount sys_oldumount
23 o32 setuid sys_setuid
24 o32 getuid sys_getuid
25 o32 stime sys_stime32
26 o32 ptrace sys_ptrace compat_sys_ptrace
27 o32 alarm sys_alarm
# 28 was sys_fstat
28 o32 unused28 sys_ni_syscall
29 o32 pause sys_pause
30 o32 utime sys_utime32
31 o32 stty sys_ni_syscall
32 o32 gtty sys_ni_syscall
33 o32 access sys_access
34 o32 nice sys_nice
35 o32 ftime sys_ni_syscall
36 o32 sync sys_sync
37 o32 kill sys_kill
38 o32 rename sys_rename
39 o32 mkdir sys_mkdir
40 o32 rmdir sys_rmdir
41 o32 dup sys_dup
42 o32 pipe sysm_pipe
43 o32 times sys_times compat_sys_times
44 o32 prof sys_ni_syscall
45 o32 brk sys_brk
46 o32 setgid sys_setgid
47 o32 getgid sys_getgid
48 o32 signal sys_ni_syscall
49 o32 geteuid sys_geteuid
50 o32 getegid sys_getegid
51 o32 acct sys_acct
52 o32 umount2 sys_umount
53 o32 lock sys_ni_syscall
54 o32 ioctl sys_ioctl compat_sys_ioctl
55 o32 fcntl sys_fcntl compat_sys_fcntl
56 o32 mpx sys_ni_syscall
57 o32 setpgid sys_setpgid
58 o32 ulimit sys_ni_syscall
59 o32 unused59 sys_olduname
60 o32 umask sys_umask
61 o32 chroot sys_chroot
62 o32 ustat sys_ustat compat_sys_ustat
63 o32 dup2 sys_dup2
64 o32 getppid sys_getppid
65 o32 getpgrp sys_getpgrp
66 o32 setsid sys_setsid
67 o32 sigaction sys_sigaction sys_32_sigaction
68 o32 sgetmask sys_sgetmask
69 o32 ssetmask sys_ssetmask
70 o32 setreuid sys_setreuid
71 o32 setregid sys_setregid
72 o32 sigsuspend sys_sigsuspend sys32_sigsuspend
73 o32 sigpending sys_sigpending compat_sys_sigpending
74 o32 sethostname sys_sethostname
75 o32 setrlimit sys_setrlimit compat_sys_setrlimit
76 o32 getrlimit sys_getrlimit compat_sys_getrlimit
77 o32 getrusage sys_getrusage compat_sys_getrusage
78 o32 gettimeofday sys_gettimeofday compat_sys_gettimeofday
79 o32 settimeofday sys_settimeofday compat_sys_settimeofday
80 o32 getgroups sys_getgroups
81 o32 setgroups sys_setgroups
# 82 was old_select
82 o32 reserved82 sys_ni_syscall
83 o32 symlink sys_symlink
# 84 was sys_lstat
84 o32 unused84 sys_ni_syscall
85 o32 readlink sys_readlink
86 o32 uselib sys_uselib
87 o32 swapon sys_swapon
88 o32 reboot sys_reboot
89 o32 readdir sys_old_readdir compat_sys_old_readdir
90 o32 mmap sys_mips_mmap
91 o32 munmap sys_munmap
92 o32 truncate sys_truncate compat_sys_truncate
93 o32 ftruncate sys_ftruncate compat_sys_ftruncate
94 o32 fchmod sys_fchmod
95 o32 fchown sys_fchown
96 o32 getpriority sys_getpriority
97 o32 setpriority sys_setpriority
98 o32 profil sys_ni_syscall
99 o32 statfs sys_statfs compat_sys_statfs
100 o32 fstatfs sys_fstatfs compat_sys_fstatfs
101 o32 ioperm sys_ni_syscall
102 o32 socketcall sys_socketcall compat_sys_socketcall
103 o32 syslog sys_syslog
104 o32 setitimer sys_setitimer compat_sys_setitimer
105 o32 getitimer sys_getitimer compat_sys_getitimer
106 o32 stat sys_newstat compat_sys_newstat
107 o32 lstat sys_newlstat compat_sys_newlstat
108 o32 fstat sys_newfstat compat_sys_newfstat
109 o32 unused109 sys_uname
110 o32 iopl sys_ni_syscall
111 o32 vhangup sys_vhangup
112 o32 idle sys_ni_syscall
113 o32 vm86 sys_ni_syscall
114 o32 wait4 sys_wait4 compat_sys_wait4
115 o32 swapoff sys_swapoff
116 o32 sysinfo sys_sysinfo compat_sys_sysinfo
117 o32 ipc sys_ipc compat_sys_ipc
118 o32 fsync sys_fsync
119 o32 sigreturn sys_sigreturn sys32_sigreturn
120 o32 clone __sys_clone
121 o32 setdomainname sys_setdomainname
122 o32 uname sys_newuname
123 o32 modify_ldt sys_ni_syscall
124 o32 adjtimex sys_adjtimex_time32
125 o32 mprotect sys_mprotect
126 o32 sigprocmask sys_sigprocmask compat_sys_sigprocmask
127 o32 create_module sys_ni_syscall
128 o32 init_module sys_init_module
129 o32 delete_module sys_delete_module
130 o32 get_kernel_syms sys_ni_syscall
131 o32 quotactl sys_quotactl
132 o32 getpgid sys_getpgid
133 o32 fchdir sys_fchdir
134 o32 bdflush sys_bdflush
135 o32 sysfs sys_sysfs
136 o32 personality sys_personality sys_32_personality
137 o32 afs_syscall sys_ni_syscall
138 o32 setfsuid sys_setfsuid
139 o32 setfsgid sys_setfsgid
140 o32 _llseek sys_llseek sys_32_llseek
141 o32 getdents sys_getdents compat_sys_getdents
142 o32 _newselect sys_select compat_sys_select
143 o32 flock sys_flock
144 o32 msync sys_msync
145 o32 readv sys_readv
146 o32 writev sys_writev
147 o32 cacheflush sys_cacheflush
148 o32 cachectl sys_cachectl
149 o32 sysmips __sys_sysmips
150 o32 unused150 sys_ni_syscall
151 o32 getsid sys_getsid
152 o32 fdatasync sys_fdatasync
153 o32 _sysctl sys_ni_syscall
154 o32 mlock sys_mlock
155 o32 munlock sys_munlock
156 o32 mlockall sys_mlockall
157 o32 munlockall sys_munlockall
158 o32 sched_setparam sys_sched_setparam
159 o32 sched_getparam sys_sched_getparam
160 o32 sched_setscheduler sys_sched_setscheduler
161 o32 sched_getscheduler sys_sched_getscheduler
162 o32 sched_yield sys_sched_yield
163 o32 sched_get_priority_max sys_sched_get_priority_max
164 o32 sched_get_priority_min sys_sched_get_priority_min
165 o32 sched_rr_get_interval sys_sched_rr_get_interval_time32
166 o32 nanosleep sys_nanosleep_time32
167 o32 mremap sys_mremap
168 o32 accept sys_accept
169 o32 bind sys_bind
170 o32 connect sys_connect
171 o32 getpeername sys_getpeername
172 o32 getsockname sys_getsockname
173 o32 getsockopt sys_getsockopt sys_getsockopt
174 o32 listen sys_listen
175 o32 recv sys_recv compat_sys_recv
176 o32 recvfrom sys_recvfrom compat_sys_recvfrom
177 o32 recvmsg sys_recvmsg compat_sys_recvmsg
178 o32 send sys_send
179 o32 sendmsg sys_sendmsg compat_sys_sendmsg
180 o32 sendto sys_sendto
181 o32 setsockopt sys_setsockopt sys_setsockopt
182 o32 shutdown sys_shutdown
183 o32 socket sys_socket
184 o32 socketpair sys_socketpair
185 o32 setresuid sys_setresuid
186 o32 getresuid sys_getresuid
187 o32 query_module sys_ni_syscall
188 o32 poll sys_poll
189 o32 nfsservctl sys_ni_syscall
190 o32 setresgid sys_setresgid
191 o32 getresgid sys_getresgid
192 o32 prctl sys_prctl
193 o32 rt_sigreturn sys_rt_sigreturn sys32_rt_sigreturn
194 o32 rt_sigaction sys_rt_sigaction compat_sys_rt_sigaction
195 o32 rt_sigprocmask sys_rt_sigprocmask compat_sys_rt_sigprocmask
196 o32 rt_sigpending sys_rt_sigpending compat_sys_rt_sigpending
197 o32 rt_sigtimedwait sys_rt_sigtimedwait_time32 compat_sys_rt_sigtimedwait_time32
198 o32 rt_sigqueueinfo sys_rt_sigqueueinfo compat_sys_rt_sigqueueinfo
199 o32 rt_sigsuspend sys_rt_sigsuspend compat_sys_rt_sigsuspend
200 o32 pread64 sys_pread64 sys_32_pread
201 o32 pwrite64 sys_pwrite64 sys_32_pwrite
202 o32 chown sys_chown
203 o32 getcwd sys_getcwd
204 o32 capget sys_capget
205 o32 capset sys_capset
206 o32 sigaltstack sys_sigaltstack compat_sys_sigaltstack
207 o32 sendfile sys_sendfile compat_sys_sendfile
208 o32 getpmsg sys_ni_syscall
209 o32 putpmsg sys_ni_syscall
210 o32 mmap2 sys_mips_mmap2
211 o32 truncate64 sys_truncate64 sys_32_truncate64
212 o32 ftruncate64 sys_ftruncate64 sys_32_ftruncate64
213 o32 stat64 sys_stat64 sys_newstat
214 o32 lstat64 sys_lstat64 sys_newlstat
215 o32 fstat64 sys_fstat64 sys_newfstat
216 o32 pivot_root sys_pivot_root
217 o32 mincore sys_mincore
218 o32 madvise sys_madvise
219 o32 getdents64 sys_getdents64
220 o32 fcntl64 sys_fcntl64 compat_sys_fcntl64
221 o32 reserved221 sys_ni_syscall
222 o32 gettid sys_gettid
223 o32 readahead sys_readahead sys32_readahead
224 o32 setxattr sys_setxattr
225 o32 lsetxattr sys_lsetxattr
226 o32 fsetxattr sys_fsetxattr
227 o32 getxattr sys_getxattr
228 o32 lgetxattr sys_lgetxattr
229 o32 fgetxattr sys_fgetxattr
230 o32 listxattr sys_listxattr
231 o32 llistxattr sys_llistxattr
232 o32 flistxattr sys_flistxattr
233 o32 removexattr sys_removexattr
234 o32 lremovexattr sys_lremovexattr
235 o32 fremovexattr sys_fremovexattr
236 o32 tkill sys_tkill
237 o32 sendfile64 sys_sendfile64
238 o32 futex sys_futex_time32
239 o32 sched_setaffinity sys_sched_setaffinity compat_sys_sched_setaffinity
240 o32 sched_getaffinity sys_sched_getaffinity compat_sys_sched_getaffinity
241 o32 io_setup sys_io_setup compat_sys_io_setup
242 o32 io_destroy sys_io_destroy
243 o32 io_getevents sys_io_getevents_time32
244 o32 io_submit sys_io_submit compat_sys_io_submit
245 o32 io_cancel sys_io_cancel
246 o32 exit_group sys_exit_group
247 o32 lookup_dcookie sys_lookup_dcookie compat_sys_lookup_dcookie
248 o32 epoll_create sys_epoll_create
249 o32 epoll_ctl sys_epoll_ctl
250 o32 epoll_wait sys_epoll_wait
251 o32 remap_file_pages sys_remap_file_pages
252 o32 set_tid_address sys_set_tid_address
253 o32 restart_syscall sys_restart_syscall
254 o32 fadvise64 sys_fadvise64_64 sys32_fadvise64_64
255 o32 statfs64 sys_statfs64 compat_sys_statfs64
256 o32 fstatfs64 sys_fstatfs64 compat_sys_fstatfs64
257 o32 timer_create sys_timer_create compat_sys_timer_create
258 o32 timer_settime sys_timer_settime32
259 o32 timer_gettime sys_timer_gettime32
260 o32 timer_getoverrun sys_timer_getoverrun
261 o32 timer_delete sys_timer_delete
262 o32 clock_settime sys_clock_settime32
263 o32 clock_gettime sys_clock_gettime32
264 o32 clock_getres sys_clock_getres_time32
265 o32 clock_nanosleep sys_clock_nanosleep_time32
266 o32 tgkill sys_tgkill
267 o32 utimes sys_utimes_time32
268 o32 mbind sys_mbind compat_sys_mbind
269 o32 get_mempolicy sys_get_mempolicy compat_sys_get_mempolicy
270 o32 set_mempolicy sys_set_mempolicy compat_sys_set_mempolicy
271 o32 mq_open sys_mq_open compat_sys_mq_open
272 o32 mq_unlink sys_mq_unlink
273 o32 mq_timedsend sys_mq_timedsend_time32
274 o32 mq_timedreceive sys_mq_timedreceive_time32
275 o32 mq_notify sys_mq_notify compat_sys_mq_notify
276 o32 mq_getsetattr sys_mq_getsetattr compat_sys_mq_getsetattr
277 o32 vserver sys_ni_syscall
278 o32 waitid sys_waitid compat_sys_waitid
# 279 was sys_setaltroot
280 o32 add_key sys_add_key
281 o32 request_key sys_request_key
282 o32 keyctl sys_keyctl compat_sys_keyctl
283 o32 set_thread_area sys_set_thread_area
284 o32 inotify_init sys_inotify_init
285 o32 inotify_add_watch sys_inotify_add_watch
286 o32 inotify_rm_watch sys_inotify_rm_watch
287 o32 migrate_pages sys_migrate_pages compat_sys_migrate_pages
288 o32 openat sys_openat compat_sys_openat
289 o32 mkdirat sys_mkdirat
290 o32 mknodat sys_mknodat
291 o32 fchownat sys_fchownat
292 o32 futimesat sys_futimesat_time32
293 o32 fstatat64 sys_fstatat64 sys_newfstatat
294 o32 unlinkat sys_unlinkat
295 o32 renameat sys_renameat
296 o32 linkat sys_linkat
297 o32 symlinkat sys_symlinkat
298 o32 readlinkat sys_readlinkat
299 o32 fchmodat sys_fchmodat
300 o32 faccessat sys_faccessat
301 o32 pselect6 sys_pselect6_time32 compat_sys_pselect6_time32
302 o32 ppoll sys_ppoll_time32 compat_sys_ppoll_time32
303 o32 unshare sys_unshare
304 o32 splice sys_splice
305 o32 sync_file_range sys_sync_file_range sys32_sync_file_range
306 o32 tee sys_tee
307 o32 vmsplice sys_vmsplice
308 o32 move_pages sys_move_pages compat_sys_move_pages
309 o32 set_robust_list sys_set_robust_list compat_sys_set_robust_list
310 o32 get_robust_list sys_get_robust_list compat_sys_get_robust_list
311 o32 kexec_load sys_kexec_load compat_sys_kexec_load
312 o32 getcpu sys_getcpu
313 o32 epoll_pwait sys_epoll_pwait compat_sys_epoll_pwait
314 o32 ioprio_set sys_ioprio_set
315 o32 ioprio_get sys_ioprio_get
316 o32 utimensat sys_utimensat_time32
317 o32 signalfd sys_signalfd compat_sys_signalfd
318 o32 timerfd sys_ni_syscall
319 o32 eventfd sys_eventfd
320 o32 fallocate sys_fallocate sys32_fallocate
321 o32 timerfd_create sys_timerfd_create
322 o32 timerfd_gettime sys_timerfd_gettime32
323 o32 timerfd_settime sys_timerfd_settime32
324 o32 signalfd4 sys_signalfd4 compat_sys_signalfd4
325 o32 eventfd2 sys_eventfd2
326 o32 epoll_create1 sys_epoll_create1
327 o32 dup3 sys_dup3
328 o32 pipe2 sys_pipe2
329 o32 inotify_init1 sys_inotify_init1
330 o32 preadv sys_preadv compat_sys_preadv
331 o32 pwritev sys_pwritev compat_sys_pwritev
332 o32 rt_tgsigqueueinfo sys_rt_tgsigqueueinfo compat_sys_rt_tgsigqueueinfo
333 o32 perf_event_open sys_perf_event_open
334 o32 accept4 sys_accept4
335 o32 recvmmsg sys_recvmmsg_time32 compat_sys_recvmmsg_time32
336 o32 fanotify_init sys_fanotify_init
337 o32 fanotify_mark sys_fanotify_mark compat_sys_fanotify_mark
338 o32 prlimit64 sys_prlimit64
339 o32 name_to_handle_at sys_name_to_handle_at
340 o32 open_by_handle_at sys_open_by_handle_at compat_sys_open_by_handle_at
341 o32 clock_adjtime sys_clock_adjtime32
342 o32 syncfs sys_syncfs
343 o32 sendmmsg sys_sendmmsg compat_sys_sendmmsg
344 o32 setns sys_setns
345 o32 process_vm_readv sys_process_vm_readv
346 o32 process_vm_writev sys_process_vm_writev
347 o32 kcmp sys_kcmp
348 o32 finit_module sys_finit_module
349 o32 sched_setattr sys_sched_setattr
350 o32 sched_getattr sys_sched_getattr
351 o32 renameat2 sys_renameat2
352 o32 seccomp sys_seccomp
353 o32 getrandom sys_getrandom
354 o32 memfd_create sys_memfd_create
355 o32 bpf sys_bpf
356 o32 execveat sys_execveat compat_sys_execveat
357 o32 userfaultfd sys_userfaultfd
358 o32 membarrier sys_membarrier
359 o32 mlock2 sys_mlock2
360 o32 copy_file_range sys_copy_file_range
361 o32 preadv2 sys_preadv2 compat_sys_preadv2
362 o32 pwritev2 sys_pwritev2 compat_sys_pwritev2
363 o32 pkey_mprotect sys_pkey_mprotect
364 o32 pkey_alloc sys_pkey_alloc
365 o32 pkey_free sys_pkey_free
366 o32 statx sys_statx
367 o32 rseq sys_rseq
368 o32 io_pgetevents sys_io_pgetevents_time32 compat_sys_io_pgetevents
# room for arch specific calls
393 o32 semget sys_semget
394 o32 semctl sys_semctl compat_sys_semctl
395 o32 shmget sys_shmget
396 o32 shmctl sys_shmctl compat_sys_shmctl
397 o32 shmat sys_shmat compat_sys_shmat
398 o32 shmdt sys_shmdt
399 o32 msgget sys_msgget
400 o32 msgsnd sys_msgsnd compat_sys_msgsnd
401 o32 msgrcv sys_msgrcv compat_sys_msgrcv
402 o32 msgctl sys_msgctl compat_sys_msgctl
403 o32 clock_gettime64 sys_clock_gettime sys_clock_gettime
404 o32 clock_settime64 sys_clock_settime sys_clock_settime
405 o32 clock_adjtime64 sys_clock_adjtime sys_clock_adjtime
406 o32 clock_getres_time64 sys_clock_getres sys_clock_getres
407 o32 clock_nanosleep_time64 sys_clock_nanosleep sys_clock_nanosleep
408 o32 timer_gettime64 sys_timer_gettime sys_timer_gettime
409 o32 timer_settime64 sys_timer_settime sys_timer_settime
410 o32 timerfd_gettime64 sys_timerfd_gettime sys_timerfd_gettime
411 o32 timerfd_settime64 sys_timerfd_settime sys_timerfd_settime
412 o32 utimensat_time64 sys_utimensat sys_utimensat
413 o32 pselect6_time64 sys_pselect6 compat_sys_pselect6_time64
414 o32 ppoll_time64 sys_ppoll compat_sys_ppoll_time64
416 o32 io_pgetevents_time64 sys_io_pgetevents sys_io_pgetevents
417 o32 recvmmsg_time64 sys_recvmmsg compat_sys_recvmmsg_time64
418 o32 mq_timedsend_time64 sys_mq_timedsend sys_mq_timedsend
419 o32 mq_timedreceive_time64 sys_mq_timedreceive sys_mq_timedreceive
420 o32 semtimedop_time64 sys_semtimedop sys_semtimedop
421 o32 rt_sigtimedwait_time64 sys_rt_sigtimedwait compat_sys_rt_sigtimedwait_time64
422 o32 futex_time64 sys_futex sys_futex
423 o32 sched_rr_get_interval_time64 sys_sched_rr_get_interval sys_sched_rr_get_interval
424 o32 pidfd_send_signal sys_pidfd_send_signal
425 o32 io_uring_setup sys_io_uring_setup
426 o32 io_uring_enter sys_io_uring_enter
427 o32 io_uring_register sys_io_uring_register
428 o32 open_tree sys_open_tree
429 o32 move_mount sys_move_mount
430 o32 fsopen sys_fsopen
431 o32 fsconfig sys_fsconfig
432 o32 fsmount sys_fsmount
433 o32 fspick sys_fspick
434 o32 pidfd_open sys_pidfd_open
435 o32 clone3 __sys_clone3
436 o32 close_range sys_close_range
437 o32 openat2 sys_openat2
438 o32 pidfd_getfd sys_pidfd_getfd
439 o32 faccessat2 sys_faccessat2
440 o32 process_madvise sys_process_madvise
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