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kernel_optimize_test/arch/mips/kernel/syscalls/syscall_n32.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 "n32" for this file.
#
0 n32 read sys_read
1 n32 write sys_write
2 n32 open sys_open
3 n32 close sys_close
4 n32 stat sys_newstat
5 n32 fstat sys_newfstat
6 n32 lstat sys_newlstat
7 n32 poll sys_poll
8 n32 lseek sys_lseek
9 n32 mmap sys_mips_mmap
10 n32 mprotect sys_mprotect
11 n32 munmap sys_munmap
12 n32 brk sys_brk
13 n32 rt_sigaction compat_sys_rt_sigaction
14 n32 rt_sigprocmask compat_sys_rt_sigprocmask
15 n32 ioctl compat_sys_ioctl
16 n32 pread64 sys_pread64
17 n32 pwrite64 sys_pwrite64
18 n32 readv sys_readv
19 n32 writev sys_writev
20 n32 access sys_access
21 n32 pipe sysm_pipe
22 n32 _newselect compat_sys_select
23 n32 sched_yield sys_sched_yield
24 n32 mremap sys_mremap
25 n32 msync sys_msync
26 n32 mincore sys_mincore
27 n32 madvise sys_madvise
28 n32 shmget sys_shmget
29 n32 shmat sys_shmat
30 n32 shmctl compat_sys_old_shmctl
31 n32 dup sys_dup
32 n32 dup2 sys_dup2
33 n32 pause sys_pause
34 n32 nanosleep sys_nanosleep_time32
35 n32 getitimer compat_sys_getitimer
36 n32 setitimer compat_sys_setitimer
37 n32 alarm sys_alarm
38 n32 getpid sys_getpid
39 n32 sendfile compat_sys_sendfile
40 n32 socket sys_socket
41 n32 connect sys_connect
42 n32 accept sys_accept
43 n32 sendto sys_sendto
44 n32 recvfrom compat_sys_recvfrom
45 n32 sendmsg compat_sys_sendmsg
46 n32 recvmsg compat_sys_recvmsg
47 n32 shutdown sys_shutdown
48 n32 bind sys_bind
49 n32 listen sys_listen
50 n32 getsockname sys_getsockname
51 n32 getpeername sys_getpeername
52 n32 socketpair sys_socketpair
53 n32 setsockopt sys_setsockopt
54 n32 getsockopt sys_getsockopt
55 n32 clone __sys_clone
56 n32 fork __sys_fork
57 n32 execve compat_sys_execve
58 n32 exit sys_exit
59 n32 wait4 compat_sys_wait4
60 n32 kill sys_kill
61 n32 uname sys_newuname
62 n32 semget sys_semget
63 n32 semop sys_semop
64 n32 semctl compat_sys_old_semctl
65 n32 shmdt sys_shmdt
66 n32 msgget sys_msgget
67 n32 msgsnd compat_sys_msgsnd
68 n32 msgrcv compat_sys_msgrcv
69 n32 msgctl compat_sys_old_msgctl
70 n32 fcntl compat_sys_fcntl
71 n32 flock sys_flock
72 n32 fsync sys_fsync
73 n32 fdatasync sys_fdatasync
74 n32 truncate sys_truncate
75 n32 ftruncate sys_ftruncate
76 n32 getdents compat_sys_getdents
77 n32 getcwd sys_getcwd
78 n32 chdir sys_chdir
79 n32 fchdir sys_fchdir
80 n32 rename sys_rename
81 n32 mkdir sys_mkdir
82 n32 rmdir sys_rmdir
83 n32 creat sys_creat
84 n32 link sys_link
85 n32 unlink sys_unlink
86 n32 symlink sys_symlink
87 n32 readlink sys_readlink
88 n32 chmod sys_chmod
89 n32 fchmod sys_fchmod
90 n32 chown sys_chown
91 n32 fchown sys_fchown
92 n32 lchown sys_lchown
93 n32 umask sys_umask
94 n32 gettimeofday compat_sys_gettimeofday
95 n32 getrlimit compat_sys_getrlimit
96 n32 getrusage compat_sys_getrusage
97 n32 sysinfo compat_sys_sysinfo
98 n32 times compat_sys_times
99 n32 ptrace compat_sys_ptrace
100 n32 getuid sys_getuid
101 n32 syslog sys_syslog
102 n32 getgid sys_getgid
103 n32 setuid sys_setuid
104 n32 setgid sys_setgid
105 n32 geteuid sys_geteuid
106 n32 getegid sys_getegid
107 n32 setpgid sys_setpgid
108 n32 getppid sys_getppid
109 n32 getpgrp sys_getpgrp
110 n32 setsid sys_setsid
111 n32 setreuid sys_setreuid
112 n32 setregid sys_setregid
113 n32 getgroups sys_getgroups
114 n32 setgroups sys_setgroups
115 n32 setresuid sys_setresuid
116 n32 getresuid sys_getresuid
117 n32 setresgid sys_setresgid
118 n32 getresgid sys_getresgid
119 n32 getpgid sys_getpgid
120 n32 setfsuid sys_setfsuid
121 n32 setfsgid sys_setfsgid
122 n32 getsid sys_getsid
123 n32 capget sys_capget
124 n32 capset sys_capset
125 n32 rt_sigpending compat_sys_rt_sigpending
126 n32 rt_sigtimedwait compat_sys_rt_sigtimedwait_time32
127 n32 rt_sigqueueinfo compat_sys_rt_sigqueueinfo
128 n32 rt_sigsuspend compat_sys_rt_sigsuspend
129 n32 sigaltstack compat_sys_sigaltstack
130 n32 utime sys_utime32
131 n32 mknod sys_mknod
132 n32 personality sys_32_personality
133 n32 ustat compat_sys_ustat
134 n32 statfs compat_sys_statfs
135 n32 fstatfs compat_sys_fstatfs
136 n32 sysfs sys_sysfs
137 n32 getpriority sys_getpriority
138 n32 setpriority sys_setpriority
139 n32 sched_setparam sys_sched_setparam
140 n32 sched_getparam sys_sched_getparam
141 n32 sched_setscheduler sys_sched_setscheduler
142 n32 sched_getscheduler sys_sched_getscheduler
143 n32 sched_get_priority_max sys_sched_get_priority_max
144 n32 sched_get_priority_min sys_sched_get_priority_min
145 n32 sched_rr_get_interval sys_sched_rr_get_interval_time32
146 n32 mlock sys_mlock
147 n32 munlock sys_munlock
148 n32 mlockall sys_mlockall
149 n32 munlockall sys_munlockall
150 n32 vhangup sys_vhangup
151 n32 pivot_root sys_pivot_root
152 n32 _sysctl sys_ni_syscall
153 n32 prctl sys_prctl
154 n32 adjtimex sys_adjtimex_time32
155 n32 setrlimit compat_sys_setrlimit
156 n32 chroot sys_chroot
157 n32 sync sys_sync
158 n32 acct sys_acct
159 n32 settimeofday compat_sys_settimeofday
160 n32 mount sys_mount
161 n32 umount2 sys_umount
162 n32 swapon sys_swapon
163 n32 swapoff sys_swapoff
164 n32 reboot sys_reboot
165 n32 sethostname sys_sethostname
166 n32 setdomainname sys_setdomainname
167 n32 create_module sys_ni_syscall
168 n32 init_module sys_init_module
169 n32 delete_module sys_delete_module
170 n32 get_kernel_syms sys_ni_syscall
171 n32 query_module sys_ni_syscall
172 n32 quotactl sys_quotactl
173 n32 nfsservctl sys_ni_syscall
174 n32 getpmsg sys_ni_syscall
175 n32 putpmsg sys_ni_syscall
176 n32 afs_syscall sys_ni_syscall
# 177 reserved for security
177 n32 reserved177 sys_ni_syscall
178 n32 gettid sys_gettid
179 n32 readahead sys_readahead
180 n32 setxattr sys_setxattr
181 n32 lsetxattr sys_lsetxattr
182 n32 fsetxattr sys_fsetxattr
183 n32 getxattr sys_getxattr
184 n32 lgetxattr sys_lgetxattr
185 n32 fgetxattr sys_fgetxattr
186 n32 listxattr sys_listxattr
187 n32 llistxattr sys_llistxattr
188 n32 flistxattr sys_flistxattr
189 n32 removexattr sys_removexattr
190 n32 lremovexattr sys_lremovexattr
191 n32 fremovexattr sys_fremovexattr
192 n32 tkill sys_tkill
193 n32 reserved193 sys_ni_syscall
194 n32 futex sys_futex_time32
195 n32 sched_setaffinity compat_sys_sched_setaffinity
196 n32 sched_getaffinity compat_sys_sched_getaffinity
197 n32 cacheflush sys_cacheflush
198 n32 cachectl sys_cachectl
199 n32 sysmips __sys_sysmips
200 n32 io_setup compat_sys_io_setup
201 n32 io_destroy sys_io_destroy
202 n32 io_getevents sys_io_getevents_time32
203 n32 io_submit compat_sys_io_submit
204 n32 io_cancel sys_io_cancel
205 n32 exit_group sys_exit_group
206 n32 lookup_dcookie sys_lookup_dcookie
207 n32 epoll_create sys_epoll_create
208 n32 epoll_ctl sys_epoll_ctl
209 n32 epoll_wait sys_epoll_wait
210 n32 remap_file_pages sys_remap_file_pages
211 n32 rt_sigreturn sysn32_rt_sigreturn
212 n32 fcntl64 compat_sys_fcntl64
213 n32 set_tid_address sys_set_tid_address
214 n32 restart_syscall sys_restart_syscall
215 n32 semtimedop sys_semtimedop_time32
216 n32 fadvise64 sys_fadvise64_64
217 n32 statfs64 compat_sys_statfs64
218 n32 fstatfs64 compat_sys_fstatfs64
219 n32 sendfile64 sys_sendfile64
220 n32 timer_create compat_sys_timer_create
221 n32 timer_settime sys_timer_settime32
222 n32 timer_gettime sys_timer_gettime32
223 n32 timer_getoverrun sys_timer_getoverrun
224 n32 timer_delete sys_timer_delete
225 n32 clock_settime sys_clock_settime32
226 n32 clock_gettime sys_clock_gettime32
227 n32 clock_getres sys_clock_getres_time32
228 n32 clock_nanosleep sys_clock_nanosleep_time32
229 n32 tgkill sys_tgkill
230 n32 utimes sys_utimes_time32
231 n32 mbind compat_sys_mbind
232 n32 get_mempolicy compat_sys_get_mempolicy
233 n32 set_mempolicy compat_sys_set_mempolicy
234 n32 mq_open compat_sys_mq_open
235 n32 mq_unlink sys_mq_unlink
236 n32 mq_timedsend sys_mq_timedsend_time32
237 n32 mq_timedreceive sys_mq_timedreceive_time32
238 n32 mq_notify compat_sys_mq_notify
239 n32 mq_getsetattr compat_sys_mq_getsetattr
240 n32 vserver sys_ni_syscall
241 n32 waitid compat_sys_waitid
# 242 was sys_setaltroot
243 n32 add_key sys_add_key
244 n32 request_key sys_request_key
245 n32 keyctl compat_sys_keyctl
246 n32 set_thread_area sys_set_thread_area
247 n32 inotify_init sys_inotify_init
248 n32 inotify_add_watch sys_inotify_add_watch
249 n32 inotify_rm_watch sys_inotify_rm_watch
250 n32 migrate_pages compat_sys_migrate_pages
251 n32 openat sys_openat
252 n32 mkdirat sys_mkdirat
253 n32 mknodat sys_mknodat
254 n32 fchownat sys_fchownat
255 n32 futimesat sys_futimesat_time32
256 n32 newfstatat sys_newfstatat
257 n32 unlinkat sys_unlinkat
258 n32 renameat sys_renameat
259 n32 linkat sys_linkat
260 n32 symlinkat sys_symlinkat
261 n32 readlinkat sys_readlinkat
262 n32 fchmodat sys_fchmodat
263 n32 faccessat sys_faccessat
264 n32 pselect6 compat_sys_pselect6_time32
265 n32 ppoll compat_sys_ppoll_time32
266 n32 unshare sys_unshare
267 n32 splice sys_splice
268 n32 sync_file_range sys_sync_file_range
269 n32 tee sys_tee
270 n32 vmsplice sys_vmsplice
271 n32 move_pages compat_sys_move_pages
272 n32 set_robust_list compat_sys_set_robust_list
273 n32 get_robust_list compat_sys_get_robust_list
274 n32 kexec_load compat_sys_kexec_load
275 n32 getcpu sys_getcpu
276 n32 epoll_pwait compat_sys_epoll_pwait
277 n32 ioprio_set sys_ioprio_set
278 n32 ioprio_get sys_ioprio_get
279 n32 utimensat sys_utimensat_time32
280 n32 signalfd compat_sys_signalfd
281 n32 timerfd sys_ni_syscall
282 n32 eventfd sys_eventfd
283 n32 fallocate sys_fallocate
284 n32 timerfd_create sys_timerfd_create
285 n32 timerfd_gettime sys_timerfd_gettime32
286 n32 timerfd_settime sys_timerfd_settime32
287 n32 signalfd4 compat_sys_signalfd4
288 n32 eventfd2 sys_eventfd2
289 n32 epoll_create1 sys_epoll_create1
290 n32 dup3 sys_dup3
291 n32 pipe2 sys_pipe2
292 n32 inotify_init1 sys_inotify_init1
293 n32 preadv compat_sys_preadv
294 n32 pwritev compat_sys_pwritev
295 n32 rt_tgsigqueueinfo compat_sys_rt_tgsigqueueinfo
296 n32 perf_event_open sys_perf_event_open
297 n32 accept4 sys_accept4
298 n32 recvmmsg compat_sys_recvmmsg_time32
299 n32 getdents64 sys_getdents64
300 n32 fanotify_init sys_fanotify_init
301 n32 fanotify_mark sys_fanotify_mark
302 n32 prlimit64 sys_prlimit64
303 n32 name_to_handle_at sys_name_to_handle_at
304 n32 open_by_handle_at sys_open_by_handle_at
305 n32 clock_adjtime sys_clock_adjtime32
306 n32 syncfs sys_syncfs
307 n32 sendmmsg compat_sys_sendmmsg
308 n32 setns sys_setns
309 n32 process_vm_readv sys_process_vm_readv
310 n32 process_vm_writev sys_process_vm_writev
311 n32 kcmp sys_kcmp
312 n32 finit_module sys_finit_module
313 n32 sched_setattr sys_sched_setattr
314 n32 sched_getattr sys_sched_getattr
315 n32 renameat2 sys_renameat2
316 n32 seccomp sys_seccomp
317 n32 getrandom sys_getrandom
318 n32 memfd_create sys_memfd_create
319 n32 bpf sys_bpf
320 n32 execveat compat_sys_execveat
321 n32 userfaultfd sys_userfaultfd
322 n32 membarrier sys_membarrier
323 n32 mlock2 sys_mlock2
324 n32 copy_file_range sys_copy_file_range
325 n32 preadv2 compat_sys_preadv2
326 n32 pwritev2 compat_sys_pwritev2
327 n32 pkey_mprotect sys_pkey_mprotect
328 n32 pkey_alloc sys_pkey_alloc
329 n32 pkey_free sys_pkey_free
330 n32 statx sys_statx
331 n32 rseq sys_rseq
332 n32 io_pgetevents compat_sys_io_pgetevents
# 333 through 402 are unassigned to sync up with generic numbers
403 n32 clock_gettime64 sys_clock_gettime
404 n32 clock_settime64 sys_clock_settime
405 n32 clock_adjtime64 sys_clock_adjtime
406 n32 clock_getres_time64 sys_clock_getres
407 n32 clock_nanosleep_time64 sys_clock_nanosleep
408 n32 timer_gettime64 sys_timer_gettime
409 n32 timer_settime64 sys_timer_settime
410 n32 timerfd_gettime64 sys_timerfd_gettime
411 n32 timerfd_settime64 sys_timerfd_settime
412 n32 utimensat_time64 sys_utimensat
413 n32 pselect6_time64 compat_sys_pselect6_time64
414 n32 ppoll_time64 compat_sys_ppoll_time64
416 n32 io_pgetevents_time64 sys_io_pgetevents
417 n32 recvmmsg_time64 compat_sys_recvmmsg_time64
418 n32 mq_timedsend_time64 sys_mq_timedsend
419 n32 mq_timedreceive_time64 sys_mq_timedreceive
420 n32 semtimedop_time64 sys_semtimedop
421 n32 rt_sigtimedwait_time64 compat_sys_rt_sigtimedwait_time64
422 n32 futex_time64 sys_futex
423 n32 sched_rr_get_interval_time64 sys_sched_rr_get_interval
424 n32 pidfd_send_signal sys_pidfd_send_signal
425 n32 io_uring_setup sys_io_uring_setup
426 n32 io_uring_enter sys_io_uring_enter
427 n32 io_uring_register sys_io_uring_register
428 n32 open_tree sys_open_tree
429 n32 move_mount sys_move_mount
430 n32 fsopen sys_fsopen
431 n32 fsconfig sys_fsconfig
432 n32 fsmount sys_fsmount
433 n32 fspick sys_fspick
434 n32 pidfd_open sys_pidfd_open
435 n32 clone3 __sys_clone3
436 n32 close_range sys_close_range
437 n32 openat2 sys_openat2
438 n32 pidfd_getfd sys_pidfd_getfd
439 n32 faccessat2 sys_faccessat2
440 n32 process_madvise sys_process_madvise
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