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* [lkp] [+168 bytes kernel size regression] [i386-tinyconfig] [051cfd2102] waitfd: new syscall implementing waitpid() over fds
@ 2023-09-06 15:23 kernel test robot
  2023-09-07 18:09 ` Josh Triplett
  0 siblings, 1 reply; 2+ messages in thread
From: kernel test robot @ 2023-09-06 15:23 UTC (permalink / raw)
  To: Nick Alcock; +Cc: oe-kbuild-all, lkp, Josh Triplett


FYI, we noticed a +168 bytes kernel size regression due to commit:

commit: 051cfd2102807119e31bdd4947d18388b3df5fd3 (waitfd: new syscall implementing waitpid() over fds)
https://github.com/oracle/dtrace-linux-kernel v2/6.5


Details as below (size data is obtained by `nm --size-sort vmlinux`):

a1ee8f00: kallsyms: add reliable symbol size info
051cfd21: waitfd: new syscall implementing waitpid() over fds

+------------------------+----------+----------+-------+
|         symbol         | a1ee8f00 | 051cfd21 | delta |
+------------------------+----------+----------+-------+
| bzImage                | 516496   | 516592   | 96    |
| nm.D.sys_call_table    | 1808     | 1896     | 88    |
| nm.t.__pollwait        | 154      | 185      | 31    |
| nm.T.__ia32_sys_wait4  | 98       | 114      | 16    |
| nm.t.pollwake          | 88       | 103      | 15    |
| nm.W.__ia32_sys_waitfd | 0        | 6        | 6     |
| nm.t.poll_wait         | 20       | 23       | 3     |
| nm.t.pidfd_poll        | 44       | 47       | 3     |
| nm.t.random_poll       | 54       | 57       | 3     |
| nm.t.perf_poll         | 133      | 136      | 3     |
+------------------------+----------+----------+-------+



Thanks


^ permalink raw reply	[flat|nested] 2+ messages in thread
* Re: [lkp] [+168 bytes kernel size regression] [i386-tinyconfig] [051cfd2102] waitfd: new syscall implementing waitpid() over fds
  2023-09-06 15:23 [lkp] [+168 bytes kernel size regression] [i386-tinyconfig] [051cfd2102] waitfd: new syscall implementing waitpid() over fds kernel test robot
@ 2023-09-07 18:09 ` Josh Triplett
  0 siblings, 0 replies; 2+ messages in thread
From: Josh Triplett @ 2023-09-07 18:09 UTC (permalink / raw)
  To: Nick Alcock; +Cc: kernel test robot, oe-kbuild-all

Hi Nick,

On Wed, Sep 06, 2023 at 11:23:16PM +0800, kernel test robot wrote:
> FYI, we noticed a +168 bytes kernel size regression due to commit:
> 
> commit: 051cfd2102807119e31bdd4947d18388b3df5fd3 (waitfd: new syscall implementing waitpid() over fds)
> https://github.com/oracle/dtrace-linux-kernel v2/6.5

Could you please add a Kconfig option for the new system call, similar
to those for other new system calls?

Thank you.

^ permalink raw reply	[flat|nested] 2+ messages in thread
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2023-09-06 15:23 [lkp] [+168 bytes kernel size regression] [i386-tinyconfig] [051cfd2102] waitfd: new syscall implementing waitpid() over fds kernel test robot
2023-09-07 18:09 ` Josh Triplett

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