Hi Mike,
On Sat, 4 Apr 2020 at 23:07, Mike Christie <mchristi@xxxxxxxxxx> wrote:
>
> On 04/02/2020 07:16 AM, Michael Kerrisk (man-pages) wrote:
> > Hello Mike,
> >
> > On 4/2/20 4:08 AM, Mike Christie wrote:
> >> This patch documents the PR_SET_IO_FLUSHER and PR_GET_IO_FLUSHER
> >> prctl commands added to the linux kernel for 5.6 in commit:
> >>
> >> commit 8d19f1c8e1937baf74e1962aae9f90fa3aeab463
> >> Author: Mike Christie <mchristi@xxxxxxxxxx>
> >> Date: Mon Nov 11 18:19:00 2019 -0600>
> >> prctl: PR_{G,S}ET_IO_FLUSHER to support controlling memory reclaim
> >>
> >> Signed-off-by: Mike Christie <mchristi@xxxxxxxxxx>
> >
> > I've applied this patch, but I have some questions:
>
> Hey,
>
> Thanks for fixing up the patch for me.
you're welcome.
> > (a) What happens to the IO_FLUSHER setting in the child of fork(2)?
>
> The child will inherit the setting.
>
> > (b) What happens to the IO_FLUSHER setting during an execve(2)?
> > (Is it preserved, reset, something else?)
>
> It's preserved.
Thanks. I added this text:
The IO_FLUSHER state is inherited by a child process cre‐
ated via fork(2) and is preserved across execve(2).
Cheers,
Michael
--
Michael Kerrisk
Linux man-pages maintainer; http://www.kernel.org/doc/man-pages/
Linux/UNIX System Programming Training: http://man7.org/training/
