| Message ID | 20210430095308.14465-1-o.rempel@pengutronix.de (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | [net-next,v1,1/1] net: selftest: provide option to disable generic selftests | expand |
On 4/30/21 2:53 AM, Oleksij Rempel wrote: > Some systems may need to disable selftests to reduce kernel size or for > some policy reasons. This patch provide option to disable generic selftests. > > Reported-by: Geert Uytterhoeven <geert@linux-m68k.org> > Fixes: 3e1e58d64c3d ("net: add generic selftest support") > Signed-off-by: Oleksij Rempel <o.rempel@pengutronix.de> > --- > net/Kconfig | 5 +++++ > 1 file changed, 5 insertions(+) > > diff --git a/net/Kconfig b/net/Kconfig > index f5ee7c65e6b4..dac98c73fcd8 100644 > --- a/net/Kconfig > +++ b/net/Kconfig > @@ -431,7 +431,12 @@ config SOCK_VALIDATE_XMIT > > config NET_SELFTESTS > def_tristate PHYLIB > + prompt "Support for generic selftests" > depends on PHYLIB && INET > + help > + These selftests are build automatically if any driver with generic built > + selftests support is enabled. This option can be used to disable > + selftests to reduce kernel size. > > config NET_SOCK_MSG > bool > Thanks for the patch/option. But I think it should just default to n, not PHYLIB.
On Fri, Apr 30, 2021 at 08:13:12AM -0700, Randy Dunlap wrote: > On 4/30/21 2:53 AM, Oleksij Rempel wrote: > > Some systems may need to disable selftests to reduce kernel size or for > > some policy reasons. This patch provide option to disable generic selftests. > > > > Reported-by: Geert Uytterhoeven <geert@linux-m68k.org> > > Fixes: 3e1e58d64c3d ("net: add generic selftest support") > > Signed-off-by: Oleksij Rempel <o.rempel@pengutronix.de> > > --- > > net/Kconfig | 5 +++++ > > 1 file changed, 5 insertions(+) > > > > diff --git a/net/Kconfig b/net/Kconfig > > index f5ee7c65e6b4..dac98c73fcd8 100644 > > --- a/net/Kconfig > > +++ b/net/Kconfig > > @@ -431,7 +431,12 @@ config SOCK_VALIDATE_XMIT > > > > config NET_SELFTESTS > > def_tristate PHYLIB > > + prompt "Support for generic selftests" > > depends on PHYLIB && INET > > + help > > + These selftests are build automatically if any driver with generic > > built > > > + selftests support is enabled. This option can be used to disable > > + selftests to reduce kernel size. > > > > config NET_SOCK_MSG > > bool > > > > Thanks for the patch/option. But I think it should just default to n, > not PHYLIB. It should be enabled by default for every device supporting this kind of selftests. This tests extend functionality of cable tests, which are not optional. Disabling it by default makes even less sense, at least for me. It depends on PHYLIB, if PHYLIB is build as module, this this part should be build as module too. And since Geert asking to make it optional, I provided this patch. Regards, Oleksij
> > Thanks for the patch/option. But I think it should just default to n, > > not PHYLIB. > > It should be enabled by default for every device supporting this kind of > selftests. I agree. I still wonder if there is confusion about self test here. Maybe putting ethtool into the description will help people understand it has nothing to do with the kernel self test infrastructure and kernel self testing. Andrew
Hi Oleksij, On Fri, Apr 30, 2021 at 5:42 PM Oleksij Rempel <o.rempel@pengutronix.de> wrote: > On Fri, Apr 30, 2021 at 08:13:12AM -0700, Randy Dunlap wrote: > > On 4/30/21 2:53 AM, Oleksij Rempel wrote: > > > Some systems may need to disable selftests to reduce kernel size or for > > > some policy reasons. This patch provide option to disable generic selftests. > > > > > > Reported-by: Geert Uytterhoeven <geert@linux-m68k.org> > > > Fixes: 3e1e58d64c3d ("net: add generic selftest support") > > > Signed-off-by: Oleksij Rempel <o.rempel@pengutronix.de> > > > --- > > > net/Kconfig | 5 +++++ > > > 1 file changed, 5 insertions(+) > > > > > > diff --git a/net/Kconfig b/net/Kconfig > > > index f5ee7c65e6b4..dac98c73fcd8 100644 > > > --- a/net/Kconfig > > > +++ b/net/Kconfig > > > @@ -431,7 +431,12 @@ config SOCK_VALIDATE_XMIT > > > > > > config NET_SELFTESTS > > > def_tristate PHYLIB > > > + prompt "Support for generic selftests" > > > depends on PHYLIB && INET > > > + help > > > + These selftests are build automatically if any driver with generic > > > > built > > > > > + selftests support is enabled. This option can be used to disable > > > + selftests to reduce kernel size. > > > > > > config NET_SOCK_MSG > > > bool > > > > > > > Thanks for the patch/option. But I think it should just default to n, > > not PHYLIB. > > It should be enabled by default for every device supporting this kind of > selftests. This tests extend functionality of cable tests, which are not > optional. Disabling it by default makes even less sense, at least for > me. Drivers using it ( AG71XX, FEC, NET_DSA) already select it, right? Or better, imply it, which assumes it's optional. > It depends on PHYLIB, if PHYLIB is build as module, this > this part should be build as module too. And since Geert asking to make > it optional, I provided this patch. Gr{oetje,eeting}s, Geert -- Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org In personal conversations with technical people, I call myself a hacker. But when I'm talking to journalists I just say "programmer" or something like that. -- Linus Torvalds
On 4/30/21 9:23 AM, Andrew Lunn wrote: >>> Thanks for the patch/option. But I think it should just default to n, >>> not PHYLIB. >> >> It should be enabled by default for every device supporting this kind of >> selftests. > > I agree. > > I still wonder if there is confusion about self test here. Maybe Probably. > putting ethtool into the description will help people understand it > has nothing to do with the kernel self test infrastructure and kernel > self testing. So it's a hardware check that is required to be run if it's implemented in a driver? Required by who/what? thanks.
On Fri, Apr 30, 2021 at 09:33:42AM -0700, Randy Dunlap wrote: > On 4/30/21 9:23 AM, Andrew Lunn wrote: > >>> Thanks for the patch/option. But I think it should just default to n, > >>> not PHYLIB. > >> > >> It should be enabled by default for every device supporting this kind of > >> selftests. > > > > I agree. > > > > I still wonder if there is confusion about self test here. Maybe > > Probably. > > > putting ethtool into the description will help people understand it > > has nothing to do with the kernel self test infrastructure and kernel > > self testing. > > So it's a hardware check that is required to be run if it's implemented > in a driver? > > Required by who/what? It is not required, but it is a useful debug tool for the educated user. Root can run the self tests on the network interface. If the self test pass, but the interface does not work, you probably have a cabling or configuration issue. Networking is complex and being able to eliminate the interface hardware lets you concentrate on some other part of the problem. You can then maybe next use the cable test option of ethtool to see if the cable has a problem. Andrew
diff --git a/net/Kconfig b/net/Kconfig index f5ee7c65e6b4..dac98c73fcd8 100644 --- a/net/Kconfig +++ b/net/Kconfig @@ -431,7 +431,12 @@ config SOCK_VALIDATE_XMIT config NET_SELFTESTS def_tristate PHYLIB + prompt "Support for generic selftests" depends on PHYLIB && INET + help + These selftests are build automatically if any driver with generic + selftests support is enabled. This option can be used to disable + selftests to reduce kernel size. config NET_SOCK_MSG bool
Some systems may need to disable selftests to reduce kernel size or for some policy reasons. This patch provide option to disable generic selftests. Reported-by: Geert Uytterhoeven <geert@linux-m68k.org> Fixes: 3e1e58d64c3d ("net: add generic selftest support") Signed-off-by: Oleksij Rempel <o.rempel@pengutronix.de> --- net/Kconfig | 5 +++++ 1 file changed, 5 insertions(+)