On Tue, Feb 25, 2014 at 12:15:28PM -0500, Johannes Weiner wrote: > On Tue, Feb 25, 2014 at 12:28:04AM +0100, Alexander Graf wrote: > > Configuration of tunables and Linux virtual memory settings has > > traditionally > > happened via sysctl. Thanks to that there are well established ways to make > > sysctl configuration bits persistent (sysctl.conf). > > > > KSM introduced a sysfs based configuration path which is not covered by user > > space persistent configuration frameworks. > > > > In order to make life easy for sysadmins, this patch adds all access to all > > KSM tunables via sysctl as well. That way sysctl.conf works for KSM as well, > > giving us a streamlined way to make KSM configuration persistent. > > > > Reported-by: Sasche Peilicke <speili...@suse.com> > > Signed-off-by: Alexander Graf <ag...@suse.de> > > --- > > kernel/sysctl.c | 10 +++++++ > > mm/ksm.c | 78 > > +++++++++++++++++++++++++++++++++++++++++++++++++++++++ > > 2 files changed, 88 insertions(+), 0 deletions(-) > > > > diff --git a/kernel/sysctl.c b/kernel/sysctl.c > > index 332cefc..2169a00 100644 > > --- a/kernel/sysctl.c > > +++ b/kernel/sysctl.c > > @@ -217,6 +217,9 @@ extern struct ctl_table random_table[]; > > #ifdef CONFIG_EPOLL > > extern struct ctl_table epoll_table[]; > > #endif > > +#ifdef CONFIG_KSM > > +extern struct ctl_table ksm_table[]; > > +#endif > > > > #ifdef HAVE_ARCH_PICK_MMAP_LAYOUT > > int sysctl_legacy_va_layout; > > @@ -1279,6 +1282,13 @@ static struct ctl_table vm_table[] = { > > }, > > > > #endif /* CONFIG_COMPACTION */ > > +#ifdef CONFIG_KSM > > + { > > + .procname = "ksm", > > + .mode = 0555, > > + .child = ksm_table, > > + }, > > +#endif > > ksm can be a module, so this won't work. > > Can we make those controls proper module parameters instead?
You can do dynamic sysctl registration and removal. Its its own little filesystem of sorts. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/