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Date: Tue, 06 May 2014 13:43:27 -0700 From: Davidlohr Bueso <davidlohr@...com> To: mtk.manpages@...il.com Cc: Manfred Spraul <manfred@...orfullife.com>, Davidlohr Bueso <davidlohr.bueso@...com>, Martin Schwidefsky <schwidefsky@...ibm.com>, LKML <linux-kernel@...r.kernel.org>, Andrew Morton <akpm@...ux-foundation.org>, KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>, KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>, Greg Thelen <gthelen@...gle.com>, aswin@...com, "linux-mm@...ck.org" <linux-mm@...ck.org> Subject: Re: [PATCH 0/4] ipc/shm.c: increase the limits for SHMMAX, SHMALL On Tue, 2014-05-06 at 13:06 -0700, Davidlohr Bueso wrote: > On Fri, 2014-05-02 at 15:16 +0200, Michael Kerrisk (man-pages) wrote: > > Hi Manfred, > > > > On Mon, Apr 21, 2014 at 4:26 PM, Manfred Spraul > > <manfred@...orfullife.com> wrote: > > > Hi all, > > > > > > the increase of SHMMAX/SHMALL is now a 4 patch series. > > > I don't have ideas how to improve it further. > > > > On the assumption that your patches are heading to mainline, could you > > send me a man-pages patch for the changes? > > Btw, I think that the code could still use some love wrt documentation. > Andrew, please consider this for -next if folks agree. Thanks. > > 8<---------------------------------------------------------- > > From: Davidlohr Bueso <davidlohr@...com> > Subject: [PATCH] ipc,shm: document new limits in the uapi header > > This is useful in the future and allows users to > better understand the reasoning behind the changes. > > Also use UL as we're dealing with it anyways. > > Signed-off-by: Davidlohr Bueso <davidlohr@...com> > --- > include/uapi/linux/shm.h | 14 ++++++++------ > 1 file changed, 8 insertions(+), 6 deletions(-) > > diff --git a/include/uapi/linux/shm.h b/include/uapi/linux/shm.h > index 74e786d..e37fb08 100644 > --- a/include/uapi/linux/shm.h > +++ b/include/uapi/linux/shm.h > @@ -8,17 +8,19 @@ > #endif > > /* > - * SHMMAX, SHMMNI and SHMALL are upper limits are defaults which can > - * be modified by sysctl. > + * SHMMNI, SHMMAX and SHMALL are the default upper limits which can be > + * modified by sysctl. Both SHMMAX and SHMALL have their default values > + * to the maximum limit which is as large as it can be without helping > + * userspace overflow the values. There is really nothing the kernel > + * can do to avoid this any variables. It is therefore not advised to ^^^^^^^^^^ should be 'further', sorry. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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