Hi Andi, Thanks for this. Some comments below. On Sat, Jun 19, 2010 at 3:20 PM, Andi Kleen <andi@xxxxxxxxxxxxxx> wrote: > On Sat, Jun 19, 2010 at 02:36:28PM +0200, Michael Kerrisk wrote: >> Hi Andi, >> >> On Tue, Dec 8, 2009 at 11:16 PM, Andi Kleen <andi@xxxxxxxxxxxxxx> wrote: >> > >> > Process based injection is much easier to handle for test programs, >> > who can first bring a page into a specific state and then test. >> > So add a new MADV_SOFT_OFFLINE to soft offline a page, similar >> > to the existing hard offline injector. >> >> I see that this made its way into 2.6.33. Could you write a short >> piece on it for the madvise.2 man page? > > Also fixed the previous snippet slightly. (thanks) > commit edb43354f0ffc04bf4f23f01261f9ea9f43e0d3d > Author: Andi Kleen <ak@xxxxxxxxxxxxxxx> > Date: Sat Jun 19 15:19:28 2010 +0200 > > MADV_SOFT_OFFLINE > > Signed-off-by: Andi Kleen <ak@xxxxxxxxxxxxxxx> > > diff --git a/man2/madvise.2 b/man2/madvise.2 > index db29feb..9dccd97 100644 > --- a/man2/madvise.2 > +++ b/man2/madvise.2 > @@ -154,7 +154,15 @@ processes. > This operation may result in the calling process receiving a > .B SIGBUS > and the page being unmapped. > -This feature is intended for memory testing. > +This feature is intended for testing of memory error handling code. > +This feature is only available if the kernel was configured with > +.BR CONFIG_MEMORY_FAILURE . > +.TP > +.BR MADV_SOFT_OFFLINE " (Since Linux 2.6.33) > +Soft offline a page. This will result in the memory of the page > +being copied to a new page and original page be offlined. The operation Can you explain the term "offlined" please. > +should be transparent to the calling process. Does "should be transparent" mean "is normally invisible"? Thanks, Michael > +This feature is intended for testing of memory error handling code. > This feature is only available if the kernel was configured with > .BR CONFIG_MEMORY_FAILURE . > .TP > > -- Michael Kerrisk Linux man-pages maintainer; http://www.kernel.org/doc/man-pages/ Author of "The Linux Programming Interface" http://blog.man7.org/ -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxxx For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href