Messages in this thread Patch in this message | | | Date | Sat, 19 Jun 2010 15:20:55 +0200 | From | Andi Kleen <> | Subject | Re: [PATCH] [31/31] HWPOISON: Add a madvise() injector for soft page offlining |
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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@firstfloor.org> 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.
commit edb43354f0ffc04bf4f23f01261f9ea9f43e0d3d Author: Andi Kleen <ak@linux.intel.com> Date: Sat Jun 19 15:19:28 2010 +0200
MADV_SOFT_OFFLINE
Signed-off-by: Andi Kleen <ak@linux.intel.com>
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 +should be transparent to the calling process. +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
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