Messages in this thread | | | From | "Manali Shukla (manashuk)" <> | Subject | Re: [ PATCH stable v4.19] EDAC: Drop per-memory controller buses | Date | Sun, 5 Apr 2020 18:01:21 +0000 |
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Hi Greg
With this patch , we are removing per-MC bus, this removes dependency on value of max number of controllers (EDAC_MAX_MCS) which is hardcoded to 2 * MAX_NUMNODES in all stable versions of kernel.
On two nodes system MAX_NUMNODES value is ‘1’ , so value of max number of memory controller becomes ‘2’, this patch fixes this issue when there are only 2 nodes on the system and number of memory controllers are more than ‘2'
https://lore.kernel.org/linux-edac/20180926152752.GG5584@zn.tnic/
-Manali
On 17/03/20, 3:52 PM, "Greg KH" <gregkh@linuxfoundation.org> wrote:
On Wed, Mar 11, 2020 at 10:22:01PM -0700, Manali K Shukla wrote: > From: Borislav Petkov <bp@suse.de> > > upstream 861e6ed667c83d64a42b0db41a22d6b4de4e913f commit > > ... and use the single edac_subsys object returned from > subsys_system_register(). The idea is to have a single bus > and multiple devices on it. > > Signed-off-by: Borislav Petkov <bp@suse.de> > Acked-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org> > CC: Aristeu Rozanski Filho <arozansk@redhat.com> > CC: Greg KH <gregkh@linuxfoundation.org> > CC: Justin Ernst <justin.ernst@hpe.com> > CC: linux-edac <linux-edac@vger.kernel.org> > CC: Mauro Carvalho Chehab <mchehab@kernel.org> > CC: Russ Anderson <rja@hpe.com> > Cc: Tony Luck <tony.luck@intel.com> > Link: https://lkml.kernel.org/r/20180926152752.GG5584@zn.tnic > [Manali: backport to v4.19 -stable : > - removing per-MC bus, this enables to get rid of memory controllers > maximum number notion > - value of max number of memory controllers is 2 * MAX_NUMNODES. On two nodes system MAX_NUMNODES value is ‘1’ and > so value of max number of memory controller becomes ‘2’, this patch fixes this issue when there are only 2 nodes on the system > and number of memory controllers are more than ‘2’] > (cherry picked from commit 861e6ed667c83d64a42b0db41a22d6b4de4e913f) > Signed-off-by: Manali K Shukla <manashuk@cisco.com> Why is this a patch for the stable trees? What problem does it solve? thanks, greg k-h-
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