On Tue, Sep 15, 2020 at 08:16:42PM +0200, peterz@infradead.org wrote:
On Tue, Sep 15, 2020 at 08:06:59PM +0200, Michal Suchanek wrote:
This reverts commit 116ac378bb3ff844df333e7609e7604651a0db9d.
This commit causes the kernel to oops and reboot when injecting a SLB multihit which causes a MCE.
Before this commit a SLB multihit was corrected by the kernel and the system continued to operate normally.
cc: stable@vger.kernel.org Fixes: 116ac378bb3f ("powerpc/64s: machine check interrupt update NMI accounting") Signed-off-by: Michal Suchanek msuchanek@suse.de
Ever since 69ea03b56ed2 ("hardirq/nmi: Allow nested nmi_enter()") nmi_enter() supports nesting natively.
And this patch was merged in parallel with this native nesting support and conflicted with it - hence the explicit nesting in the hunk that did not conflict.
Either way the bug is present on kernels both with and without 69ea03b56ed2. So besides the conflict 69ea03b56ed2 does not affect this problem.
Thanks
Michal