Re: [PATCH 4.18 050/123] mm/tlb, x86/mm: Support invalidating TLB caches for RCU_TABLE_FREE

From: Andre Tomt
Date: Tue Sep 04 2018 - 04:06:37 EST


On 04. sep. 2018 08:10, Andre Tomt wrote:
On 04. sep. 2018 07:24, Greg Kroah-Hartman wrote:
Full test log link,
https://lkft.validation.linaro.org/scheduler/job/404027#L4051

Does Linus's tree also crash with this patch applied? Being "bug
compatible" is good :)

thanks,

greg k-h


I suspect it is because we're missing upstream commit db7ddef301128dad394f1c0f77027f86ee9a4edb
mm: move tlb_table_flush to tlb_flush_mmu_free

Have not tested.

Tested it now. Adding this commit to my local 4.18.6-rc1 based tree fixes the crashing on my systems.

On 4.18.6-rc1 they would fall over within seconds of getting to the login prompt.