Re: [PATCH 0/4] arch, mm: improve robustness of direct map manipulation
From: "Edgecombe, Rick P" <rick.p.edgecombe@intel.com>
Date: 2020-10-29 23:19:50
Also in:
linux-mm, linux-pm, linux-riscv, linux-s390, linuxppc-dev, lkml, sparclinux
On Thu, 2020-10-29 at 10:12 +0200, Mike Rapoport wrote:
This series goal was primarily to separate dependincies and make it clearer what DEBUG_PAGEALLOC and what SET_DIRECT_MAP are. As it turned out, there is also some lack of consistency between architectures that implement either of this so I tried to improve this as well. Honestly, I don't know if a thread can be paused at the time __vunmap() left invalid pages, but it could, there is an issue on arm64 with DEBUG_PAGEALLOC=n and this set fixes it.
Ah, ok. So from this and the other thread, this is about the logic in arm's cpa for when it will try the un/map operations. I think the logic actually works currently. And this series introduces a problem on ARM similar to the one you are saying preexists. I put the details in the other thread. _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel