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[Bug 1558828] Re: Need enough contiguous memory to support GICv3 ITS table

To: group.of.nepali.translators@xxxxxxxxxxxxxxxxxxx
From: Po-Hsu Lin <po-hsu.lin@xxxxxxxxxxxxx>
Date: Thu, 03 Oct 2019 07:59:21 -0000
Reply-to: Bug 1558828 <1558828@xxxxxxxxxxxxxxxxxx>
Sender: bounces@xxxxxxxxxxxxx

** Changed in: linux (Ubuntu)
       Status: Fix Committed => Fix Released

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https://bugs.launchpad.net/bugs/1558828

Title:
  Need enough contiguous memory to support GICv3 ITS table

Status in linux package in Ubuntu:
  Fix Released
Status in linux source package in Xenial:
  Fix Released
Status in linux source package in Yakkety:
  Won't Fix

Bug description:
  The GICv3 ITS table needs between 36K and 56K of contiguous memory.
  But, with 4K pages and a MAX_ZONEORDER of 11, we can only allocate
  32K. The upstream approach to resolve this will likely be to make the
  core GIC a proper device that can use the DMA API:

     http://www.spinics.net/lists/arm-kernel/msg487748.html

  However - that's a pretty big change, and will take a while to land.
  Until that time, I propose that we bump MAX_ZONEORDER up to 13 for the
  generic kernel.

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