Re: [PATCH] parisc: Remove locking from TLB handler and set page accessed

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To: Mikulas Patocka <mpatocka@xxxxxxxxxx>
Subject: Re: [PATCH] parisc: Remove locking from TLB handler and set page accessed
From: John David Anglin <dave.anglin@xxxxxxxx>
Date: Thu, 20 Sep 2018 19:49:46 -0400
Cc: linux-parisc@xxxxxxxxxxxxxxx, deller@xxxxxx, James.Bottomley@xxxxxxxxxxxxxxxxxxxxx
In-reply-to: <alpine.LRH.2.02.1809201829120.15861@file01.intranet.prod.int.rdu2.redhat.com>
References: <20180916233010.GA5591@mx3210.localdomain> <alpine.LRH.2.02.1809201027110.21787@file01.intranet.prod.int.rdu2.redhat.com> <b0d63395-746d-7a7c-f71b-1b97e810940f@bell.net> <alpine.LRH.2.02.1809201325340.23665@file01.intranet.prod.int.rdu2.redhat.com> <24f3eb6e-8011-36dd-36f6-da04c414c222@bell.net> <alpine.LRH.2.02.1809201518320.13168@file01.intranet.prod.int.rdu2.redhat.com> <6daf305b-1020-8691-95cd-ce801a1f85b8@bell.net> <alpine.LRH.2.02.1809201829120.15861@file01.intranet.prod.int.rdu2.redhat.com>
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On 2018-09-20 6:47 PM, Mikulas Patocka wrote:

Anyway, the current code has "sync" between the idtlbt and unlock, so they
can't be interchanged.

I'm not so sure. The "sync" instruction enforces order on accesses andcache flushes.


Dave

--
John David Anglin  dave.anglin@xxxxxxxx

References:
- [PATCH] parisc: Remove locking from TLB handler and set page accessed
  - From: John David Anglin
- Re: [PATCH] parisc: Remove locking from TLB handler and set page accessed
  - From: Mikulas Patocka
- Re: [PATCH] parisc: Remove locking from TLB handler and set page accessed
  - From: John David Anglin
- Re: [PATCH] parisc: Remove locking from TLB handler and set page accessed
  - From: Mikulas Patocka
- Re: [PATCH] parisc: Remove locking from TLB handler and set page accessed
  - From: John David Anglin
- Re: [PATCH] parisc: Remove locking from TLB handler and set page accessed
  - From: Mikulas Patocka
- Re: [PATCH] parisc: Remove locking from TLB handler and set page accessed
  - From: John David Anglin
- Re: [PATCH] parisc: Remove locking from TLB handler and set page accessed
  - From: Mikulas Patocka

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