From: gilles.chanteperdrix@xenomai.org (Gilles Chanteperdrix)
To: linux-arm-kernel@lists.infradead.org
Subject: [RFC 11/11] ARM: avoid flushing I-cache in flush_cache_mm()
Date: Fri, 13 Nov 2009 16:01:30 +0100 [thread overview]
Message-ID: <4AFD74CA.3040507@xenomai.org> (raw)
In-Reply-To: <f4e898a97589fdee3c689780212fe225e6732a6b.1256683230.git.rmk+kernel@arm.linux.org.uk>
Russell King wrote:
> flush_cache_mm() is called in two cases:
> 1. when a process exits, just before the page tables are torn down.
> We can allow the stale lines to evict themselves over time without
> causing any harm.
Is not there any risk to see cache lines evicted at a time when there
are no longer any page table entries for them? This was said to be a
problem during the early discussions on FCSE:
http://lists.arm.linux.org.uk/lurker/message/20071005.131816.8b478a49.en.html
--
Gilles
next prev parent reply other threads:[~2009-11-13 15:01 UTC|newest]
Thread overview: 42+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-10-27 22:40 [RFC 00/11] Cache handling updates Russell King
2009-10-24 13:11 ` [RFC 01/11] ARM: Reduce __flush_dcache_page() visibility Russell King
2009-10-24 21:36 ` [RFC 02/11] ARM: Fix errata 411920 workarounds Russell King
2009-10-28 15:31 ` Catalin Marinas
2009-10-28 17:32 ` Russell King - ARM Linux
2009-10-29 18:32 ` Catalin Marinas
2009-10-29 19:11 ` Russell King - ARM Linux
2009-10-30 17:59 ` Catalin Marinas
2009-10-24 21:58 ` [RFC 03/11] ARM: move __flush_icache_all() out of flush_pfn_alias() Russell King
2009-10-24 22:05 ` [RFC 04/11] ARM: Remove __flush_icache_all() from __flush_dcache_page() Russell King
2009-10-25 10:23 ` [RFC 05/11] ARM: Avoid flush_dcache_page() for zero page Russell King
2009-10-25 10:40 ` [RFC 06/11] ARM: Avoid duplicated implementation for VIVT cache flushing Russell King
2009-10-25 10:59 ` [RFC 07/11] ARM: Allocate ZERO_PAGE from highmem Russell King
2009-12-04 14:57 ` Russell King - ARM Linux
2009-10-25 11:25 ` [RFC 08/11] ARM: Avoid evaluating page_address() multiple times Russell King
2009-10-25 13:35 ` [RFC 09/11] ARM: Add I-cache invalidation for VIVT ASID tagged caches Russell King
2009-10-28 15:49 ` Catalin Marinas
2009-10-28 17:35 ` Russell King - ARM Linux
2009-10-29 17:23 ` Catalin Marinas
2009-10-25 14:12 ` [RFC 10/11] ARM: arrange for flush_cache_range() to always flush the I-cache Russell King
2009-10-28 15:51 ` Catalin Marinas
2009-10-28 17:37 ` Russell King - ARM Linux
2009-10-29 17:51 ` Catalin Marinas
2009-11-16 10:46 ` Catalin Marinas
2009-11-16 10:58 ` Russell King - ARM Linux
2009-11-22 20:28 ` Nicolas Pitre
2009-11-23 20:28 ` Russell King - ARM Linux
2009-11-24 13:05 ` [RFC 10/11] ARM: arrange for flush_cache_range() to alwaysflush " Catalin Marinas
2009-11-24 14:46 ` Russell King - ARM Linux
2009-11-24 16:52 ` [RFC 10/11] ARM: arrange for flush_cache_range() toalwaysflush " Catalin Marinas
2009-11-24 16:56 ` Russell King - ARM Linux
2009-11-16 11:06 ` [RFC 10/11] ARM: arrange for flush_cache_range() to always flush " Dirk Behme
2009-10-25 14:31 ` [RFC 11/11] ARM: avoid flushing I-cache in flush_cache_mm() Russell King
2009-11-13 15:01 ` Gilles Chanteperdrix [this message]
2009-11-13 15:12 ` Russell King
2009-11-13 15:15 ` Gilles Chanteperdrix
2009-10-28 15:53 ` [RFC 00/11] Cache handling updates Catalin Marinas
2009-10-28 16:17 ` Laurent Pinchart
2009-10-28 16:28 ` Catalin Marinas
2009-11-05 19:19 ` Pavel Machek
2009-10-28 17:41 ` Russell King - ARM Linux
2009-10-28 19:25 ` Laurent Pinchart
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