From: hs@denx.de (Heiko Schocher)
To: linux-arm-kernel@lists.infradead.org
Subject: shared memory problem on ARM v5TE using threads
Date: Fri, 04 Dec 2009 20:35:15 +0100 [thread overview]
Message-ID: <4B196473.2040407@denx.de> (raw)
In-Reply-To: <20091204191349.GG20386@n2100.arm.linux.org.uk>
Hello Russell King,
Russell King - ARM Linux wrote:
> Well, the kernel messages of relevance from the dump are:
>
> shmtest2:351: c7220140 c72179c0 0 41170000 64a1
> shmtest2:351: vma c7217968 addr 40961000 pte 064a13cf
> shmtest2:351: modified 064a13c7
> shmtest2:351: aliases 1
> shmtest2:351: vma c72179c0 addr 41170000 pte 064a13cf
> shmtest2:351: modified 064a13c7
> shmtest2:352: c7220140 c7217548 0 4197f000 64a1
> shmtest2:352: vma c7217968 addr 40961000 pte 064a13c7
> shmtest2:352: vma c72179c0 addr 41170000 pte 064a13c7
> shmtest2:352: aliases 2
> shmtest2:352: vma c7217548 addr 4197f000 pte 064a13cf
> shmtest2:352: modified 064a13c7
> shmtest2:354: c7220140 c7217650 0 4218e000 64a1
> shmtest2:354: vma c7217968 addr 40961000 pte 064a13c7
> shmtest2:354: vma c72179c0 addr 41170000 pte 064a13c7
> shmtest2:354: vma c7217548 addr 4197f000 pte 064a13c7
> shmtest2:354: aliases 3
> shmtest2:354: vma c7217650 addr 4218e000 pte 064a13cf
> shmtest2:354: modified 064a13c7
>
> which shows that the PTEs are having their 'cacheable' bit correctly
> cleared, thus making changes to the page in RAM immediately visible to
> the user program.
Ok, sounds good :-)
> Could it be that the CPU you're using doesn't support the C=0 B=1
> PTE encoding properly, and still caches data in such a region?
Hmm.. I try to find this out, thanks!
bye
Heiko
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DENX Software Engineering GmbH, MD: Wolfgang Denk & Detlev Zundel
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
next prev parent reply other threads:[~2009-12-04 19:35 UTC|newest]
Thread overview: 71+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-12-04 11:23 shared memory problem on ARM v5TE using threads Heiko Schocher
2009-12-04 12:26 ` Joerg Wagner
2009-12-04 13:13 ` Russell King - ARM Linux
2009-12-04 13:42 ` Heiko Schocher
2009-12-04 15:42 ` Russell King - ARM Linux
2009-12-04 15:58 ` Heiko Schocher
2009-12-04 16:38 ` Russell King - ARM Linux
2009-12-04 16:59 ` Russell King - ARM Linux
2009-12-04 17:53 ` Heiko Schocher
2009-12-04 19:13 ` Russell King - ARM Linux
2009-12-04 19:35 ` Heiko Schocher [this message]
2009-12-06 13:53 ` Ronen Shitrit
2009-12-06 14:16 ` Russell King - ARM Linux
2009-12-07 7:54 ` Ronen Shitrit
2009-12-07 8:33 ` Heiko Schocher
2009-12-07 11:31 ` saeed bishara
2009-12-07 11:42 ` Russell King - ARM Linux
2009-12-07 12:16 ` Ronen Shitrit
2009-12-07 12:27 ` Heiko Schocher
2009-12-07 12:42 ` Ronen Shitrit
2009-12-07 15:24 ` Nicolas Pitre
2009-12-07 12:24 ` Heiko Schocher
2009-12-07 12:55 ` Ronen Shitrit
2009-12-07 14:52 ` Russell King - ARM Linux
2009-12-07 15:37 ` Nicolas Pitre
2009-12-07 17:05 ` Russell King - ARM Linux
2009-12-07 17:33 ` Nicolas Pitre
2009-12-07 17:56 ` Russell King - ARM Linux
2009-12-13 11:48 ` Ronen Shitrit
2009-12-13 12:00 ` Russell King - ARM Linux
2009-12-13 12:06 ` Russell King - ARM Linux
2009-12-13 15:42 ` Ronen Shitrit
2009-12-14 13:13 ` christian pellegrin
2009-12-14 14:46 ` Ronen Shitrit
2009-12-14 17:48 ` christian pellegrin
2009-12-14 20:14 ` Nicolas Pitre
2009-12-15 7:50 ` saeed bishara
2009-12-15 11:01 ` christian pellegrin
2009-12-15 15:31 ` christian pellegrin
2009-12-15 17:18 ` Russell King - ARM Linux
2009-12-16 14:08 ` Ronen Shitrit
2009-12-15 17:14 ` Russell King - ARM Linux
2009-12-16 16:35 ` christian pellegrin
2009-12-16 17:38 ` christian pellegrin
2009-12-17 7:35 ` Ronen Shitrit
2009-12-18 20:22 ` Nicolas Pitre
2009-12-18 20:44 ` Russell King - ARM Linux
2009-12-18 21:23 ` Nicolas Pitre
2009-12-18 21:57 ` Russell King - ARM Linux
2009-12-19 11:24 ` christian pellegrin
2009-12-19 11:27 ` [PATCH] Fix coherency problems on ARM v5 with L2 PIPT cache Christian Pellegrin
2009-12-14 19:59 ` shared memory problem on ARM v5TE using threads Nicolas Pitre
2009-12-15 10:33 ` christian pellegrin
2009-12-18 18:45 ` Pavel Machek
2009-12-18 19:00 ` Nicolas Pitre
2009-12-20 19:51 ` Pavel Machek
2009-12-20 22:32 ` Nicolas Pitre
2009-12-21 7:40 ` Pavel Machek
2009-12-18 19:16 ` Russell King - ARM Linux
2009-12-20 19:56 ` Pavel Machek
2009-12-17 11:31 ` Heiko Schocher
2009-12-18 8:08 ` christian pellegrin
2009-12-07 15:40 ` Russell King - ARM Linux
2009-12-07 15:57 ` Nicolas Pitre
2009-12-07 16:06 ` Ronen Shitrit
2009-12-07 17:17 ` Russell King - ARM Linux
2009-12-04 17:25 ` Nicolas Pitre
2009-12-04 17:31 ` Russell King - ARM Linux
2009-12-04 17:47 ` Heiko Schocher
2009-12-04 17:56 ` Nicolas Pitre
2009-12-04 19:33 ` Heiko Schocher
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