From: Evgeniy Polyakov <johnpol@2ka.mipt.ru>
To: Herbert Xu <herbert@gondor.apana.org.au>
Cc: akpm@osdl.org, guillaume.thouvenin@bull.net, greg@kroah.com,
linux-kernel@vger.kernel.org,
"David S. Miller" <davem@davemloft.net>
Subject: Re: [Fwd: Re: connector is missing in 2.6.12-rc2-mm1]
Date: Fri, 08 Apr 2005 09:19:39 +0400 [thread overview]
Message-ID: <1112937579.28858.218.camel@uganda> (raw)
In-Reply-To: <20050408050814.GA32722@gondor.apana.org.au>
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On Fri, 2005-04-08 at 15:08 +1000, Herbert Xu wrote:
> On Fri, Apr 08, 2005 at 09:11:56AM +0400, Evgeniy Polyakov wrote:
> >
> > > Yes but what will go wrong on uni-processor MIPS when you don't do the
> > > sync in atomic_sub_return?
> >
> > Sync synchornizes cached mamory access,
> > without it new value may be stored only into cache,
> > but not into memory.
>
> I know, the same thing holds for most architectures, including i386.
> However, this is not an issue for uni-processor kernels anywhere else,
> so what's so special about MIPS?
Does i386 or ppc has cached and uncached memory?
No, i386, ppc and others do not require sync on uncached memory access,
and only instruction not data cache sync on SMP.
> Cheers,
--
Evgeniy Polyakov
Crash is better than data corruption -- Arthur Grabowski
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next prev parent reply other threads:[~2005-04-08 5:13 UTC|newest]
Thread overview: 50+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <1112859412.18360.31.camel@frecb000711.frec.bull.fr>
2005-04-07 7:53 ` [Fwd: Re: connector is missing in 2.6.12-rc2-mm1] Evgeniy Polyakov
2005-04-07 7:58 ` Andrew Morton
2005-04-07 8:23 ` Evgeniy Polyakov
2005-04-07 8:32 ` Andrew Morton
2005-04-07 10:12 ` Evgeniy Polyakov
2005-04-08 2:59 ` Herbert Xu
2005-04-08 3:33 ` Evgeniy Polyakov
2005-04-08 3:32 ` Herbert Xu
2005-04-08 3:52 ` Evgeniy Polyakov
2005-04-08 3:50 ` Herbert Xu
2005-04-08 4:02 ` Evgeniy Polyakov
2005-04-08 4:02 ` Herbert Xu
2005-04-08 4:21 ` Evgeniy Polyakov
2005-04-08 4:17 ` Herbert Xu
2005-04-08 4:23 ` David S. Miller
2005-04-08 4:55 ` Evgeniy Polyakov
2005-04-08 4:53 ` Herbert Xu
2005-04-08 4:55 ` David S. Miller
2005-04-08 5:11 ` Evgeniy Polyakov
2005-04-08 5:08 ` Herbert Xu
2005-04-08 5:19 ` Evgeniy Polyakov [this message]
2005-04-08 6:02 ` David S. Miller
2005-04-08 13:11 ` Daniel Jacobowitz
2005-04-08 6:12 ` Evgeniy Polyakov
2005-04-08 4:22 ` David S. Miller
2005-04-07 8:13 ` Evgeniy Polyakov
2005-04-07 9:12 ` Ian Campbell
2005-04-07 9:52 ` Evgeniy Polyakov
2005-04-07 10:41 ` Kay Sievers
2005-04-07 11:24 ` Evgeniy Polyakov
2005-04-07 14:23 ` Kay Sievers
2005-04-07 14:49 ` Evgeniy Polyakov
2005-04-07 15:47 ` James Morris
2005-04-08 3:41 ` Evgeniy Polyakov
2005-04-08 5:55 ` James Morris
2005-04-08 6:48 ` Evgeniy Polyakov
2005-04-10 9:52 ` Herbert Xu
2005-04-10 10:32 ` Evgeniy Polyakov
2005-04-10 11:08 ` Kay Sievers
2005-04-10 11:37 ` Evgeniy Polyakov
2005-04-10 11:54 ` Evgeniy Polyakov
2005-04-10 12:10 ` Thomas Graf
2005-04-10 12:15 ` Evgeniy Polyakov
2005-04-10 14:39 ` jamal
2005-04-10 14:56 ` James Morris
2005-04-10 15:08 ` jamal
2005-04-10 19:27 ` Thomas Graf
2005-04-11 5:22 ` Evgeniy Polyakov
2005-04-11 10:45 ` Thomas Graf
2005-04-11 11:19 ` Evgeniy Polyakov
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