From: "Benjamin C.R. LaHaise" <blah@kvack.org>
To: masp0008@stud.uni-sb.de
Cc: linux-mm@kvack.org
Subject: Re: active_mm & SMP & TLB flush: possible bug
Date: Wed, 28 Jul 1999 11:46:43 -0400 (EDT) [thread overview]
Message-ID: <Pine.LNX.3.96.990728114443.27907A-100000@mole.spellcast.com> (raw)
In-Reply-To: <379EF7D0.375C78A4@colorfullife.com>
On Wed, 28 Jul 1999, Manfred Spraul wrote:
> if these 2 CPU switch their roles, then we use an outdates
> TLB cache.
You're right, thankfully it's fixed in 2.3.12-8 (meaning that my dual
finally stops SIGSEGVing random processes).
> BTW, where can I find more details about the active_mm implementation?
> specifically, I'd like to know why active_mm was added to
> "struct task_struct".
> >From my first impression, it's a CPU specific information
> (every CPU has exactly one active_mm, threads which are not running have
> no
> active_mm), so I'd have used a global array[NR_CPUS].
That soulds like a good idea -- care to offer a patch? =)
-ben
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next prev parent reply other threads:[~1999-07-28 15:46 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
1999-07-28 12:30 active_mm & SMP & TLB flush: possible bug Manfred Spraul
1999-07-28 15:46 ` Benjamin C.R. LaHaise [this message]
1999-07-28 18:07 ` Kanoj Sarcar
-- strict thread matches above, loose matches on Subject: below --
1999-07-28 16:58 Manfred Spraul
1999-07-28 18:35 Manfred Spraul, Benjamin C.R. LaHaise
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