From: "David S. Miller" <davem@redhat.com>
To: trond.myklebust@fys.uio.no
Cc: akpm@zip.com.au, aia21@cantab.net, linux-kernel@vger.kernel.org
Subject: Re: [2.5.20-BUG] 3c59x + highmem + acpi + nfs -> kernel panic
Date: Tue, 04 Jun 2002 03:39:03 -0700 (PDT) [thread overview]
Message-ID: <20020604.033903.42777297.davem@redhat.com> (raw)
In-Reply-To: <200206041339.32899.trond.myklebust@fys.uio.no>
From: Trond Myklebust <trond.myklebust@fys.uio.no>
Date: Tue, 4 Jun 2002 13:39:32 +0200
>From what I can see, the only other place where KM_USER0 is employed would be
in the *_highpage() helper routines in include/linux/highmem.h. These
routines are used in various places, but are usually not protected against
(soft and hard) interrupts or kernel pre-emption. Could it be that the latter
is what is causing trouble?
Any sort of interrupt whatsoever would be enough to cause a problem
here. It is enough of a condition to allow the sunrpc code to
run.
This has nothing specific to do with preemption, although the fact
that KM_USER0 usage does not block preemption is worrysome.
next prev parent reply other threads:[~2002-06-04 11:45 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-06-03 9:20 [2.5.20-BUG] 3c59x + highmem + acpi + nfs -> kernel panic Anton Altaparmakov
2002-06-03 9:48 ` Andrew Morton
2002-06-03 11:32 ` Trond Myklebust
2002-06-04 6:37 ` Andrew Morton
2002-06-04 11:39 ` Trond Myklebust
2002-06-04 10:39 ` David S. Miller [this message]
2002-06-04 12:10 ` Trond Myklebust
2002-06-04 11:46 ` Anton Altaparmakov
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