From: kanoj@kulten.engr.sgi.com (Kanoj Sarcar)
To: Neil Booth <NeilB@earthling.net>, linux-mm@kvack.org
Subject: Re: vmalloc.c question
Date: Fri, 19 Feb 1999 10:11:06 -0800 [thread overview]
Message-ID: <9902191011.ZM28911@kulten.engr.sgi.com> (raw)
In-Reply-To: Neil Booth <NeilB@earthling.net> "vmalloc.c question" (Feb 19, 7:24pm)
On Feb 19, 7:24pm, Neil Booth wrote:
> Subject: vmalloc.c question
> I have a simple question about vmalloc.c. I'm probably missing something
> obvious, but it appears to me that the list "vmlist" of the kernel's
> virtual memory areas is not protected by any kind of locking mechanism,
> and thus subject to races. (e.g. two CPUs trying to insert a new virtual
> memory block in the same place at the same time in get_vm_area).
>
> Or what am I missing?
>
Actually, the ia32 specific ioremap function also calls into the
get_vm_area() function. I was assuming that the giant kernel_lock
protects the "vmlist".
Kanoj
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next prev parent reply other threads:[~1999-02-19 18:17 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
1999-02-19 10:24 vmalloc.c question Neil Booth
1999-02-19 18:11 ` Kanoj Sarcar [this message]
1999-02-19 19:43 ` Benjamin C.R. LaHaise
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