From: Nick Piggin <npiggin@suse.de>
To: Nick Piggin <npiggin@suse.de>
Cc: Andrew Morton <akpm@osdl.org>,
linux-kernel@vger.kernel.org, linux-mm@kvack.org
Subject: Re: [patch 1/5] mm: remap_vmalloc_range
Date: Fri, 21 Apr 2006 09:43:45 +0200 [thread overview]
Message-ID: <20060421074345.GN21660@wotan.suse.de> (raw)
In-Reply-To: <20060421074156.GM21660@wotan.suse.de>
On Fri, Apr 21, 2006 at 09:41:57AM +0200, Nick Piggin wrote:
> On Fri, Apr 21, 2006 at 12:29:38AM -0700, Andrew Morton wrote:
> >
> > When replacing calls to remap_pfn_rage() with calls to remap_valloc_range():
> >
> > - remap_pfn_range() sets VM_IO|VM_RESERVED|VM_PFNMAP on the user's vma.
> > remap_valloc_range() sets only VM_RESERVED.
>
> Yep, it doesn't use PFNMAPs (we can always user the underlying struct
> page), nor is it IO space. The only change that should be seen, as
> noted in patch 4/5, is that get_user_pages will work on all mappings
> now. I don't think there is a downside to this?
By "change that should be seen", I mean the only change that
userspace should see.
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next prev parent reply other threads:[~2006-04-21 7:43 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-04-21 6:43 [patch 0/5] mm: improve remapping of vmalloc regions Nick Piggin
2006-04-21 6:43 ` [patch 1/5] mm: remap_vmalloc_range Nick Piggin
2006-04-21 7:17 ` Andrew Morton
2006-04-21 7:33 ` Nick Piggin
2006-04-21 7:59 ` Andrew Morton
2006-04-21 8:06 ` Nick Piggin
2006-04-21 7:29 ` Andrew Morton
2006-04-21 7:41 ` Nick Piggin
2006-04-21 7:43 ` Nick Piggin [this message]
2006-04-21 8:02 ` Andrew Morton
2006-04-21 6:43 ` [patch 2/5] mm: remove vmalloc_to_pfn Nick Piggin
2006-04-21 6:55 ` Nick Piggin
2006-04-21 6:43 ` [patch 3/5] mm: remove rvmalloc Nick Piggin
2006-04-21 6:43 ` [patch 4/5] mm: extra remap_vmalloc_range check Nick Piggin
2006-04-21 6:44 ` [patch 5/5] drivers: leave vm_flags alone Nick Piggin
-- strict thread matches above, loose matches on Subject: below --
2006-04-20 17:06 [patch 0/5] mm: improve remapping of vmalloc regions Nick Piggin
2006-04-20 17:06 ` [patch 1/5] mm: remap_vmalloc_range Nick Piggin
2006-04-20 17:22 ` Christoph Hellwig
2006-04-20 17:33 ` Nick Piggin
2006-04-20 18:09 ` Nick Piggin
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