From: Nick Piggin <npiggin@kernel.dk>
To: Konstantin Khlebnikov <khlebnikov@openvz.org>
Cc: linux-mm@kvack.org, Andrew Morton <akpm@linux-foundation.org>,
linux-kernel@vger.kernel.org, Ingo Molnar <mingo@redhat.com>,
Linus Torvalds <torvalds@linux-foundation.org>,
Alexander Viro <viro@zeniv.linux.org.uk>,
Nick Piggin <npiggin@kernel.dk>
Subject: Re: [PATCH v2 05/10] mm: kill vma flag VM_CAN_NONLINEAR
Date: Fri, 20 Apr 2012 20:52:55 +1000 [thread overview]
Message-ID: <20120420105255.GC25458@amd.local0.net> (raw)
In-Reply-To: <20120407190115.9726.85024.stgit@zurg>
On Sat, Apr 07, 2012 at 11:01:15PM +0400, Konstantin Khlebnikov wrote:
> This patch moves actual ptes filling for non-linear file mappings
> into special vma operation: ->remap_pages().
>
> Now fs must implement this method to get non-linear mappings support.
> If fs uses filemap_fault() then it can use generic_file_remap_pages() for this.
>
This should enable drivers that prepopulate mappings at mmap() time to
support nonlinear mappings! (I don't know if anyone uses these things
anymore, or ever had except for Oracle, but that's quite besides the
point).
Please update documentation?
Thanks,
Nick
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next prev parent reply other threads:[~2012-04-20 10:53 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-04-07 19:00 [PATCH v2 00/10] mm: vma->vm_flags diet Konstantin Khlebnikov
2012-04-07 19:00 ` [PATCH v2 01/10] x86, pat: remove the dependency on 'vm_pgoff' in track/untrack pfn vma routines Konstantin Khlebnikov
2012-04-07 19:01 ` [PATCH v2 02/10] x86, pat: separate the pfn attribute tracking for remap_pfn_range and vm_insert_pfn Konstantin Khlebnikov
2012-04-07 19:01 ` [PATCH v2 03/10] mm, x86, pat: rework linear pfn-mmap tracking Konstantin Khlebnikov
2012-04-07 19:01 ` [PATCH v2 04/10] mm: introduce vma flag VM_ARCH_1 Konstantin Khlebnikov
2012-04-07 19:01 ` [PATCH v2 05/10] mm: kill vma flag VM_CAN_NONLINEAR Konstantin Khlebnikov
2012-04-20 10:52 ` Nick Piggin [this message]
2012-04-07 19:01 ` [PATCH v2 06/10] mm: kill vma flag VM_INSERTPAGE Konstantin Khlebnikov
2012-04-07 19:01 ` [PATCH v2 07/10] mm: use mm->exe_file instead of first VM_EXECUTABLE vma->vm_file Konstantin Khlebnikov
2012-04-07 19:21 ` Chris Metcalf
2012-04-07 19:01 ` [PATCH v2 08/10] mm: kill vma flag VM_EXECUTABLE Konstantin Khlebnikov
2012-04-07 19:01 ` [PATCH v2 09/10] mm: kill mm->num_exe_file_vmas and keep mm->exe_file until final mmput() Konstantin Khlebnikov
2012-04-07 19:01 ` [PATCH v2 10/10] mm: move madvise vma flags to the end Konstantin Khlebnikov
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