From: Dave Hansen <dave.hansen@intel.com>
To: "Liam R. Howlett" <Liam.Howlett@oracle.com>,
linux-mm@kvack.org, Andrew Morton <akpm@linux-foundation.org>
Cc: Suren Baghdasaryan <surenb@google.com>,
Vlastimil Babka <vbabka@suse.cz>,
Lorenzo Stoakes <lstoakes@gmail.com>,
Matthew Wilcox <willy@infradead.org>,
sidhartha.kumar@oracle.com,
"Paul E . McKenney" <paulmck@kernel.org>,
Bert Karwatzki <spasswolf@web.de>, Jiri Olsa <olsajiri@gmail.com>,
linux-kernel@vger.kernel.org, Kees Cook <kees@kernel.org>,
LEROY Christophe <christophe.leroy2@cs-soprasteria.com>,
linuxppc-dev@lists.ozlabs.org, Dmitry Safonov <dima@arista.com>,
Michael Ellerman <mpe@ellerman.id.au>
Subject: Re: [PATCH v4 17/21] mm/mmap: Drop arch_unmap() call from all archs
Date: Wed, 10 Jul 2024 12:27:21 -0700 [thread overview]
Message-ID: <c9e94bb8-e45d-4fb7-9811-b6c7e78c537f@intel.com> (raw)
In-Reply-To: <20240710192250.4114783-18-Liam.Howlett@oracle.com>
On 7/10/24 12:22, Liam R. Howlett wrote:
> The arch_unmap call was previously moved above the rbtree modifications
> in commit 5a28fc94c914 ("x86/mpx, mm/core: Fix recursive munmap()
> corruption"). The move was motivated by an issue with calling
> arch_unmap() after the rbtree was modified.
>
> Since the above commit, mpx was dropped from the kernel in 45fc24e89b7c
> ("x86/mpx: remove MPX from arch/x86"), so the motivation for calling
> arch_unmap() prior to modifying the vma tree no longer exists
> (regardless of rbtree or maple tree implementations).
>
> Furthermore, the powerpc implementation is also no longer needed as per
> [1] and [2]. So the arch_unmap() function can be completely removed.
Thanks for doing this cleanup, Liam!
Acked-by: Dave Hansen <dave.hansen@intel.com>
next prev parent reply other threads:[~2024-07-10 19:27 UTC|newest]
Thread overview: 38+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-07-10 19:22 [PATCH v4 00/21] Avoid MAP_FIXED gap exposure Liam R. Howlett
2024-07-10 19:22 ` [PATCH v4 01/21] mm/mmap: Correctly position vma_iterator in __split_vma() Liam R. Howlett
2024-07-10 19:22 ` [PATCH v4 02/21] mm/mmap: Introduce abort_munmap_vmas() Liam R. Howlett
2024-07-10 19:22 ` [PATCH v4 03/21] mm/mmap: Introduce vmi_complete_munmap_vmas() Liam R. Howlett
2024-07-10 19:22 ` [PATCH v4 04/21] mm/mmap: Extract the gathering of vmas from do_vmi_align_munmap() Liam R. Howlett
2024-07-10 19:22 ` [PATCH v4 05/21] mm/mmap: Introduce vma_munmap_struct for use in munmap operations Liam R. Howlett
2024-07-10 19:22 ` [PATCH v4 06/21] mm/mmap: Change munmap to use vma_munmap_struct() for accounting and surrounding vmas Liam R. Howlett
2024-07-10 19:22 ` [PATCH v4 07/21] mm/mmap: Extract validate_mm() from vma_complete() Liam R. Howlett
2024-07-10 19:22 ` [PATCH v4 08/21] mm/mmap: Inline munmap operation in mmap_region() Liam R. Howlett
2024-07-10 19:22 ` [PATCH v4 09/21] mm/mmap: Expand mmap_region() munmap call Liam R. Howlett
2024-07-11 14:16 ` Lorenzo Stoakes
2024-07-10 19:22 ` [PATCH v4 10/21] mm/mmap: Support vma == NULL in init_vma_munmap() Liam R. Howlett
2024-07-11 14:28 ` Lorenzo Stoakes
2024-07-11 16:04 ` Liam R. Howlett
2024-07-10 19:22 ` [PATCH v4 11/21] mm/mmap: Reposition vma iterator in mmap_region() Liam R. Howlett
2024-07-10 19:22 ` [PATCH v4 12/21] mm/mmap: Track start and end of munmap in vma_munmap_struct Liam R. Howlett
2024-07-10 19:22 ` [PATCH v4 13/21] mm/mmap: Clean up unmap_region() argument list Liam R. Howlett
2024-07-10 19:22 ` [PATCH v4 14/21] mm/mmap: Avoid zeroing vma tree in mmap_region() Liam R. Howlett
2024-07-11 15:25 ` Lorenzo Stoakes
2024-07-11 16:07 ` Liam R. Howlett
2024-07-16 12:46 ` kernel test robot
2024-07-17 17:42 ` Liam R. Howlett
2024-07-10 19:22 ` [PATCH v4 15/21] mm/mmap: Use PHYS_PFN " Liam R. Howlett
2024-07-10 19:22 ` [PATCH v4 16/21] mm/mmap: Use vms accounted pages " Liam R. Howlett
2024-07-10 19:22 ` [PATCH v4 17/21] mm/mmap: Drop arch_unmap() call from all archs Liam R. Howlett
2024-07-10 19:27 ` Dave Hansen [this message]
2024-07-10 21:02 ` LEROY Christophe
2024-07-10 23:26 ` Liam R. Howlett
2024-07-11 8:28 ` LEROY Christophe
2024-07-11 15:59 ` Liam R. Howlett
2024-07-10 19:22 ` [PATCH v4 18/21] mm/mmap: Move can_modify_mm() check down the stack Liam R. Howlett
2024-07-17 5:03 ` Jeff Xu
2024-07-17 14:07 ` Liam R. Howlett
2024-07-10 19:22 ` [PATCH v4 19/21] ipc/shm, mm: Drop do_vma_munmap() Liam R. Howlett
2024-07-10 19:22 ` [PATCH v4 20/21] mm/mmap: Move may_expand_vm() check in mmap_region() Liam R. Howlett
2024-07-11 15:38 ` Lorenzo Stoakes
2024-07-10 19:22 ` [PATCH v4 21/21] mm/mmap: Drop incorrect comment from vms_gather_munmap_vmas() Liam R. Howlett
2024-07-11 15:39 ` Lorenzo Stoakes
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