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From: Christoph Hellwig <hch@lst.de>
To: Andrew Morton <akpm@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>,
	Boris Ostrovsky <boris.ostrovsky@oracle.com>,
	Juergen Gross <jgross@suse.com>,
	Stefano Stabellini <sstabellini@kernel.org>,
	Jani Nikula <jani.nikula@linux.intel.com>,
	Joonas Lahtinen <joonas.lahtinen@linux.intel.com>,
	Tvrtko Ursulin <tvrtko.ursulin@linux.intel.com>,
	Chris Wilson <chris@chris-wilson.co.uk>,
	Matthew Auld <matthew.auld@intel.com>,
	Rodrigo Vivi <rodrigo.vivi@intel.com>,
	Minchan Kim <minchan@kernel.org>,
	Matthew Wilcox <willy@infradead.org>,
	Nitin Gupta <ngupta@vflare.org>,
	x86@kernel.org, xen-devel@lists.xenproject.org,
	linux-kernel@vger.kernel.org, intel-gfx@lists.freedesktop.org,
	dri-devel@lists.freedesktop.org, linux-mm@kvack.org
Subject: remove alloc_vm_area v3
Date: Wed, 30 Sep 2020 19:51:23 +0200
Message-ID: <20200930175133.1252382-1-hch@lst.de> (raw)

Hi Andrew,

this series removes alloc_vm_area, which was left over from the big
vmalloc interface rework.  It is a rather arkane interface, basicaly
the equivalent of get_vm_area + actually faulting in all PTEs in
the allocated area.  It was originally addeds for Xen (which isn't
modular to start with), and then grew users in zsmalloc and i915
which seems to mostly qualify as abuses of the interface, especially
for i915 as a random driver should not set up PTE bits directly.

A git tree is also available here:

    git://git.infradead.org/users/hch/misc.git alloc_vm_area

Gitweb:

    http://git.infradead.org/users/hch/misc.git/shortlog/refs/heads/alloc_vm_area

Changes since v2:
 - add another missing i initialization
 - rebased to mainline instead of drm-tip again

Changes since v1:
 - fix a bug in the zsmalloc changes
 - fix a bug and rebase to include the recent changes in i915
 - add a new vmap flag that allows to free the page array and pages
   using vfree
 - add a vfree documentation updated from Matthew

Diffstat:
 arch/x86/xen/grant-table.c                |   27 ++++--
 drivers/gpu/drm/i915/Kconfig              |    1 
 drivers/gpu/drm/i915/gem/i915_gem_pages.c |  131 +++++++++++++-----------------
 drivers/gpu/drm/i915/gt/shmem_utils.c     |   76 ++++-------------
 drivers/xen/xenbus/xenbus_client.c        |   30 +++---
 include/linux/vmalloc.h                   |    7 -
 mm/Kconfig                                |    3 
 mm/memory.c                               |   16 ++-
 mm/nommu.c                                |    7 -
 mm/vmalloc.c                              |  123 ++++++++++++++--------------
 mm/zsmalloc.c                             |   10 +-
 11 files changed, 200 insertions(+), 231 deletions(-)

             reply index

Thread overview: 11+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-09-30 17:51 Christoph Hellwig [this message]
2020-09-30 17:51 ` [PATCH 01/10] mm: update the documentation for vfree Christoph Hellwig
2020-09-30 17:51 ` [PATCH 02/10] mm: add a VM_MAP_PUT_PAGES flag for vmap Christoph Hellwig
2020-09-30 17:51 ` [PATCH 03/10] mm: add a vmap_pfn function Christoph Hellwig
2020-09-30 17:51 ` [PATCH 04/10] mm: allow a NULL fn callback in apply_to_page_range Christoph Hellwig
2020-09-30 17:51 ` [PATCH 05/10] zsmalloc: switch from alloc_vm_area to get_vm_area Christoph Hellwig
2020-09-30 17:51 ` [PATCH 06/10] drm/i915: use vmap in shmem_pin_map Christoph Hellwig
2020-09-30 17:51 ` [PATCH 07/10] drm/i915: use vmap in i915_gem_object_map Christoph Hellwig
2020-09-30 17:51 ` [PATCH 08/10] xen/xenbus: use apply_to_page_range directly in xenbus_map_ring_pv Christoph Hellwig
2020-09-30 17:51 ` [PATCH 09/10] x86/xen: open code alloc_vm_area in arch_gnttab_valloc Christoph Hellwig
2020-09-30 17:51 ` [PATCH 10/10] mm: remove alloc_vm_area Christoph Hellwig

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