From: Christoph Hellwig <hch@lst.de>
To: Matthew Wilcox <willy@infradead.org>
Cc: Christoph Hellwig <hch@lst.de>,
Andrew Morton <akpm@linux-foundation.org>,
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>,
Rodrigo Vivi <rodrigo.vivi@intel.com>,
Minchan Kim <minchan@kernel.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: Re: [PATCH 3/6] drm/i915: use vmap in shmem_pin_map
Date: Tue, 22 Sep 2020 08:22:49 +0200 [thread overview]
Message-ID: <20200922062249.GA30831@lst.de> (raw)
In-Reply-To: <20200921191157.GX32101@casper.infradead.org>
On Mon, Sep 21, 2020 at 08:11:57PM +0100, Matthew Wilcox wrote:
> This is awkward. I'd like it if we had a vfree() variant which called
> put_page() instead of __free_pages(). I'd like it even more if we
> used release_pages() instead of our own loop that called put_page().
Note that we don't need a new vfree variant, we can do this manually if
we want, take a look at kernel/dma/remap.c. But I thought this code
intentionally doesn't want to do that to avoid locking in the memory
for the pages array. Maybe the i915 maintainers can clarify.
next prev parent reply other threads:[~2020-09-22 6:22 UTC|newest]
Thread overview: 33+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-09-18 16:37 remove alloc_vm_area Christoph Hellwig
2020-09-18 16:37 ` [PATCH 1/6] zsmalloc: switch from alloc_vm_area to get_vm_area Christoph Hellwig
2020-09-21 17:42 ` Minchan Kim
2020-09-21 18:17 ` Christoph Hellwig
2020-09-21 18:42 ` Minchan Kim
2020-09-21 18:43 ` Christoph Hellwig
2020-09-18 16:37 ` [PATCH 2/6] mm: add a vmap_pfn function Christoph Hellwig
2020-09-18 16:37 ` [PATCH 3/6] drm/i915: use vmap in shmem_pin_map Christoph Hellwig
2020-09-21 19:11 ` Matthew Wilcox
2020-09-22 6:22 ` Christoph Hellwig [this message]
2020-09-22 8:23 ` [Intel-gfx] " Tvrtko Ursulin
2020-09-22 14:31 ` Christoph Hellwig
2020-09-22 16:13 ` Tvrtko Ursulin
2020-09-22 16:33 ` Christoph Hellwig
2020-09-22 17:04 ` Tvrtko Ursulin
2020-09-23 6:11 ` Christoph Hellwig
2020-09-22 11:21 ` Matthew Wilcox
2020-09-22 14:39 ` Christoph Hellwig
2020-09-22 14:53 ` Matthew Wilcox
2020-09-18 16:37 ` [PATCH 4/6] drm/i915: use vmap in i915_gem_object_map Christoph Hellwig
2020-09-23 9:52 ` [Intel-gfx] " Tvrtko Ursulin
2020-09-23 13:41 ` Christoph Hellwig
2020-09-23 13:58 ` Tvrtko Ursulin
2020-09-23 14:44 ` Christoph Hellwig
2020-09-24 12:22 ` Tvrtko Ursulin
2020-09-24 13:23 ` Christoph Hellwig
2020-09-18 16:37 ` [PATCH 5/6] xen/xenbus: use apply_to_page_range directly in xenbus_map_ring_pv Christoph Hellwig
2020-09-18 16:37 ` [PATCH 6/6] x86/xen: open code alloc_vm_area in arch_gnttab_valloc Christoph Hellwig
2020-09-21 20:44 ` boris.ostrovsky
2020-09-22 14:58 ` Christoph Hellwig
2020-09-22 15:24 ` boris.ostrovsky
2020-09-22 15:27 ` Christoph Hellwig
2020-09-22 15:34 ` boris.ostrovsky
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