| lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
|
Open Source and information security mailing list archives
| ||
|
Message-ID: <alpine.LSU.2.00.1105301742220.5482@sister.anvils>
Date: Mon, 30 May 2011 17:43:44 -0700 (PDT)
From: Hugh Dickins <hughd@...gle.com>
To: Andrew Morton <akpm@...ux-foundation.org>
cc: Chris Wilson <chris@...is-wilson.co.uk>,
Keith Packard <keithp@...thp.com>,
Dave Airlie <airlied@...hat.com>, linux-kernel@...r.kernel.org,
linux-mm@...ck.org
Subject: [PATCH 6/14] drm/i915: use shmem_read_mapping_page
Soon tmpfs will stop supporting ->readpage and read_cache_page_gfp():
once "tmpfs: add shmem_read_mapping_page_gfp" has been applied,
this patch can be applied to ease the transition.
i915_gem_object_get_pages_gtt() use shmem_read_mapping_page_gfp() in
the one place it's needed; elsewhere use shmem_read_mapping_page(),
with the mapping's gfp_mask properly initialized.
Forget about __GFP_COLD: since tmpfs initializes its pages with memset,
asking for a cold page is counter-productive.
Signed-off-by: Hugh Dickins <hughd@...gle.com>
Cc: Chris Wilson <chris@...is-wilson.co.uk>
Cc: Keith Packard <keithp@...thp.com>
Cc: Dave Airlie <airlied@...hat.com>
---
drivers/gpu/drm/i915/i915_gem.c | 30 +++++++++++++-----------------
1 file changed, 13 insertions(+), 17 deletions(-)
--- linux.orig/drivers/gpu/drm/i915/i915_gem.c 2011-05-30 13:56:10.068796399 -0700
+++ linux/drivers/gpu/drm/i915/i915_gem.c 2011-05-30 14:26:13.121737248 -0700
@@ -359,8 +359,7 @@ i915_gem_shmem_pread_fast(struct drm_dev
if ((page_offset + remain) > PAGE_SIZE)
page_length = PAGE_SIZE - page_offset;
- page = read_cache_page_gfp(mapping, offset >> PAGE_SHIFT,
- GFP_HIGHUSER | __GFP_RECLAIMABLE);
+ page = shmem_read_mapping_page(mapping, offset >> PAGE_SHIFT);
if (IS_ERR(page))
return PTR_ERR(page);
@@ -463,8 +462,7 @@ i915_gem_shmem_pread_slow(struct drm_dev
if ((data_page_offset + page_length) > PAGE_SIZE)
page_length = PAGE_SIZE - data_page_offset;
- page = read_cache_page_gfp(mapping, offset >> PAGE_SHIFT,
- GFP_HIGHUSER | __GFP_RECLAIMABLE);
+ page = shmem_read_mapping_page(mapping, offset >> PAGE_SHIFT);
if (IS_ERR(page))
return PTR_ERR(page);
@@ -796,8 +794,7 @@ i915_gem_shmem_pwrite_fast(struct drm_de
if ((page_offset + remain) > PAGE_SIZE)
page_length = PAGE_SIZE - page_offset;
- page = read_cache_page_gfp(mapping, offset >> PAGE_SHIFT,
- GFP_HIGHUSER | __GFP_RECLAIMABLE);
+ page = shmem_read_mapping_page(mapping, offset >> PAGE_SHIFT);
if (IS_ERR(page))
return PTR_ERR(page);
@@ -906,8 +903,7 @@ i915_gem_shmem_pwrite_slow(struct drm_de
if ((data_page_offset + page_length) > PAGE_SIZE)
page_length = PAGE_SIZE - data_page_offset;
- page = read_cache_page_gfp(mapping, offset >> PAGE_SHIFT,
- GFP_HIGHUSER | __GFP_RECLAIMABLE);
+ page = shmem_read_mapping_page(mapping, offset >> PAGE_SHIFT);
if (IS_ERR(page)) {
ret = PTR_ERR(page);
goto out;
@@ -1556,12 +1552,10 @@ i915_gem_object_get_pages_gtt(struct drm
inode = obj->base.filp->f_path.dentry->d_inode;
mapping = inode->i_mapping;
+ gfpmask |= mapping_gfp_mask(mapping);
+
for (i = 0; i < page_count; i++) {
- page = read_cache_page_gfp(mapping, i,
- GFP_HIGHUSER |
- __GFP_COLD |
- __GFP_RECLAIMABLE |
- gfpmask);
+ page = shmem_read_mapping_page_gfp(mapping, i, gfpmask);
if (IS_ERR(page))
goto err_pages;
@@ -3565,6 +3559,7 @@ struct drm_i915_gem_object *i915_gem_all
{
struct drm_i915_private *dev_priv = dev->dev_private;
struct drm_i915_gem_object *obj;
+ struct address_space *mapping;
obj = kzalloc(sizeof(*obj), GFP_KERNEL);
if (obj == NULL)
@@ -3575,6 +3570,9 @@ struct drm_i915_gem_object *i915_gem_all
return NULL;
}
+ mapping = obj->base.filp->f_path.dentry->d_inode->i_mapping;
+ mapping_set_gfp_mask(mapping, GFP_HIGHUSER | __GFP_RECLAIMABLE);
+
i915_gem_info_add_obj(dev_priv, size);
obj->base.write_domain = I915_GEM_DOMAIN_CPU;
@@ -3950,8 +3948,7 @@ void i915_gem_detach_phys_object(struct
page_count = obj->base.size / PAGE_SIZE;
for (i = 0; i < page_count; i++) {
- struct page *page = read_cache_page_gfp(mapping, i,
- GFP_HIGHUSER | __GFP_RECLAIMABLE);
+ struct page *page = shmem_read_mapping_page(mapping, i);
if (!IS_ERR(page)) {
char *dst = kmap_atomic(page);
memcpy(dst, vaddr + i*PAGE_SIZE, PAGE_SIZE);
@@ -4012,8 +4009,7 @@ i915_gem_attach_phys_object(struct drm_d
struct page *page;
char *dst, *src;
- page = read_cache_page_gfp(mapping, i,
- GFP_HIGHUSER | __GFP_RECLAIMABLE);
+ page = shmem_read_mapping_page(mapping, i);
if (IS_ERR(page))
return PTR_ERR(page);
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
Powered by blists - more mailing lists