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Subject[PATCH 1/7] Add __GFP_EASYRCLM flag and update callers
Date

This creates a zone modifier __GFP_EASYRCLM and a set of GFP flags called
GFP_RCLMUSER. The only difference between GFP_HIGHUSER and GFP_RCLMUSER is the
zone that is used. Callers appropriate to use the ZONE_EASYRCLM are changed.

Signed-off-by: Mel Gorman <mel@csn.ul.ie>
diff -rup -X /usr/src/patchset-0.5/bin//dontdiff linux-2.6.16-rc3-mm1-clean/fs/compat.c linux-2.6.16-rc3-mm1-101_antifrag_flags/fs/compat.c
--- linux-2.6.16-rc3-mm1-clean/fs/compat.c 2006-02-13 00:27:25.000000000 +0000
+++ linux-2.6.16-rc3-mm1-101_antifrag_flags/fs/compat.c 2006-02-17 09:41:14.000000000 +0000
@@ -1397,7 +1397,7 @@ static int compat_copy_strings(int argc,
page = bprm->page[i];
new = 0;
if (!page) {
- page = alloc_page(GFP_HIGHUSER);
+ page = alloc_page(GFP_RCLMUSER);
bprm->page[i] = page;
if (!page) {
ret = -ENOMEM;
diff -rup -X /usr/src/patchset-0.5/bin//dontdiff linux-2.6.16-rc3-mm1-clean/fs/exec.c linux-2.6.16-rc3-mm1-101_antifrag_flags/fs/exec.c
--- linux-2.6.16-rc3-mm1-clean/fs/exec.c 2006-02-16 09:50:43.000000000 +0000
+++ linux-2.6.16-rc3-mm1-101_antifrag_flags/fs/exec.c 2006-02-17 09:41:14.000000000 +0000
@@ -238,7 +238,7 @@ static int copy_strings(int argc, char _
page = bprm->page[i];
new = 0;
if (!page) {
- page = alloc_page(GFP_HIGHUSER);
+ page = alloc_page(GFP_RCLMUSER);
bprm->page[i] = page;
if (!page) {
ret = -ENOMEM;
diff -rup -X /usr/src/patchset-0.5/bin//dontdiff linux-2.6.16-rc3-mm1-clean/fs/inode.c linux-2.6.16-rc3-mm1-101_antifrag_flags/fs/inode.c
--- linux-2.6.16-rc3-mm1-clean/fs/inode.c 2006-02-16 09:50:43.000000000 +0000
+++ linux-2.6.16-rc3-mm1-101_antifrag_flags/fs/inode.c 2006-02-17 09:41:14.000000000 +0000
@@ -147,7 +147,7 @@ static struct inode *alloc_inode(struct
mapping->a_ops = &empty_aops;
mapping->host = inode;
mapping->flags = 0;
- mapping_set_gfp_mask(mapping, GFP_HIGHUSER);
+ mapping_set_gfp_mask(mapping, GFP_RCLMUSER);
mapping->assoc_mapping = NULL;
mapping->backing_dev_info = &default_backing_dev_info;

diff -rup -X /usr/src/patchset-0.5/bin//dontdiff linux-2.6.16-rc3-mm1-clean/include/asm-i386/page.h linux-2.6.16-rc3-mm1-101_antifrag_flags/include/asm-i386/page.h
--- linux-2.6.16-rc3-mm1-clean/include/asm-i386/page.h 2006-02-13 00:27:25.000000000 +0000
+++ linux-2.6.16-rc3-mm1-101_antifrag_flags/include/asm-i386/page.h 2006-02-17 09:41:14.000000000 +0000
@@ -36,7 +36,8 @@
#define clear_user_page(page, vaddr, pg) clear_page(page)
#define copy_user_page(to, from, vaddr, pg) copy_page(to, from)

-#define alloc_zeroed_user_highpage(vma, vaddr) alloc_page_vma(GFP_HIGHUSER | __GFP_ZERO, vma, vaddr)
+#define alloc_zeroed_user_highpage(vma, vaddr) \
+ alloc_page_vma(GFP_RCLMUSER | __GFP_ZERO, vma, vaddr)
#define __HAVE_ARCH_ALLOC_ZEROED_USER_HIGHPAGE

/*
diff -rup -X /usr/src/patchset-0.5/bin//dontdiff linux-2.6.16-rc3-mm1-clean/include/linux/gfp.h linux-2.6.16-rc3-mm1-101_antifrag_flags/include/linux/gfp.h
--- linux-2.6.16-rc3-mm1-clean/include/linux/gfp.h 2006-02-13 00:27:25.000000000 +0000
+++ linux-2.6.16-rc3-mm1-101_antifrag_flags/include/linux/gfp.h 2006-02-17 09:41:14.000000000 +0000
@@ -21,6 +21,7 @@ struct vm_area_struct;
#else
#define __GFP_DMA32 ((__force gfp_t)0x04) /* Has own ZONE_DMA32 */
#endif
+#define __GFP_EASYRCLM ((__force gfp_t)0x08u)

/*
* Action modifiers - doesn't change the zoning
@@ -65,6 +66,8 @@ struct vm_area_struct;
#define GFP_USER (__GFP_WAIT | __GFP_IO | __GFP_FS | __GFP_HARDWALL)
#define GFP_HIGHUSER (__GFP_WAIT | __GFP_IO | __GFP_FS | __GFP_HARDWALL | \
__GFP_HIGHMEM)
+#define GFP_RCLMUSER (__GFP_WAIT | __GFP_IO | __GFP_FS | __GFP_HARDWALL | \
+ __GFP_EASYRCLM)

/* Flag - indicates that the buffer will be suitable for DMA. Ignored on some
platforms, used as appropriate on others */
diff -rup -X /usr/src/patchset-0.5/bin//dontdiff linux-2.6.16-rc3-mm1-clean/include/linux/highmem.h linux-2.6.16-rc3-mm1-101_antifrag_flags/include/linux/highmem.h
--- linux-2.6.16-rc3-mm1-clean/include/linux/highmem.h 2006-02-13 00:27:25.000000000 +0000
+++ linux-2.6.16-rc3-mm1-101_antifrag_flags/include/linux/highmem.h 2006-02-17 09:41:14.000000000 +0000
@@ -47,7 +47,7 @@ static inline void clear_user_highpage(s
static inline struct page *
alloc_zeroed_user_highpage(struct vm_area_struct *vma, unsigned long vaddr)
{
- struct page *page = alloc_page_vma(GFP_HIGHUSER, vma, vaddr);
+ struct page *page = alloc_page_vma(GFP_RCLMUSER, vma, vaddr);

if (page)
clear_user_highpage(page, vaddr);
diff -rup -X /usr/src/patchset-0.5/bin//dontdiff linux-2.6.16-rc3-mm1-clean/mm/memory.c linux-2.6.16-rc3-mm1-101_antifrag_flags/mm/memory.c
--- linux-2.6.16-rc3-mm1-clean/mm/memory.c 2006-02-16 09:50:44.000000000 +0000
+++ linux-2.6.16-rc3-mm1-101_antifrag_flags/mm/memory.c 2006-02-17 09:41:14.000000000 +0000
@@ -1480,7 +1480,7 @@ gotten:
if (!new_page)
goto oom;
} else {
- new_page = alloc_page_vma(GFP_HIGHUSER, vma, address);
+ new_page = alloc_page_vma(GFP_RCLMUSER, vma, address);
if (!new_page)
goto oom;
cow_user_page(new_page, old_page, address);
@@ -2079,7 +2079,7 @@ retry:

if (unlikely(anon_vma_prepare(vma)))
goto oom;
- page = alloc_page_vma(GFP_HIGHUSER, vma, address);
+ page = alloc_page_vma(GFP_RCLMUSER, vma, address);
if (!page)
goto oom;
copy_user_highpage(page, new_page, address);
diff -rup -X /usr/src/patchset-0.5/bin//dontdiff linux-2.6.16-rc3-mm1-clean/mm/shmem.c linux-2.6.16-rc3-mm1-101_antifrag_flags/mm/shmem.c
--- linux-2.6.16-rc3-mm1-clean/mm/shmem.c 2006-02-16 09:50:44.000000000 +0000
+++ linux-2.6.16-rc3-mm1-101_antifrag_flags/mm/shmem.c 2006-02-17 09:41:14.000000000 +0000
@@ -921,6 +921,8 @@ shmem_alloc_page(gfp_t gfp, struct shmem
pvma.vm_policy = mpol_shared_policy_lookup(&info->policy, idx);
pvma.vm_pgoff = idx;
pvma.vm_end = PAGE_SIZE;
+ if (gfp & __GFP_HIGHMEM)
+ gfp = (gfp & ~__GFP_HIGHMEM) | __GFP_EASYRCLM;
page = alloc_page_vma(gfp | __GFP_ZERO, &pvma, 0);
mpol_free(pvma.vm_policy);
return page;
@@ -936,6 +938,8 @@ shmem_swapin(struct shmem_inode_info *in
static inline struct page *
shmem_alloc_page(gfp_t gfp,struct shmem_inode_info *info, unsigned long idx)
{
+ if (gfp & __GFP_HIGHMEM)
+ gfp = (gfp & ~__GFP_HIGHMEM) | __GFP_EASYRCLM;
return alloc_page(gfp | __GFP_ZERO);
}
#endif
diff -rup -X /usr/src/patchset-0.5/bin//dontdiff linux-2.6.16-rc3-mm1-clean/mm/swap_state.c linux-2.6.16-rc3-mm1-101_antifrag_flags/mm/swap_state.c
--- linux-2.6.16-rc3-mm1-clean/mm/swap_state.c 2006-02-13 00:27:25.000000000 +0000
+++ linux-2.6.16-rc3-mm1-101_antifrag_flags/mm/swap_state.c 2006-02-17 09:41:14.000000000 +0000
@@ -334,7 +334,7 @@ struct page *read_swap_cache_async(swp_e
* Get a new page to read into from swap.
*/
if (!new_page) {
- new_page = alloc_page_vma(GFP_HIGHUSER, vma, addr);
+ new_page = alloc_page_vma(GFP_RCLMUSER, vma, addr);
if (!new_page)
break; /* Out of memory */
}
-
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