[PATCH 4/5] bio-cgroup: Page tracking hooks
From: Ryo Tsuruta
Date: Thu Apr 16 2009 - 08:31:22 EST
This patch contains several hooks that let the bio-cgroup framework to know
which bio-group is the owner of a page before starting I/O against the page.
Based on 2.6.30-rc1
Signed-off-by: Hirokazu Takahashi <taka@xxxxxxxxxxxxx>
Signed-off-by: Ryo Tsuruta <ryov@xxxxxxxxxxxxx>
---
fs/buffer.c | 2 ++
fs/direct-io.c | 2 ++
mm/Makefile | 1 +
mm/bounce.c | 2 ++
mm/filemap.c | 2 ++
mm/memory.c | 5 +++++
mm/page-writeback.c | 2 ++
mm/swap_state.c | 2 ++
8 files changed, 18 insertions(+)
Index: linux-2.6.30-rc1/fs/buffer.c
===================================================================
--- linux-2.6.30-rc1.orig/fs/buffer.c
+++ linux-2.6.30-rc1/fs/buffer.c
@@ -36,6 +36,7 @@
#include <linux/buffer_head.h>
#include <linux/task_io_accounting_ops.h>
#include <linux/bio.h>
+#include <linux/biotrack.h>
#include <linux/notifier.h>
#include <linux/cpu.h>
#include <linux/bitops.h>
@@ -655,6 +656,7 @@ static void __set_page_dirty(struct page
if (page->mapping) { /* Race with truncate? */
WARN_ON_ONCE(warn && !PageUptodate(page));
account_page_dirtied(page, mapping);
+ bio_cgroup_reset_owner_pagedirty(page, current->mm);
radix_tree_tag_set(&mapping->page_tree,
page_index(page), PAGECACHE_TAG_DIRTY);
}
Index: linux-2.6.30-rc1/fs/direct-io.c
===================================================================
--- linux-2.6.30-rc1.orig/fs/direct-io.c
+++ linux-2.6.30-rc1/fs/direct-io.c
@@ -33,6 +33,7 @@
#include <linux/err.h>
#include <linux/blkdev.h>
#include <linux/buffer_head.h>
+#include <linux/biotrack.h>
#include <linux/rwsem.h>
#include <linux/uio.h>
#include <asm/atomic.h>
@@ -799,6 +800,7 @@ static int do_direct_IO(struct dio *dio)
ret = PTR_ERR(page);
goto out;
}
+ bio_cgroup_reset_owner(page, current->mm);
while (block_in_page < blocks_per_page) {
unsigned offset_in_page = block_in_page << blkbits;
Index: linux-2.6.30-rc1/mm/bounce.c
===================================================================
--- linux-2.6.30-rc1.orig/mm/bounce.c
+++ linux-2.6.30-rc1/mm/bounce.c
@@ -14,6 +14,7 @@
#include <linux/hash.h>
#include <linux/highmem.h>
#include <linux/blktrace_api.h>
+#include <linux/biotrack.h>
#include <trace/block.h>
#include <asm/tlbflush.h>
@@ -212,6 +213,7 @@ static void __blk_queue_bounce(struct re
to->bv_len = from->bv_len;
to->bv_offset = from->bv_offset;
inc_zone_page_state(to->bv_page, NR_BOUNCE);
+ bio_cgroup_copy_owner(to->bv_page, page);
if (rw == WRITE) {
char *vto, *vfrom;
Index: linux-2.6.30-rc1/mm/filemap.c
===================================================================
--- linux-2.6.30-rc1.orig/mm/filemap.c
+++ linux-2.6.30-rc1/mm/filemap.c
@@ -33,6 +33,7 @@
#include <linux/cpuset.h>
#include <linux/hardirq.h> /* for BUG_ON(!in_atomic()) only */
#include <linux/memcontrol.h>
+#include <linux/biotrack.h>
#include <linux/mm_inline.h> /* for page_is_file_cache() */
#include "internal.h"
@@ -463,6 +464,7 @@ int add_to_page_cache_locked(struct page
gfp_mask & GFP_RECLAIM_MASK);
if (error)
goto out;
+ bio_cgroup_set_owner(page, current->mm);
error = radix_tree_preload(gfp_mask & ~__GFP_HIGHMEM);
if (error == 0) {
Index: linux-2.6.30-rc1/mm/Makefile
===================================================================
--- linux-2.6.30-rc1.orig/mm/Makefile
+++ linux-2.6.30-rc1/mm/Makefile
@@ -39,3 +39,4 @@ endif
obj-$(CONFIG_QUICKLIST) += quicklist.o
obj-$(CONFIG_CGROUP_MEM_RES_CTLR) += memcontrol.o
obj-$(CONFIG_CGROUP_PAGE) += page_cgroup.o
+obj-$(CONFIG_CGROUP_BIO) += biotrack.o
Index: linux-2.6.30-rc1/mm/memory.c
===================================================================
--- linux-2.6.30-rc1.orig/mm/memory.c
+++ linux-2.6.30-rc1/mm/memory.c
@@ -51,6 +51,7 @@
#include <linux/init.h>
#include <linux/writeback.h>
#include <linux/memcontrol.h>
+#include <linux/biotrack.h>
#include <linux/mmu_notifier.h>
#include <linux/kallsyms.h>
#include <linux/swapops.h>
@@ -2053,6 +2054,7 @@ gotten:
*/
ptep_clear_flush_notify(vma, address, page_table);
page_add_new_anon_rmap(new_page, vma, address);
+ bio_cgroup_set_owner(new_page, mm);
set_pte_at(mm, address, page_table, entry);
update_mmu_cache(vma, address, entry);
if (old_page) {
@@ -2497,6 +2499,7 @@ static int do_swap_page(struct mm_struct
flush_icache_page(vma, page);
set_pte_at(mm, address, page_table, pte);
page_add_anon_rmap(page, vma, address);
+ bio_cgroup_reset_owner(page, mm);
/* It's better to call commit-charge after rmap is established */
mem_cgroup_commit_charge_swapin(page, ptr);
@@ -2560,6 +2563,7 @@ static int do_anonymous_page(struct mm_s
goto release;
inc_mm_counter(mm, anon_rss);
page_add_new_anon_rmap(page, vma, address);
+ bio_cgroup_set_owner(page, mm);
set_pte_at(mm, address, page_table, entry);
/* No need to invalidate - it was non-present before */
@@ -2712,6 +2716,7 @@ static int __do_fault(struct mm_struct *
if (anon) {
inc_mm_counter(mm, anon_rss);
page_add_new_anon_rmap(page, vma, address);
+ bio_cgroup_set_owner(page, mm);
} else {
inc_mm_counter(mm, file_rss);
page_add_file_rmap(page);
Index: linux-2.6.30-rc1/mm/page-writeback.c
===================================================================
--- linux-2.6.30-rc1.orig/mm/page-writeback.c
+++ linux-2.6.30-rc1/mm/page-writeback.c
@@ -23,6 +23,7 @@
#include <linux/init.h>
#include <linux/backing-dev.h>
#include <linux/task_io_accounting_ops.h>
+#include <linux/biotrack.h>
#include <linux/blkdev.h>
#include <linux/mpage.h>
#include <linux/rmap.h>
@@ -1243,6 +1244,7 @@ int __set_page_dirty_nobuffers(struct pa
BUG_ON(mapping2 != mapping);
WARN_ON_ONCE(!PagePrivate(page) && !PageUptodate(page));
account_page_dirtied(page, mapping);
+ bio_cgroup_reset_owner_pagedirty(page, current->mm);
radix_tree_tag_set(&mapping->page_tree,
page_index(page), PAGECACHE_TAG_DIRTY);
}
Index: linux-2.6.30-rc1/mm/swap_state.c
===================================================================
--- linux-2.6.30-rc1.orig/mm/swap_state.c
+++ linux-2.6.30-rc1/mm/swap_state.c
@@ -18,6 +18,7 @@
#include <linux/pagevec.h>
#include <linux/migrate.h>
#include <linux/page_cgroup.h>
+#include <linux/biotrack.h>
#include <asm/pgtable.h>
@@ -308,6 +309,7 @@ struct page *read_swap_cache_async(swp_e
*/
__set_page_locked(new_page);
SetPageSwapBacked(new_page);
+ bio_cgroup_set_owner(new_page, current->mm);
err = add_to_swap_cache(new_page, entry, gfp_mask & GFP_KERNEL);
if (likely(!err)) {
/*
--
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