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Date: Sat, 24 May 2008 18:56:57 +0200
From: Andrea Righi <righi.andrea@...il.com>
To: balbir@...ux.vnet.ibm.com, menage@...gle.com
Cc: matt@...ehost.com, roberto@...it.it, linux-kernel@...r.kernel.org
Subject: [PATCH 3/3] io-throttle accounting and control
Apply the io-throttle controller to the opportune kernel functions. Both
accounting and throttling functionalities are performed by cgroup_io_account().
Signed-off-by: Andrea Righi <righi.andrea@...il.com>
---
block/blk-core.c | 2 ++
fs/buffer.c | 6 ++++++
fs/direct-io.c | 2 ++
mm/page-writeback.c | 5 +++++
mm/readahead.c | 2 ++
5 files changed, 17 insertions(+), 0 deletions(-)
diff --git a/block/blk-core.c b/block/blk-core.c
index 6a9cc0d..d6b3353 100644
--- a/block/blk-core.c
+++ b/block/blk-core.c
@@ -26,6 +26,7 @@
#include <linux/swap.h>
#include <linux/writeback.h>
#include <linux/task_io_accounting_ops.h>
+#include <linux/blk-io-throttle.h>
#include <linux/interrupt.h>
#include <linux/cpu.h>
#include <linux/blktrace_api.h>
@@ -1485,6 +1486,7 @@ void submit_bio(int rw, struct bio *bio)
count_vm_events(PGPGOUT, count);
} else {
task_io_account_read(bio->bi_size);
+ cgroup_io_account(bio->bi_size);
count_vm_events(PGPGIN, count);
}
diff --git a/fs/buffer.c b/fs/buffer.c
index a073f3f..eb4893c 100644
--- a/fs/buffer.c
+++ b/fs/buffer.c
@@ -35,6 +35,7 @@
#include <linux/suspend.h>
#include <linux/buffer_head.h>
#include <linux/task_io_accounting_ops.h>
+#include <linux/blk-io-throttle.h>
#include <linux/bio.h>
#include <linux/notifier.h>
#include <linux/cpu.h>
@@ -700,6 +701,8 @@ EXPORT_SYMBOL(mark_buffer_dirty_inode);
static int __set_page_dirty(struct page *page,
struct address_space *mapping, int warn)
{
+ size_t cgroup_io_acct = 0;
+
if (unlikely(!mapping))
return !TestSetPageDirty(page);
@@ -715,12 +718,15 @@ static int __set_page_dirty(struct page *page,
__inc_bdi_stat(mapping->backing_dev_info,
BDI_RECLAIMABLE);
task_io_account_write(PAGE_CACHE_SIZE);
+ cgroup_io_acct = PAGE_CACHE_SIZE;
}
radix_tree_tag_set(&mapping->page_tree,
page_index(page), PAGECACHE_TAG_DIRTY);
}
write_unlock_irq(&mapping->tree_lock);
__mark_inode_dirty(mapping->host, I_DIRTY_PAGES);
+ if (cgroup_io_acct)
+ cgroup_io_account(cgroup_io_acct);
return 1;
}
diff --git a/fs/direct-io.c b/fs/direct-io.c
index 9e81add..1b82224 100644
--- a/fs/direct-io.c
+++ b/fs/direct-io.c
@@ -35,6 +35,7 @@
#include <linux/buffer_head.h>
#include <linux/rwsem.h>
#include <linux/uio.h>
+#include <linux/blk-io-throttle.h>
#include <asm/atomic.h>
/*
@@ -667,6 +668,7 @@ submit_page_section(struct dio *dio, struct page *page,
* Read accounting is performed in submit_bio()
*/
task_io_account_write(len);
+ cgroup_io_account(len);
}
/*
diff --git a/mm/page-writeback.c b/mm/page-writeback.c
index 789b6ad..97a0c74 100644
--- a/mm/page-writeback.c
+++ b/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/blk-io-throttle.h>
#include <linux/blkdev.h>
#include <linux/mpage.h>
#include <linux/rmap.h>
@@ -1077,6 +1078,7 @@ int __set_page_dirty_nobuffers(struct page *page)
if (!TestSetPageDirty(page)) {
struct address_space *mapping = page_mapping(page);
struct address_space *mapping2;
+ size_t cgroup_io_acct = 0;
if (!mapping)
return 1;
@@ -1091,6 +1093,7 @@ int __set_page_dirty_nobuffers(struct page *page)
__inc_bdi_stat(mapping->backing_dev_info,
BDI_RECLAIMABLE);
task_io_account_write(PAGE_CACHE_SIZE);
+ cgroup_io_acct = PAGE_CACHE_SIZE;
}
radix_tree_tag_set(&mapping->page_tree,
page_index(page), PAGECACHE_TAG_DIRTY);
@@ -1100,6 +1103,8 @@ int __set_page_dirty_nobuffers(struct page *page)
/* !PageAnon && !swapper_space */
__mark_inode_dirty(mapping->host, I_DIRTY_PAGES);
}
+ if (cgroup_io_acct)
+ cgroup_io_account(cgroup_io_acct);
return 1;
}
return 0;
diff --git a/mm/readahead.c b/mm/readahead.c
index d8723a5..fe2f865 100644
--- a/mm/readahead.c
+++ b/mm/readahead.c
@@ -14,6 +14,7 @@
#include <linux/blkdev.h>
#include <linux/backing-dev.h>
#include <linux/task_io_accounting_ops.h>
+#include <linux/blk-io-throttle.h>
#include <linux/pagevec.h>
#include <linux/pagemap.h>
@@ -76,6 +77,7 @@ int read_cache_pages(struct address_space *mapping, struct list_head *pages,
break;
}
task_io_account_read(PAGE_CACHE_SIZE);
+ cgroup_io_account(PAGE_CACHE_SIZE);
}
return ret;
}
--
1.5.4.3
--
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