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Group short-lived and reclaimable kernel allocations

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This patch marks a number of allocations that are either short-lived such as
network buffers or are reclaimable such as inode allocations.  When something
like updatedb is called, long-lived and unmovable kernel allocations tend to
be spread throughout the address space which increases fragmentation.

This patch groups these allocations together as much as possible by adding a
new MIGRATE_TYPE.  The MIGRATE_RECLAIMABLE type is for allocations that can be
reclaimed on demand, but not moved.  i.e.  they can be migrated by deleting
them and re-reading the information from elsewhere.

Signed-off-by: Mel Gorman <mel@csn.ul.ie>
Cc: Andy Whitcroft <apw@shadowen.org>
Cc: Christoph Lameter <clameter@sgi.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Mel Gorman
2007-10-16 01:25:52 -07:00
committed by Linus Torvalds
parent c361be55b3
commit e12ba74d8f
16 changed files with 56 additions and 28 deletions
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13
fs/proc/base.c
View File

@@ -492,7 +492,7 @@ static ssize_t proc_info_read(struct file * file, char __user * buf,
count = PROC_BLOCK_SIZE;
length = -ENOMEM;
if (!(page = __get_free_page(GFP_KERNEL)))
if (!(page = __get_free_page(GFP_TEMPORARY)))
goto out;
length = PROC_I(inode)->op.proc_read(task, (char*)page);
@@ -532,7 +532,7 @@ static ssize_t mem_read(struct file * file, char __user * buf,
goto out;
ret = -ENOMEM;
page = (char *)__get_free_page(GFP_USER);
page = (char *)__get_free_page(GFP_TEMPORARY);
if (!page)
goto out;
@@ -602,7 +602,7 @@ static ssize_t mem_write(struct file * file, const char __user *buf,
goto out;
copied = -ENOMEM;
page = (char *)__get_free_page(GFP_USER);
page = (char *)__get_free_page(GFP_TEMPORARY);
if (!page)
goto out;
@@ -788,7 +788,7 @@ static ssize_t proc_loginuid_write(struct file * file, const char __user * buf,
/* No partial writes. */
return -EINVAL;
}
page = (char*)__get_free_page(GFP_USER);
page = (char*)__get_free_page(GFP_TEMPORARY);
if (!page)
return -ENOMEM;
length = -EFAULT;
@@ -954,7 +954,8 @@ static int do_proc_readlink(struct dentry *dentry, struct vfsmount *mnt,
char __user *buffer, int buflen)
{
struct inode * inode;
char *tmp = (char*)__get_free_page(GFP_KERNEL), *path;
char *tmp = (char*)__get_free_page(GFP_TEMPORARY);
char *path;
int len;
if (!tmp)
@@ -1726,7 +1727,7 @@ static ssize_t proc_pid_attr_write(struct file * file, const char __user * buf,
goto out;
length = -ENOMEM;
page = (char*)__get_free_page(GFP_USER);
page = (char*)__get_free_page(GFP_TEMPORARY);
if (!page)
goto out;

2
fs/proc/generic.c
View File

@@ -74,7 +74,7 @@ proc_file_read(struct file *file, char __user *buf, size_t nbytes,
nbytes = MAX_NON_LFS - pos;
dp = PDE(inode);
if (!(page = (char*) __get_free_page(GFP_KERNEL)))
if (!(page = (char*) __get_free_page(GFP_TEMPORARY)))
return -ENOMEM;
while ((nbytes > 0) && !eof) {