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authorMel Gorman <mel@csn.ul.ie>2007-10-16 12:25:52 +0400
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-10-16 20:43:00 +0400
commite12ba74d8ff3e2f73a583500d7095e406df4d093 (patch)
treea0d3385b65f0b3e1e00b0bbf11b75e7538a93edb /fs
parentc361be55b3128474aa66d31092db330b07539103 (diff)
downloadlinux-e12ba74d8ff3e2f73a583500d7095e406df4d093.tar.xz
Group short-lived and reclaimable kernel allocations
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>
Diffstat (limited to 'fs')
-rw-r--r--fs/buffer.c3
-rw-r--r--fs/dcache.c2
-rw-r--r--fs/jbd/journal.c4
-rw-r--r--fs/jbd/revoke.c6
-rw-r--r--fs/proc/base.c13
-rw-r--r--fs/proc/generic.c2
6 files changed, 17 insertions, 13 deletions
diff --git a/fs/buffer.c b/fs/buffer.c
index a406cfd89e3b..faceb5eecca9 100644
--- a/fs/buffer.c
+++ b/fs/buffer.c
@@ -3169,7 +3169,8 @@ static void recalc_bh_state(void)
struct buffer_head *alloc_buffer_head(gfp_t gfp_flags)
{
- struct buffer_head *ret = kmem_cache_zalloc(bh_cachep, gfp_flags);
+ struct buffer_head *ret = kmem_cache_zalloc(bh_cachep,
+ set_migrateflags(gfp_flags, __GFP_RECLAIMABLE));
if (ret) {
INIT_LIST_HEAD(&ret->b_assoc_buffers);
get_cpu_var(bh_accounting).nr++;
diff --git a/fs/dcache.c b/fs/dcache.c
index 678d39deb607..7da0cf50873e 100644
--- a/fs/dcache.c
+++ b/fs/dcache.c
@@ -903,7 +903,7 @@ struct dentry *d_alloc(struct dentry * parent, const struct qstr *name)
struct dentry *dentry;
char *dname;
- dentry = kmem_cache_alloc(dentry_cache, GFP_KERNEL);
+ dentry = kmem_cache_alloc(dentry_cache, GFP_KERNEL);
if (!dentry)
return NULL;
diff --git a/fs/jbd/journal.c b/fs/jbd/journal.c
index 06ab3c10b1b8..a6be78c05dce 100644
--- a/fs/jbd/journal.c
+++ b/fs/jbd/journal.c
@@ -1710,7 +1710,7 @@ static int journal_init_journal_head_cache(void)
journal_head_cache = kmem_cache_create("journal_head",
sizeof(struct journal_head),
0, /* offset */
- 0, /* flags */
+ SLAB_TEMPORARY, /* flags */
NULL); /* ctor */
retval = 0;
if (journal_head_cache == 0) {
@@ -2006,7 +2006,7 @@ static int __init journal_init_handle_cache(void)
jbd_handle_cache = kmem_cache_create("journal_handle",
sizeof(handle_t),
0, /* offset */
- 0, /* flags */
+ SLAB_TEMPORARY, /* flags */
NULL); /* ctor */
if (jbd_handle_cache == NULL) {
printk(KERN_EMERG "JBD: failed to create handle cache\n");
diff --git a/fs/jbd/revoke.c b/fs/jbd/revoke.c
index 62e13c8db132..ad2eacf570c6 100644
--- a/fs/jbd/revoke.c
+++ b/fs/jbd/revoke.c
@@ -170,13 +170,15 @@ int __init journal_init_revoke_caches(void)
{
revoke_record_cache = kmem_cache_create("revoke_record",
sizeof(struct jbd_revoke_record_s),
- 0, SLAB_HWCACHE_ALIGN, NULL);
+ 0,
+ SLAB_HWCACHE_ALIGN|SLAB_TEMPORARY,
+ NULL);
if (revoke_record_cache == 0)
return -ENOMEM;
revoke_table_cache = kmem_cache_create("revoke_table",
sizeof(struct jbd_revoke_table_s),
- 0, 0, NULL);
+ 0, SLAB_TEMPORARY, NULL);
if (revoke_table_cache == 0) {
kmem_cache_destroy(revoke_record_cache);
revoke_record_cache = NULL;
diff --git a/fs/proc/base.c b/fs/proc/base.c
index e5d0953d4db1..78fdfea1a7f8 100644
--- a/fs/proc/base.c
+++ b/fs/proc/base.c
@@ -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;
diff --git a/fs/proc/generic.c b/fs/proc/generic.c
index b5e7155d30d8..1bdb62435758 100644
--- a/fs/proc/generic.c
+++ b/fs/proc/generic.c
@@ -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) {