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Date: Thu, 13 Mar 2008 16:48:08 -0400
From: Josef Bacik <jbacik@...hat.com>
To: linux-ext4@...r.kernel.org
Subject: [PATCH] fix ext3/4 allocation problems
Hello,
Seems theres a few places where we make allocations with GFP_KERNEL while in a
transaction, which can be dangerous under memory pressure as we can re-enter the
fs stuff trying to free up memory. This patch just goes through and changes the
GFP_KERNEL allocations that occur under a transaction to GFP_NOFS to keep this
problem from happening. Thank you,
Signed-off-by: Josef Bacik <jbacik@...hat.com>
Index: linux-2.6/fs/ext3/acl.c
===================================================================
--- linux-2.6.orig/fs/ext3/acl.c
+++ linux-2.6/fs/ext3/acl.c
@@ -37,7 +37,7 @@ ext3_acl_from_disk(const void *value, si
return ERR_PTR(-EINVAL);
if (count == 0)
return NULL;
- acl = posix_acl_alloc(count, GFP_KERNEL);
+ acl = posix_acl_alloc(count, GFP_NOFS);
if (!acl)
return ERR_PTR(-ENOMEM);
for (n=0; n < count; n++) {
@@ -91,7 +91,7 @@ ext3_acl_to_disk(const struct posix_acl
*size = ext3_acl_size(acl->a_count);
ext_acl = kmalloc(sizeof(ext3_acl_header) + acl->a_count *
- sizeof(ext3_acl_entry), GFP_KERNEL);
+ sizeof(ext3_acl_entry), GFP_NOFS);
if (!ext_acl)
return ERR_PTR(-ENOMEM);
ext_acl->a_version = cpu_to_le32(EXT3_ACL_VERSION);
@@ -187,7 +187,7 @@ ext3_get_acl(struct inode *inode, int ty
}
retval = ext3_xattr_get(inode, name_index, "", NULL, 0);
if (retval > 0) {
- value = kmalloc(retval, GFP_KERNEL);
+ value = kmalloc(retval, GFP_NOFS);
if (!value)
return ERR_PTR(-ENOMEM);
retval = ext3_xattr_get(inode, name_index, "", value, retval);
@@ -335,7 +335,7 @@ ext3_init_acl(handle_t *handle, struct i
if (error)
goto cleanup;
}
- clone = posix_acl_clone(acl, GFP_KERNEL);
+ clone = posix_acl_clone(acl, GFP_NOFS);
error = -ENOMEM;
if (!clone)
goto cleanup;
Index: linux-2.6/fs/ext3/resize.c
===================================================================
--- linux-2.6.orig/fs/ext3/resize.c
+++ linux-2.6/fs/ext3/resize.c
@@ -485,7 +485,7 @@ static int add_new_gdb(handle_t *handle,
goto exit_dindj;
n_group_desc = kmalloc((gdb_num + 1) * sizeof(struct buffer_head *),
- GFP_KERNEL);
+ GFP_NOFS);
if (!n_group_desc) {
err = -ENOMEM;
ext3_warning (sb, __FUNCTION__,
@@ -568,7 +568,7 @@ static int reserve_backup_gdb(handle_t *
int res, i;
int err;
- primary = kmalloc(reserved_gdb * sizeof(*primary), GFP_KERNEL);
+ primary = kmalloc(reserved_gdb * sizeof(*primary), GFP_NOFS);
if (!primary)
return -ENOMEM;
Index: linux-2.6/fs/ext3/xattr.c
===================================================================
--- linux-2.6.orig/fs/ext3/xattr.c
+++ linux-2.6/fs/ext3/xattr.c
@@ -728,7 +728,7 @@ ext3_xattr_block_set(handle_t *handle, s
ce = NULL;
}
ea_bdebug(bs->bh, "cloning");
- s->base = kmalloc(bs->bh->b_size, GFP_KERNEL);
+ s->base = kmalloc(bs->bh->b_size, GFP_NOFS);
error = -ENOMEM;
if (s->base == NULL)
goto cleanup;
@@ -740,7 +740,7 @@ ext3_xattr_block_set(handle_t *handle, s
}
} else {
/* Allocate a buffer where we construct the new block. */
- s->base = kzalloc(sb->s_blocksize, GFP_KERNEL);
+ s->base = kzalloc(sb->s_blocksize, GFP_NOFS);
/* assert(header == s->base) */
error = -ENOMEM;
if (s->base == NULL)
Index: linux-2.6/fs/ext4/acl.c
===================================================================
--- linux-2.6.orig/fs/ext4/acl.c
+++ linux-2.6/fs/ext4/acl.c
@@ -37,7 +37,7 @@ ext4_acl_from_disk(const void *value, si
return ERR_PTR(-EINVAL);
if (count == 0)
return NULL;
- acl = posix_acl_alloc(count, GFP_KERNEL);
+ acl = posix_acl_alloc(count, GFP_NOFS);
if (!acl)
return ERR_PTR(-ENOMEM);
for (n=0; n < count; n++) {
@@ -91,7 +91,7 @@ ext4_acl_to_disk(const struct posix_acl
*size = ext4_acl_size(acl->a_count);
ext_acl = kmalloc(sizeof(ext4_acl_header) + acl->a_count *
- sizeof(ext4_acl_entry), GFP_KERNEL);
+ sizeof(ext4_acl_entry), GFP_NOFS);
if (!ext_acl)
return ERR_PTR(-ENOMEM);
ext_acl->a_version = cpu_to_le32(EXT4_ACL_VERSION);
@@ -187,7 +187,7 @@ ext4_get_acl(struct inode *inode, int ty
}
retval = ext4_xattr_get(inode, name_index, "", NULL, 0);
if (retval > 0) {
- value = kmalloc(retval, GFP_KERNEL);
+ value = kmalloc(retval, GFP_NOFS);
if (!value)
return ERR_PTR(-ENOMEM);
retval = ext4_xattr_get(inode, name_index, "", value, retval);
@@ -335,7 +335,7 @@ ext4_init_acl(handle_t *handle, struct i
if (error)
goto cleanup;
}
- clone = posix_acl_clone(acl, GFP_KERNEL);
+ clone = posix_acl_clone(acl, GFP_NOFS);
error = -ENOMEM;
if (!clone)
goto cleanup;
Index: linux-2.6/fs/ext4/extents.c
===================================================================
--- linux-2.6.orig/fs/ext4/extents.c
+++ linux-2.6/fs/ext4/extents.c
@@ -2009,7 +2009,7 @@ int ext4_ext_remove_space(struct inode *
* We start scanning from right side, freeing all the blocks
* after i_size and walking into the tree depth-wise.
*/
- path = kzalloc(sizeof(struct ext4_ext_path) * (depth + 1), GFP_KERNEL);
+ path = kzalloc(sizeof(struct ext4_ext_path) * (depth + 1), GFP_NOFS);
if (path == NULL) {
ext4_journal_stop(handle);
return -ENOMEM;
Index: linux-2.6/fs/ext4/resize.c
===================================================================
--- linux-2.6.orig/fs/ext4/resize.c
+++ linux-2.6/fs/ext4/resize.c
@@ -469,7 +469,7 @@ static int add_new_gdb(handle_t *handle,
goto exit_dindj;
n_group_desc = kmalloc((gdb_num + 1) * sizeof(struct buffer_head *),
- GFP_KERNEL);
+ GFP_NOFS);
if (!n_group_desc) {
err = -ENOMEM;
ext4_warning (sb, __func__,
@@ -552,7 +552,7 @@ static int reserve_backup_gdb(handle_t *
int res, i;
int err;
- primary = kmalloc(reserved_gdb * sizeof(*primary), GFP_KERNEL);
+ primary = kmalloc(reserved_gdb * sizeof(*primary), GFP_NOFS);
if (!primary)
return -ENOMEM;
Index: linux-2.6/fs/ext4/xattr.c
===================================================================
--- linux-2.6.orig/fs/ext4/xattr.c
+++ linux-2.6/fs/ext4/xattr.c
@@ -739,7 +739,7 @@ ext4_xattr_block_set(handle_t *handle, s
ce = NULL;
}
ea_bdebug(bs->bh, "cloning");
- s->base = kmalloc(bs->bh->b_size, GFP_KERNEL);
+ s->base = kmalloc(bs->bh->b_size, GFP_NOFS);
error = -ENOMEM;
if (s->base == NULL)
goto cleanup;
@@ -751,7 +751,7 @@ ext4_xattr_block_set(handle_t *handle, s
}
} else {
/* Allocate a buffer where we construct the new block. */
- s->base = kzalloc(sb->s_blocksize, GFP_KERNEL);
+ s->base = kzalloc(sb->s_blocksize, GFP_NOFS);
/* assert(header == s->base) */
error = -ENOMEM;
if (s->base == NULL)
--
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