diff options
| author | Theodore Ts'o <tytso@mit.edu> | 2011-08-01 08:45:02 -0400 |
|---|---|---|
| committer | Theodore Ts'o <tytso@mit.edu> | 2011-08-01 08:45:02 -0400 |
| commit | 9933fc0ac1ac14b795819cd63d05ea92112f690a (patch) | |
| tree | bff42e3494fd5401e6b171ddae8f52ecd1defd91 | |
| parent | 33853a0dde359ded0534204eb6857ad5166d515b (diff) | |
ext4: introduce ext4_kvmalloc(), ext4_kzalloc(), and ext4_kvfree()
Introduce new helper functions which try kmalloc, and then fall back
to vmalloc if necessary, and use them for allocating and deallocating
s_flex_groups.
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
| -rw-r--r-- | fs/ext4/ext4.h | 3 | ||||
| -rw-r--r-- | fs/ext4/super.c | 54 |
2 files changed, 39 insertions, 18 deletions
diff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.h index ba2009b49a55..db9feadf53a0 100644 --- a/fs/ext4/ext4.h +++ b/fs/ext4/ext4.h @@ -1874,6 +1874,9 @@ extern int ext4_group_extend(struct super_block *sb, ext4_fsblk_t n_blocks_count); /* super.c */ +extern void *ext4_kvmalloc(size_t size, gfp_t flags); +extern void *ext4_kvzalloc(size_t size, gfp_t flags); +extern void ext4_kvfree(void *ptr); extern void __ext4_error(struct super_block *, const char *, unsigned int, const char *, ...) __attribute__ ((format (printf, 4, 5))); diff --git a/fs/ext4/super.c b/fs/ext4/super.c index cfe9f39c4ba2..658f5864e9cf 100644 --- a/fs/ext4/super.c +++ b/fs/ext4/super.c @@ -110,6 +110,35 @@ static struct file_system_type ext3_fs_type = { #define IS_EXT3_SB(sb) (0) #endif +void *ext4_kvmalloc(size_t size, gfp_t flags) +{ + void *ret; + + ret = kmalloc(size, flags); + if (!ret) + ret = __vmalloc(size, flags, PAGE_KERNEL); + return ret; +} + +void *ext4_kvzalloc(size_t size, gfp_t flags) +{ + void *ret; + + ret = kmalloc(size, flags); + if (!ret) + ret = __vmalloc(size, flags | __GFP_ZERO, PAGE_KERNEL); + return ret; +} + +void ext4_kvfree(void *ptr) +{ + if (is_vmalloc_addr(ptr)) + vfree(ptr); + else + kfree(ptr); + +} + ext4_fsblk_t ext4_block_bitmap(struct super_block *sb, struct ext4_group_desc *bg) { @@ -791,10 +820,7 @@ static void ext4_put_super(struct super_block *sb) for (i = 0; i < sbi->s_gdb_count; i++) brelse(sbi->s_group_desc[i]); kfree(sbi->s_group_desc); - if (is_vmalloc_addr(sbi->s_flex_groups)) - vfree(sbi->s_flex_groups); - else - kfree(sbi->s_flex_groups); + ext4_kvfree(sbi->s_flex_groups); percpu_counter_destroy(&sbi->s_freeblocks_counter); percpu_counter_destroy(&sbi->s_freeinodes_counter); percpu_counter_destroy(&sbi->s_dirs_counter); @@ -1977,15 +2003,11 @@ static int ext4_fill_flex_info(struct super_block *sb) ((le16_to_cpu(sbi->s_es->s_reserved_gdt_blocks) + 1) << EXT4_DESC_PER_BLOCK_BITS(sb))) / groups_per_flex; size = flex_group_count * sizeof(struct flex_groups); - sbi->s_flex_groups = kzalloc(size, GFP_KERNEL); + sbi->s_flex_groups = ext4_kvzalloc(size, GFP_KERNEL); if (sbi->s_flex_groups == NULL) { - sbi->s_flex_groups = vzalloc(size); - if (sbi->s_flex_groups == NULL) { - ext4_msg(sb, KERN_ERR, - "not enough memory for %u flex groups", - flex_group_count); - goto failed; - } + ext4_msg(sb, KERN_ERR, "not enough memory for %u flex groups", + flex_group_count); + goto failed; } for (i = 0; i < sbi->s_groups_count; i++) { @@ -3750,12 +3772,8 @@ failed_mount_wq: } failed_mount3: del_timer(&sbi->s_err_report); - if (sbi->s_flex_groups) { - if (is_vmalloc_addr(sbi->s_flex_groups)) - vfree(sbi->s_flex_groups); - else - kfree(sbi->s_flex_groups); - } + if (sbi->s_flex_groups) + ext4_kvfree(sbi->s_flex_groups); percpu_counter_destroy(&sbi->s_freeblocks_counter); percpu_counter_destroy(&sbi->s_freeinodes_counter); percpu_counter_destroy(&sbi->s_dirs_counter); |