Messages in this thread | | | Date | Thu, 25 May 2017 14:27:21 -0700 | From | Omar Sandoval <> | Subject | Re: [PATCH] btrfs: Use kvzalloc instead of kzalloc/vmalloc in alloc_bitmap |
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On Thu, May 25, 2017 at 12:18:02PM -0700, Vinnie Magro wrote: > Replace alloc_bitmap with call to kvzalloc. kvzalloc preserves the > same fallback heuristic.
Looks good, thanks.
Reviewed-by: Omar Sandoval <osandov@fb.com>
> Signed-off-by: Vinnie Magro <vmagro@fb.com> > --- > fs/btrfs/free-space-tree.c | 23 ++--------------------- > 1 file changed, 2 insertions(+), 21 deletions(-) > > diff --git a/fs/btrfs/free-space-tree.c b/fs/btrfs/free-space-tree.c > index fc0bd84..9e87129 100644 > --- a/fs/btrfs/free-space-tree.c > +++ b/fs/btrfs/free-space-tree.c > @@ -151,25 +151,6 @@ static inline u32 free_space_bitmap_size(u64 size, u32 sectorsize) > return DIV_ROUND_UP((u32)div_u64(size, sectorsize), BITS_PER_BYTE); > } > > -static u8 *alloc_bitmap(u32 bitmap_size) > -{ > - void *mem; > - > - /* > - * The allocation size varies, observed numbers were < 4K up to 16K. > - * Using vmalloc unconditionally would be too heavy, we'll try > - * contiguous allocations first. > - */ > - if (bitmap_size <= PAGE_SIZE) > - return kzalloc(bitmap_size, GFP_NOFS); > - > - mem = kzalloc(bitmap_size, GFP_NOFS | __GFP_NOWARN); > - if (mem) > - return mem; > - > - return __vmalloc(bitmap_size, GFP_NOFS | __GFP_ZERO, PAGE_KERNEL); > -} > - > int convert_free_space_to_bitmaps(struct btrfs_trans_handle *trans, > struct btrfs_fs_info *fs_info, > struct btrfs_block_group_cache *block_group, > @@ -189,7 +170,7 @@ int convert_free_space_to_bitmaps(struct btrfs_trans_handle *trans, > > bitmap_size = free_space_bitmap_size(block_group->key.offset, > fs_info->sectorsize); > - bitmap = alloc_bitmap(bitmap_size); > + bitmap = kvzalloc(bitmap_size, GFP_NOFS); > if (!bitmap) { > ret = -ENOMEM; > goto out; > @@ -330,7 +311,7 @@ int convert_free_space_to_extents(struct btrfs_trans_handle *trans, > > bitmap_size = free_space_bitmap_size(block_group->key.offset, > fs_info->sectorsize); > - bitmap = alloc_bitmap(bitmap_size); > + bitmap = kvzalloc(bitmap_size, GFP_NOFS); > if (!bitmap) { > ret = -ENOMEM; > goto out; > -- > 2.9.3 > > -- > To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html
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