From: Dave Chinner <david@fromorbit.com>
To: Brian Foster <bfoster@redhat.com>
Cc: xfs@oss.sgi.com
Subject: Re: [PATCH 05/18] xfs: create macros/helpers for dealing with sparse inode chunks
Date: Fri, 25 Jul 2014 08:13:41 +1000 [thread overview]
Message-ID: <20140724221341.GO20518@dastard> (raw)
In-Reply-To: <1406211788-63206-6-git-send-email-bfoster@redhat.com>
On Thu, Jul 24, 2014 at 10:22:55AM -0400, Brian Foster wrote:
> Sparse inode chunks allow the traditional inode btree record format to
> describe an inode chunk that is not fully allocated and/or contiguous.
> Define a couple constants that set requirements for allocation and
> management of such chunks. Also define a helper to easily detect sparse
> inode chunks.
>
> The granularity of a sparse chunk is defined by the the 16-bit holemask
> field in the inode record. Assuming 64 inodes per full chunk, a single
> holemask bit accounts for 4 inodes. The minimum allocation requirement
> for a sparse inode chunk is defined as the minimum number of blocks
> required to meet the 4 inode granularity.
>
> Signed-off-by: Brian Foster <bfoster@redhat.com>
> ---
> fs/xfs/libxfs/xfs_format.h | 9 +++++++++
> 1 file changed, 9 insertions(+)
>
> diff --git a/fs/xfs/libxfs/xfs_format.h b/fs/xfs/libxfs/xfs_format.h
> index 39022d9..0baad50 100644
> --- a/fs/xfs/libxfs/xfs_format.h
> +++ b/fs/xfs/libxfs/xfs_format.h
> @@ -211,6 +211,11 @@ typedef __uint64_t xfs_inofree_t;
> #define XFS_INOBT_ALL_FREE ((xfs_inofree_t)-1)
> #define XFS_INOBT_MASK(i) ((xfs_inofree_t)1 << (i))
>
> +#define XFS_INODES_PER_SPCHUNK \
> + (XFS_INODES_PER_CHUNK / (NBBY * sizeof(__uint16_t)))
> +#define XFS_INOBT_MIN_SPCHUNKLEN(sb) \
> + (roundup(XFS_INODES_PER_SPCHUNK, sb.sb_inopblock) / sb.sb_inopblock)
static inline.
-Dave.
--
Dave Chinner
david@fromorbit.com
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next prev parent reply other threads:[~2014-07-24 22:13 UTC|newest]
Thread overview: 50+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-07-24 14:22 [PATCH RFC 00/18] xfs: sparse inode chunks Brian Foster
2014-07-24 14:22 ` [PATCH 01/18] xfs: refactor xfs_inobt_insert() to eliminate loop and support variable count Brian Foster
2014-07-24 22:10 ` Dave Chinner
2014-07-28 16:03 ` Brian Foster
2014-07-28 23:32 ` Dave Chinner
2014-07-29 14:43 ` Brian Foster
2014-07-24 14:22 ` [PATCH 02/18] xfs: pass xfs_mount directly to xfs_ialloc_cluster_alignment() Brian Foster
2014-07-24 14:22 ` [PATCH 03/18] xfs: define sparse inode chunks v5 sb feature bit and helper function Brian Foster
2014-07-24 17:08 ` Mark Tinguely
2014-07-24 17:37 ` Brian Foster
2014-07-24 18:38 ` Mark Tinguely
2014-07-24 19:38 ` Brian Foster
2014-07-24 23:35 ` Dave Chinner
2014-07-24 14:22 ` [PATCH 04/18] xfs: introduce inode record hole mask for sparse inode chunks Brian Foster
2014-07-24 22:14 ` Dave Chinner
2014-07-28 16:16 ` Brian Foster
2014-08-07 15:18 ` Brian Foster
2014-07-24 14:22 ` [PATCH 05/18] xfs: create macros/helpers for dealing with " Brian Foster
2014-07-24 22:13 ` Dave Chinner [this message]
2014-07-24 14:22 ` [PATCH 06/18] xfs: pass inode count through ordered icreate log item Brian Foster
2014-07-24 14:22 ` [PATCH 07/18] xfs: handle sparse inode chunks in icreate log recovery Brian Foster
2014-07-24 14:22 ` [PATCH 08/18] xfs: create helper to manage record overlap for sparse inode chunks Brian Foster
2014-07-24 22:41 ` Dave Chinner
2014-07-28 16:19 ` Brian Foster
2014-07-29 0:07 ` Dave Chinner
2014-07-29 15:10 ` Brian Foster
2014-07-24 14:22 ` [PATCH 09/18] xfs: allocate sparse inode chunks on full chunk allocation failure Brian Foster
2014-07-24 14:23 ` [PATCH 10/18] xfs: set sparse inodes feature bit when a sparse chunk is allocated Brian Foster
2014-07-24 22:46 ` Dave Chinner
2014-07-28 16:23 ` Brian Foster
2014-07-24 14:23 ` [PATCH 11/18] xfs: reduce min. inode allocation space requirement for sparse inode chunks Brian Foster
2014-07-24 22:50 ` Dave Chinner
2014-07-24 14:23 ` [PATCH 12/18] xfs: helper to convert inobt record holemask to inode alloc. bitmap Brian Foster
2014-07-24 23:21 ` Dave Chinner
2014-07-24 14:23 ` [PATCH 13/18] xfs: filter out sparse regions from individual inode allocation Brian Foster
2014-07-24 14:23 ` [PATCH 14/18] xfs: update free inode record logic to support sparse inode records Brian Foster
2014-07-24 14:23 ` [PATCH 15/18] xfs: only free allocated regions of inode chunks Brian Foster
2014-07-24 23:24 ` Dave Chinner
2014-07-24 14:23 ` [PATCH 16/18] xfs: skip unallocated regions of inode chunks in xfs_ifree_cluster() Brian Foster
2014-07-24 14:23 ` [PATCH 17/18] xfs: use actual inode count for sparse records in bulkstat/inumbers Brian Foster
2014-07-24 23:29 ` Dave Chinner
2014-07-24 14:23 ` [PATCH 18/18] xfs: enable sparse inode chunks for v5 superblocks Brian Foster
2014-07-24 23:34 ` Dave Chinner
2014-07-24 16:28 ` [PATCH RFC 00/18] xfs: sparse inode chunks Brian Foster
2014-07-24 22:32 ` Dave Chinner
2014-07-25 16:30 ` Brian Foster
2014-07-26 0:03 ` Dave Chinner
2014-07-28 12:14 ` Brian Foster
2014-07-29 0:26 ` Dave Chinner
2014-07-29 15:25 ` Brian Foster
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