diff options
| -rw-r--r-- | fs/xfs/libxfs/xfs_bmap.c | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/fs/xfs/libxfs/xfs_bmap.c b/fs/xfs/libxfs/xfs_bmap.c index cad21fd0c45d..daae00ed30c5 100644 --- a/fs/xfs/libxfs/xfs_bmap.c +++ b/fs/xfs/libxfs/xfs_bmap.c @@ -3390,6 +3390,8 @@ xfs_bmap_btalloc( xfs_agnumber_t fb_agno; /* ag number of ap->firstblock */ xfs_agnumber_t ag; xfs_alloc_arg_t args; + xfs_fileoff_t orig_offset; + xfs_extlen_t orig_length; xfs_extlen_t blen; xfs_extlen_t nextminlen = 0; int nullfb; /* true if ap->firstblock isn't set */ @@ -3399,6 +3401,8 @@ xfs_bmap_btalloc( int stripe_align; ASSERT(ap->length); + orig_offset = ap->offset; + orig_length = ap->length; mp = ap->ip->i_mount; @@ -3614,6 +3618,22 @@ xfs_bmap_btalloc( *ap->firstblock = args.fsbno; ASSERT(nullfb || fb_agno <= args.agno); ap->length = args.len; + /* + * If the extent size hint is active, we tried to round the + * caller's allocation request offset down to extsz and the + * length up to another extsz boundary. If we found a free + * extent we mapped it in starting at this new offset. If the + * newly mapped space isn't long enough to cover any of the + * range of offsets that was originally requested, move the + * mapping up so that we can fill as much of the caller's + * original request as possible. Free space is apparently + * very fragmented so we're unlikely to be able to satisfy the + * hints anyway. + */ + if (ap->length <= orig_length) + ap->offset = orig_offset; + else if (ap->offset + ap->length < orig_offset + orig_length) + ap->offset = orig_offset + orig_length - ap->length; xfs_bmap_btalloc_accounting(ap, &args); } else { ap->blkno = NULLFSBLOCK; |