diff options
Diffstat (limited to 'fs/xfs/xfs_rtalloc.c')
| -rw-r--r-- | fs/xfs/xfs_rtalloc.c | 27 |
1 files changed, 22 insertions, 5 deletions
diff --git a/fs/xfs/xfs_rtalloc.c b/fs/xfs/xfs_rtalloc.c index b743da885ed6..ba66442910b1 100644 --- a/fs/xfs/xfs_rtalloc.c +++ b/fs/xfs/xfs_rtalloc.c @@ -527,13 +527,30 @@ xfs_rtallocate_extent_near( * On the negative side of the starting location. */ else { /* i < 0 */ + int maxblocks; + + /* + * Loop backwards to find the end of the extent + * we found in the realtime summary. + * + * maxblocks is the maximum possible number of + * bitmap blocks from the start of the extent + * to the end of the extent. + */ + if (maxlog == 0) + maxblocks = 0; + else if (maxlog < mp->m_blkbit_log) + maxblocks = 1; + else + maxblocks = 2 << (maxlog - mp->m_blkbit_log); + /* - * Loop backwards through the bitmap blocks - * from where we last checked down to where we - * are now. There should be an extent which - * ends in this bitmap block and is long - * enough. + * We need to check bbno + i + maxblocks down to + * bbno + i. We already checked bbno down to + * bbno + j + 1, so we don't need to check those + * again. */ + j = min(i + maxblocks, j); for (; j >= i; j--) { error = xfs_rtallocate_extent_block(args, bbno + j, minlen, |