diff options
Diffstat (limited to 'fs/xfs/xfs_iomap.c')
| -rw-r--r-- | fs/xfs/xfs_iomap.c | 40 |
1 files changed, 24 insertions, 16 deletions
diff --git a/fs/xfs/xfs_iomap.c b/fs/xfs/xfs_iomap.c index 7f537663365..364818eef40 100644 --- a/fs/xfs/xfs_iomap.c +++ b/fs/xfs/xfs_iomap.c @@ -41,6 +41,7 @@ #include "xfs_utils.h" #include "xfs_iomap.h" #include "xfs_trace.h" +#include "xfs_icache.h" #define XFS_WRITEIO_ALIGN(mp,off) (((off) >> mp->m_writeio_log) \ @@ -350,6 +351,15 @@ xfs_iomap_prealloc_size( } if (shift) alloc_blocks >>= shift; + + /* + * If we are still trying to allocate more space than is + * available, squash the prealloc hard. This can happen if we + * have a large file on a small filesystem and the above + * lowspace thresholds are smaller than MAXEXTLEN. + */ + while (alloc_blocks >= freesp) + alloc_blocks >>= 4; } if (alloc_blocks < mp->m_writeio_blocks) @@ -373,7 +383,7 @@ xfs_iomap_write_delay( xfs_extlen_t extsz; int nimaps; xfs_bmbt_irec_t imap[XFS_WRITE_IMAPS]; - int prealloc, flushed = 0; + int prealloc; int error; ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL)); @@ -434,31 +444,29 @@ retry: } /* - * If bmapi returned us nothing, we got either ENOSPC or EDQUOT. For - * ENOSPC, * flush all other inodes with delalloc blocks to free up - * some of the excess reserved metadata space. For both cases, retry + * If bmapi returned us nothing, we got either ENOSPC or EDQUOT. Retry * without EOF preallocation. */ if (nimaps == 0) { trace_xfs_delalloc_enospc(ip, offset, count); - if (flushed) - return XFS_ERROR(error ? error : ENOSPC); - - if (error == ENOSPC) { - xfs_iunlock(ip, XFS_ILOCK_EXCL); - xfs_flush_inodes(ip); - xfs_ilock(ip, XFS_ILOCK_EXCL); + if (prealloc) { + prealloc = 0; + error = 0; + goto retry; } - - flushed = 1; - error = 0; - prealloc = 0; - goto retry; + return XFS_ERROR(error ? error : ENOSPC); } if (!(imap[0].br_startblock || XFS_IS_REALTIME_INODE(ip))) return xfs_alert_fsblock_zero(ip, &imap[0]); + /* + * Tag the inode as speculatively preallocated so we can reclaim this + * space on demand, if necessary. + */ + if (prealloc) + xfs_inode_set_eofblocks_tag(ip); + *ret_imap = imap[0]; return 0; } |