From: "Darrick J. Wong" darrick.wong@oracle.com
commit 929b92f64048d90d23e40a59c47adf59f5026903 upstream.
When xfs_defer_capture extracts the deferred ops and transaction state from a transaction, it should record the transaction reservation type from the old transaction so that when we continue the dfops chain, we still use the same reservation parameters.
Doing this means that the log item recovery functions get to determine the transaction reservation instead of abusing tr_itruncate in yet another part of xfs.
Signed-off-by: Darrick J. Wong darrick.wong@oracle.com Reviewed-by: Brian Foster bfoster@redhat.com Reviewed-by: Christoph Hellwig hch@lst.de Signed-off-by: Chandan Babu R chandan.babu@oracle.com Acked-by: Darrick J. Wong djwong@kernel.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- fs/xfs/libxfs/xfs_defer.c | 3 +++ fs/xfs/libxfs/xfs_defer.h | 3 +++ fs/xfs/xfs_log_recover.c | 17 ++++++++++++++--- 3 files changed, 20 insertions(+), 3 deletions(-)
--- a/fs/xfs/libxfs/xfs_defer.c +++ b/fs/xfs/libxfs/xfs_defer.c @@ -593,6 +593,9 @@ xfs_defer_ops_capture( dfc->dfc_blkres = tp->t_blk_res - tp->t_blk_res_used; dfc->dfc_rtxres = tp->t_rtx_res - tp->t_rtx_res_used;
+ /* Preserve the log reservation size. */ + dfc->dfc_logres = tp->t_log_res; + return dfc; }
--- a/fs/xfs/libxfs/xfs_defer.h +++ b/fs/xfs/libxfs/xfs_defer.h @@ -77,6 +77,9 @@ struct xfs_defer_capture { /* Block reservations for the data and rt devices. */ unsigned int dfc_blkres; unsigned int dfc_rtxres; + + /* Log reservation saved from the transaction. */ + unsigned int dfc_logres; };
/* --- a/fs/xfs/xfs_log_recover.c +++ b/fs/xfs/xfs_log_recover.c @@ -4769,9 +4769,20 @@ xlog_finish_defer_ops( int error = 0;
list_for_each_entry_safe(dfc, next, capture_list, dfc_list) { - error = xfs_trans_alloc(mp, &M_RES(mp)->tr_itruncate, - dfc->dfc_blkres, dfc->dfc_rtxres, - XFS_TRANS_RESERVE, &tp); + struct xfs_trans_res resv; + + /* + * Create a new transaction reservation from the captured + * information. Set logcount to 1 to force the new transaction + * to regrant every roll so that we can make forward progress + * in recovery no matter how full the log might be. + */ + resv.tr_logres = dfc->dfc_logres; + resv.tr_logcount = 1; + resv.tr_logflags = XFS_TRANS_PERM_LOG_RES; + + error = xfs_trans_alloc(mp, &resv, dfc->dfc_blkres, + dfc->dfc_rtxres, XFS_TRANS_RESERVE, &tp); if (error) return error;