From 489fa45581ffce3adf970ac0c0f08391acc3d631 Mon Sep 17 00:00:00 2001 From: "Darrick J. Wong" Date: Fri, 25 Sep 2020 17:39:50 -0700 Subject: xfs: xfs_defer_capture should absorb remaining transaction reservation 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 Reviewed-by: Brian Foster --- 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(-) diff --git a/fs/xfs/libxfs/xfs_defer.c b/fs/xfs/libxfs/xfs_defer.c index 10aeae7353ab..e19dc1ced7e6 100644 --- a/fs/xfs/libxfs/xfs_defer.c +++ b/fs/xfs/libxfs/xfs_defer.c @@ -579,6 +579,9 @@ 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; } diff --git a/fs/xfs/libxfs/xfs_defer.h b/fs/xfs/libxfs/xfs_defer.h index 5c0e59b69ffa..6cde6f0713f7 100644 --- a/fs/xfs/libxfs/xfs_defer.h +++ b/fs/xfs/libxfs/xfs_defer.h @@ -79,6 +79,9 @@ 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; }; /* diff --git a/fs/xfs/xfs_log_recover.c b/fs/xfs/xfs_log_recover.c index 1be5208e2a2f..001e1585ddc6 100644 --- a/fs/xfs/xfs_log_recover.c +++ b/fs/xfs/xfs_log_recover.c @@ -2442,9 +2442,20 @@ 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; -- cgit v1.2.3