diff options
Diffstat (limited to 'sys/contrib/openzfs/module/zfs/vdev_draid.c')
| -rw-r--r-- | sys/contrib/openzfs/module/zfs/vdev_draid.c | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/sys/contrib/openzfs/module/zfs/vdev_draid.c b/sys/contrib/openzfs/module/zfs/vdev_draid.c index a05289102af2..8588cfee3f7d 100644 --- a/sys/contrib/openzfs/module/zfs/vdev_draid.c +++ b/sys/contrib/openzfs/module/zfs/vdev_draid.c @@ -22,6 +22,7 @@ /* * Copyright (c) 2018 Intel Corporation. * Copyright (c) 2020 by Lawrence Livermore National Security, LLC. + * Copyright (c) 2025, Klara, Inc. */ #include <sys/zfs_context.h> @@ -1996,6 +1997,33 @@ vdev_draid_io_start_read(zio_t *zio, raidz_row_t *rr) rc->rc_allow_repair = 1; } } + + if (vdev_sit_out_reads(cvd, zio->io_flags)) { + rr->rr_outlier_cnt++; + ASSERT0(rc->rc_latency_outlier); + rc->rc_latency_outlier = 1; + } + } + + /* + * When the row contains a latency outlier and sufficient parity + * exists to reconstruct the column data, then skip reading the + * known slow child vdev as a performance optimization. + */ + if (rr->rr_outlier_cnt > 0 && + (rr->rr_firstdatacol - rr->rr_missingparity) >= + (rr->rr_missingdata + 1)) { + + for (int c = rr->rr_cols - 1; c >= rr->rr_firstdatacol; c--) { + raidz_col_t *rc = &rr->rr_col[c]; + + if (rc->rc_error == 0 && rc->rc_latency_outlier) { + rr->rr_missingdata++; + rc->rc_error = SET_ERROR(EAGAIN); + rc->rc_skipped = 1; + break; + } + } } /* |