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Read all disk labels concurrently in vdev_label_read_config 

This is similar to what we already do in vdev_geom_read_config.

Sponsored by: Axcient
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Alan Somers <asomers@gmail.com>
Closes #11470
This commit is contained in:
Alan Somers 2021-01-12 14:59:56 -07:00 committed by Brian Behlendorf
parent a0e01997ec
commit 67874d5487
1 changed files with 21 additions and 14 deletions
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35
module/zfs/vdev_label.c
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@ -754,9 +754,9 @@ vdev_label_read_config(vdev_t *vd, uint64_t txg)
{
spa_t *spa = vd->vdev_spa;
nvlist_t *config = NULL;
vdev_phys_t *vp;
abd_t *vp_abd;
zio_t *zio;
vdev_phys_t *vp[VDEV_LABELS];
abd_t *vp_abd[VDEV_LABELS];
zio_t *zio[VDEV_LABELS];
uint64_t best_txg = 0;
uint64_t label_txg = 0;
int error = 0;
@ -776,21 +776,24 @@ vdev_label_read_config(vdev_t *vd, uint64_t txg)
if (vd->vdev_ops == &vdev_draid_spare_ops)
return (vdev_draid_read_config_spare(vd));
vp_abd = abd_alloc_linear(sizeof (vdev_phys_t), B_TRUE);
vp = abd_to_buf(vp_abd);
for (int l = 0; l < VDEV_LABELS; l++) {
vp_abd[l] = abd_alloc_linear(sizeof (vdev_phys_t), B_TRUE);
vp[l] = abd_to_buf(vp_abd[l]);
}
retry:
for (int l = 0; l < VDEV_LABELS; l++) {
zio[l] = zio_root(spa, NULL, NULL, flags);
vdev_label_read(zio[l], vd, l, vp_abd[l],
offsetof(vdev_label_t, vl_vdev_phys), sizeof (vdev_phys_t),
NULL, NULL, flags);
}
for (int l = 0; l < VDEV_LABELS; l++) {
nvlist_t *label = NULL;
zio = zio_root(spa, NULL, NULL, flags);
vdev_label_read(zio, vd, l, vp_abd,
offsetof(vdev_label_t, vl_vdev_phys),
sizeof (vdev_phys_t), NULL, NULL, flags);
if (zio_wait(zio) == 0 &&
nvlist_unpack(vp->vp_nvlist, sizeof (vp->vp_nvlist),
if (zio_wait(zio[l]) == 0 &&
nvlist_unpack(vp[l]->vp_nvlist, sizeof (vp[l]->vp_nvlist),
&label, 0) == 0) {
/*
* Auxiliary vdevs won't have txg values in their
@ -803,6 +806,8 @@ retry:
ZPOOL_CONFIG_POOL_TXG, &label_txg);
if ((error || label_txg == 0) && !config) {
config = label;
for (l++; l < VDEV_LABELS; l++)
zio_wait(zio[l]);
break;
} else if (label_txg <= txg && label_txg > best_txg) {
best_txg = label_txg;
@ -831,7 +836,9 @@ retry:
(u_longlong_t)txg);
}
abd_free(vp_abd);
for (int l = 0; l < VDEV_LABELS; l++) {
abd_free(vp_abd[l]);
}
return (config);
}