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| author | Alexander Motin <mav@FreeBSD.org> | 2022-01-28 19:22:41 +0000 |
|---|---|---|
| committer | Alexander Motin <mav@FreeBSD.org> | 2022-01-28 19:22:41 +0000 |
| commit | 29998bf2ac4cc3ac49827336655bdbcb755eeffc (patch) | |
| tree | 2c91a4690a271118b18020737ff0fae90c208742 | |
| parent | ffc1cc95e78ec05a3e1a0aed869e33a44d9f6641 (diff) | |
| download | src-29998bf2ac4cc3ac49827336655bdbcb755eeffc.tar.gz src-29998bf2ac4cc3ac49827336655bdbcb755eeffc.zip | |
glabel: Set G_CF_DIRECT_SEND/RECEIVE for taste consumer.
All I/O requests through the taste consumer are synchronous, done
with g_read_data() and without any locks held. It makes no sense
to delegate the I/O to g_down/g_up threads.
This removes many of context switches during disk retaste.
MFC after: 2 weeks
| -rw-r--r-- | sys/geom/label/g_label.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/sys/geom/label/g_label.c b/sys/geom/label/g_label.c index 1df7e799b014..2244931cd19b 100644 --- a/sys/geom/label/g_label.c +++ b/sys/geom/label/g_label.c @@ -402,6 +402,7 @@ g_label_taste(struct g_class *mp, struct g_provider *pp, int flags __unused) gp->access = g_label_access_taste; gp->orphan = g_label_orphan_taste; cp = g_new_consumer(gp); + cp->flags |= G_CF_DIRECT_SEND | G_CF_DIRECT_RECEIVE; if (g_attach(cp, pp) != 0) goto end2; if (g_access(cp, 1, 0, 0) != 0) |