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autofs-5.1.2 - delay submount exit for amd submounts
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From: Ian Kent <raven@themaw.net>
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For amd format maps it's better to not expire away submounts (amd
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type "auto" mounts) straight way.
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This is because of the common heavy reuse of maps in amd maps and
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we want to try and avoid constantly re-reading large maps.
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Signed-off-by: Ian Kent <raven@themaw.net>
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---
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CHANGELOG | 1 +
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daemon/state.c | 18 +++++++++++++++---
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2 files changed, 16 insertions(+), 3 deletions(-)
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--- autofs-5.0.7.orig/CHANGELOG
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+++ autofs-5.0.7/CHANGELOG
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@@ -234,6 +234,7 @@
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- handle map_option cache for top level mounts.
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- handle amd cache option all in amd type auto mounts.
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- fix bogus check in expire_cleanup().
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+- delay submount exit for amd submounts.
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25/07/2012 autofs-5.0.7
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=======================
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--- autofs-5.0.7.orig/daemon/state.c
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+++ autofs-5.0.7/daemon/state.c
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@@ -132,15 +132,27 @@ void expire_cleanup(void *arg)
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* mount expires in a reasonable time. Just skip
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* one expire check after it's no longer busy before
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* allowing it to shutdown.
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+ *
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+ * But if this mount point is an amd format map it
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+ * is better to keep the mount around longer. This
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+ * is because of the common heavy reuse of maps in
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+ * amd maps and we want to try and avoid constantly
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+ * re-reading large maps.
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*/
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if (ap->submount && !success) {
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rv = ops->askumount(ap->logopt, ap->ioctlfd, &idle);
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if (!rv && idle && ap->submount > 1) {
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- next = ST_SHUTDOWN_PENDING;
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- break;
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+ struct map_source *map = ap->entry->maps;
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+
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+ if (ap->submount > 4 ||
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+ !(map->flags & MAP_FLAG_FORMAT_AMD)) {
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+ next = ST_SHUTDOWN_PENDING;
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+ break;
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+ }
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}
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ap->submount++;
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- }
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+ } else if (ap->submount > 1)
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+ ap->submount = 1;
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if (ap->state == ST_EXPIRE && !ap->submount)
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alarm_add(ap, ap->exp_runfreq);
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