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autofs-5.0.7 - don't schedule new alarms after readmap
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From: Leonardo Chiquitto <leonardo.lists@gmail.com>
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Currently, a new alarm is scheduled every time the daemon receives
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a SIGHUP (map re-read) or SIGUSR1 (forced expiration). Besides that,
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map re-reads started on demand when a map is found to be outdated
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also generate a new alarm.
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Once added, these alarms are never deleted and hence increase the
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number of times the daemon wakes up to run the expiration procedure.
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After a couple of months, in setups with many mount points, it's
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normal to see automount waking up every second to handle the
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expiration timer.
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This patch removes the alarm scheduling from the readmap cleanup
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routine and makes sure the alarm is re-added after the expiration
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process only when it was not triggered by SIGUSR1.
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I couldn't think of any use case to justify keeping these alarms:
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it's critical to have the alarm ticking every timeout/4 seconds,
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but more than one periodic alarm running doesn't seem to make
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sense.
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---
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CHANGELOG | 1 +
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daemon/state.c | 6 +-----
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2 files changed, 2 insertions(+), 5 deletions(-)
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diff --git a/CHANGELOG b/CHANGELOG
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index c9be73e..4cf5621 100644
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--- a/CHANGELOG
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+++ b/CHANGELOG
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@@ -22,6 +22,7 @@
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- fix init script status return.
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- fix use get_proximity() without libtirpc.
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- don't use dirent d_type to filter out files in scandir()
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+- don't schedule new alarms after readmap.
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25/07/2012 autofs-5.0.7
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=======================
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diff --git a/daemon/state.c b/daemon/state.c
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index b451c56..6e23022 100644
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--- a/daemon/state.c
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+++ b/daemon/state.c
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@@ -144,7 +144,7 @@ void expire_cleanup(void *arg)
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ap->submount = 2;
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}
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- if (!ap->submount)
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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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/* FALLTHROUGH */
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@@ -330,13 +330,9 @@ static void do_readmap_cleanup(void *arg)
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ap = ra->ap;
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st_mutex_lock();
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-
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ap->readmap_thread = 0;
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st_set_done(ap);
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- if (!ap->submount)
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- alarm_add(ap, ap->exp_runfreq);
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st_ready(ap);
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-
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st_mutex_unlock();
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free(ra);
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