From 4196a3ead3cfb823670d225eefcb3e60e34c7d95 Mon Sep 17 00:00:00 2001 From: Kay Sievers Date: Wed, 11 Jun 2014 12:00:47 +0200 Subject: NEWS: add section about udev locking --- NEWS | 17 +++++++++++++++++ 1 file changed, 17 insertions(+) (limited to 'NEWS') diff --git a/NEWS b/NEWS index 484f84d07c..8a022bea78 100644 --- a/NEWS +++ b/NEWS @@ -1,5 +1,22 @@ systemd System and Service Manager +CHANGES WITH 214: + + * As an experimental feature, udev now tries to lock the + disk device node (flock(LOCK_SH|LOCK_NB)) while it + executes events for the disk or any of its partitions. + Applications like partitioning programs can lock the + disk device node (flock(LOCK_EX)) and claim temporary + device ownership that way; udev will entirely skip all event + handling for this disk and its partitions. If the disk + was opened for writing, the close will trigger a partition + table rescan in udev's "watch" facility, and if needed + synthesize "change" events for the disk and all its partions. + This is now unconditionally enabled, if it turns out to + cause major problems, we might turn it on only for specific + devices, or might need to disable it entirely. Device-mapper + devices are excluded from this logic. + CHANGES WITH 213: * A new "systemd-timesyncd" daemon has been added for -- cgit v1.2.3-54-g00ecf