From: Kay Sievers Date: Wed, 11 Jun 2014 10:00:47 +0000 (+0200) Subject: NEWS: add section about udev locking X-Git-Tag: v214~9 X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=elogind.git;a=commitdiff_plain;h=4196a3ead3cfb823670d225eefcb3e60e34c7d95 NEWS: add section about udev locking --- diff --git a/NEWS b/NEWS index 484f84d07..8a022bea7 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 diff --git a/configure.ac b/configure.ac index 3252e65c9..4ba0abf49 100644 --- a/configure.ac +++ b/configure.ac @@ -34,7 +34,7 @@ AC_USE_SYSTEM_EXTENSIONS AC_SYS_LARGEFILE AC_PREFIX_DEFAULT([/usr]) AM_MAINTAINER_MODE([enable]) -AM_INIT_AUTOMAKE([foreign 1.11 -Wall -Wno-portability silent-rules tar-pax no-dist-gzip dist-xz subdir-objects check-news]) +AM_INIT_AUTOMAKE([foreign 1.11 -Wall -Wno-portability silent-rules tar-pax no-dist-gzip dist-xz subdir-objects]) AM_SILENT_RULES([yes]) AC_CANONICAL_HOST AC_DEFINE_UNQUOTED([CANONICAL_HOST], "$host", [Canonical host string.])