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On Thu, Sep 12, 2013 at 11:10 AM, <gottlieb@×××.edu> wrote: |
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> On Thu, Sep 12 2013, Stefan G. Weichinger wrote: |
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> |
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>> Am 12.09.2013 08:50, schrieb Mick: |
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>>> On Wednesday 11 Sep 2013 12:38:23 Stefan G. Weichinger wrote: |
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>>>> Am 11.09.2013 13:22, schrieb Stefan G. Weichinger: |
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>>>>> Failed to set a proper state for notification semaphore |
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>>>>> identified by cookie value |
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>>>> |
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>>>> Also found this: |
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>>>> |
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>>>> http://forums.gentoo.org/viewtopic-t-965446-view-previous.html?sid=5c1f845f |
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>>>> |
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>>>> |
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>> 96ca4cf1a9c17d73501e232d |
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>>>> |
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>>>> I have |
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>>>> |
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>>>> # zgrep UEV /proc/config.gz CONFIG_UEVENT_HELPER_PATH="" |
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>>>> CONFIG_DM_UEVENT=y |
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>>>> |
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>>>> so this is not my solution here ... |
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>>> |
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>>> I wonder if adding CONFIG_UEVENT_HELPER_PATH="/sbin/hotplug" would |
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>>> help you here. |
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>> |
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>> I don't have that binary. And some page on my way said the contrary: |
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>> set it to empty and let udev (?) do that. |
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> |
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> The wiki says to have it blank. I just started working with the |
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> systemd-wiki people and this is unsettled. Some are using |
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> /sbin/hotplug. I believe there is not much experience to go on. |
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> I will be trying to go to systemd with /sbin/hotplug. |
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|
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Do you even have /sbin/hotplug? I don't, in any of my machines, and I |
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don't even remember when was the last time I saw it. |
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|
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From the git live systemd README [1]: |
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|
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Legacy hotplug slows down the system and confuses udev: |
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CONFIG_UEVENT_HELPER_PATH="" |
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|
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From the kernel own help file: |
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|
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config UEVENT_HELPER_PATH |
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string "path to uevent helper" |
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default "" |
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help |
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Path to uevent helper program forked by the kernel for |
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every uevent. |
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|
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Before the switch to the netlink-based uevent source, this was |
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used to hook hotplug scripts into kernel device events. It |
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usually pointed to a shell script at /sbin/hotplug. |
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This should not be used today, because usual systems create |
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many events at bootup or device discovery in a very short time |
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frame. One forked process per event can create so many processes |
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that it creates a high system load, or on smaller systems |
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it is known to create out-of-memory situations during bootup. |
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|
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To disable user space helper program execution at early boot |
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time specify an empty string here. This setting can be altered |
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via /proc/sys/kernel/hotplug or via /sys/kernel/uevent_helper |
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later at runtime. |
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|
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Really, whomever is recommending to set CONFIG_UEVENT_HELPER_PATH is |
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probably wrong. I can't find *one* place where it is recommended, and |
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several where they explicitly say to leave the option in blank. |
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|
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Regards. |
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|
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[1] http://cgit.freedesktop.org/systemd/systemd/tree/README |
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-- |
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Canek Peláez Valdés |
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Posgrado en Ciencia e Ingeniería de la Computación |
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Universidad Nacional Autónoma de México |
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