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udevd's event_queue_manager loop is pretty sensitive to the
delays of exiting child processes. I found that it helps boot
times if we try to reap children as quickly as possible.
This patch changes event_queue_manager to call sigchilds_waiting
if it finds a signal has been received.
Signed-off-by: Olaf Kirch <okir@suse.de>
In certain cut-down situations such as an installer or inside the
initramfs, we simply don't have any kind of name service. While we
could use rules without OWNER or GROUP, it's better to have the same
rules as a full system and have udevd ignore those parts of the rules.
Adds a --resolve-names=never switch to udevd that has this effect.
udevd uses a rather old-fashioned way of handling signals
while waiting for input through select (ie by using an unnamed
pipe, to which the signal handler writes one byte for every signal
received). This is rather awkward and may potentially even block
if we receive more signals than the kernel's pipe buffer.
This patch replaces all of that with ppoll, which was designed
for this purpose.
It also removes the SA_RESTART flag from all installed signal
handlers, because otherwise the ppoll call would just be restarted
after handling eg a SIGCHLD.
Signed-off-by: Olaf Kirch <okir@suse.de>
Picked up by "gcc -Wextra".
udevadm.c:83: warning: initialized field overwritten
udevadm.c:83: warning: (near initialization for ‘cmds[2].help’)
This is just a cleanup. It doesn't change the code generated by gcc.
Scott found that the node /dev/pktcdvd can not be replaced by
/dev/pktcdvd/control by changing the rules, and re-trigger the
event. We used to create the new names before we cleaned up the
old ones, which can not work if we need to create subdir with
the same name.
Since a while we change the database with a "test" run, but do not update
the node and symlinks. We need to "force" all the time, to keep things
in sync.
$env{ID_PATH} includes the "-nst" suffix anyway, so we shouldn't append
it a second time as part of the rule creating the device file symlink.
Signed-off-by: Lennart Poettering <lennart@poettering.net>
On Fri, Dec 26, 2008 at 01:26, Karel Zak <kzak@redhat.com> wrote:
> On Fri, Dec 26, 2008 at 12:39:16AM +0100, Kay Sievers wrote:
>> On Fri, Dec 26, 2008 at 00:26, Karel Zak <kzak@redhat.com> wrote:
>> > The upstream raw(8) command supports /dev/rawctl and also
>> > /dev/raw/rawctl. I think it makes more sense to use raw/rawctl when
>> > you have all your raw devices in raw/ subdirectory (e.g. /dev/raw/raw<N>).
>>
>> The raw tool looks for /dev/rawctl first and the fallback to
>> /dev/raw/rawctl is named DEVFS_*. Should we turn that order around and
>> remove the devfs notion from the raw tool and let udev create a
>> dev/raw/rawctl node?
>
> Yeah. Fixed, committed and pushed.
>
> $ strace -e open ./raw
> open("/dev/raw/rawctl", O_RDWR) = -1 ENOENT (No such file or directory)
> open("/dev/rawctl", O_RDWR) = -1 ENOENT (No such file or directory)
>
> I have also removed the #ifdef OLD_RAW_DEVS (/dev/raw<N>) junk.
