Hello! I'm experiencing a strange issue, when using KDBUS, but I don't know how to properly report it and which info I should proide in addition to th one below.
In short, some userspace applications I'm using are freezing for about a minute or so, when thy trying to query system bus. Mostly it hurts me (in my daily workflow) when I trying to open some network resource with kde-open5 (or even target application), because KF5 seavily depends on DBUS. But some time ago I even experienced this with "sudo", and even when I tried to query system bus with qdbusviwer, it freezed too. It is pretty hard to trace entire KF5, but talking about issue with sudo, when I straced it, I saw frreze on the: > ppol(fd=9, ... syscall and when I looked in lsof, I noticed that fd9 is /sys/fs/kdbus/0-system/bus. KF5 things also freezing on sending queries to dbus, but I just can't get exactly application that freezing (although, if I just open http-links in konsole kpart in either yakuake, konsole or kdevelop — any of them also freezing on kdbus fd). To be honest, I'm not traced qdbusviewer, but I'm pretty sure it will show the same. When I recompiling kernel without KDBUS (or move the module somewhere, so that SystemD can't autoload it), all that userspace things starting to work like a charm, without a freezes and timeouts. When I enable KDBUS back (either as module or by compile it in the monolithic kernel), all the things reproduces again. I'm tried with both SystemD-216 and SystemD-226. P.S. I'll be happy to provide any additional info if you'll ask me. -- Best regards, mva -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
