From owner-freebsd-bugs@freebsd.org Wed Mar 16 18:55:59 2016 Return-Path: Delivered-To: freebsd-bugs@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id 65B20AD36B4 for ; Wed, 16 Mar 2016 18:55:59 +0000 (UTC) (envelope-from robert.ayrapetyan@gmail.com) Received: from mail-ig0-x22e.google.com (mail-ig0-x22e.google.com [IPv6:2607:f8b0:4001:c05::22e]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (Client CN "smtp.gmail.com", Issuer "Google Internet Authority G2" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 3287210CE for ; Wed, 16 Mar 2016 18:55:59 +0000 (UTC) (envelope-from robert.ayrapetyan@gmail.com) Received: by mail-ig0-x22e.google.com with SMTP id mh10so51945862igb.0 for ; Wed, 16 Mar 2016 11:55:59 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:date:message-id:subject:from:to; bh=FX+kpq43ucUYhbkjXP/V735nx/SFBMmIC/V7I4NFmxY=; b=CdIpsq20CJgmCx8QwzE+F+PW5MxKo/EGdw3ZrRaWjwB4zr8slJuBhXtDfeissHTWrB mVAIBLbQw/5HgBTEug4Rzyg68ZPPfaauDPf2yYR5k0tecflCfZFB8355U9XIp/OiVNxL jjOE7OeXmn5AY/2ppAeqJRgm+ysD1DVx34x+LRBCmgXIwPXoz54B8myPOOFCyP9DHGhm mpFvyzrWRe7cWZ4x6eaqMQfUDjpLOlVhONBH8sO14comr6+KF6X7u8Y5D4RcF+/j/fAB /jEpNZrZ0pOE1tUs2+/6APL2+2kdE4UVdWnqYwUYcBLWjFHsYTjftXeBvq3JzDNcUXUW qjxg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:mime-version:date:message-id:subject:from:to; bh=FX+kpq43ucUYhbkjXP/V735nx/SFBMmIC/V7I4NFmxY=; b=dovl3Pzeoe+e9YzT5AmOJCzUtNptgR2dyKY+dTgPEK1BaN/yFgVJ2zwq2nk0vejS5t bGjxR7JpAg/P7iF8r6cJDSWIVNIzaIzJaprvpvx2CZyz18lMm4B/obbgzj2R74DyM5aZ pQPyMpb0+qXsJ5rMuSaYyL8FlbaSPLMhe00lv5+A018KuL1nk5rWpbv4m2egEEnaT45f 9QYsMtY8hJHT8Wf/9IjhlS7zQ4IlX1aPJtKbuGC0E0+WkcPYs7zW/TilS0Ov5QCek/CJ +IGNysItc9amtgtAPFehVdo9UTDv8W6nFm4MTHRWtleU5j3LtPXtsScOCOvNv5J5aDE9 ABpQ== X-Gm-Message-State: AD7BkJJFYaO5sxQRsVy6aZg+44yjrbTAygr45BWQbwTsmCL/IMLvzEoicahqizC6pxPp/LuQj3S0DuqOQg6PRw== MIME-Version: 1.0 X-Received: by 10.50.1.6 with SMTP id 6mr7410308igi.28.1458154558451; Wed, 16 Mar 2016 11:55:58 -0700 (PDT) Received: by 10.107.17.66 with HTTP; Wed, 16 Mar 2016 11:55:58 -0700 (PDT) Date: Wed, 16 Mar 2016 11:55:58 -0700 Message-ID: Subject: process freezes in STOP state and can't be killed From: Robert Ayrapetyan To: freebsd-bugs@freebsd.org Content-Type: text/plain; charset=UTF-8 X-Content-Filtered-By: Mailman/MimeDel 2.1.21 X-BeenThere: freebsd-bugs@freebsd.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: Bug reports List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 16 Mar 2016 18:55:59 -0000 Hello! I've started to observe a very strange behavior on my desktop PC (never seen anything like that using FreeBSD as a desktop OS for more than 5 years). Two things changed since I've started to observe problems: 1. A new PC (HP Z440) setup 2. Updated OS (FreeBSD 10.2) At some moment some process freezes and can't be killed\removed. So far this happened with firefox, thunderbird and virtualbox. Only OS restart helps to remove such process from a list. It's really annoying to have e.g. multiple firefox tabs in the panel which are dead. Details are given below: >uname -a FreeBSD work-pc 10.2-RELEASE-p9 FreeBSD 10.2-RELEASE-p9 #0: Thu Jan 14 01:32:46 UTC 2016 root@amd64-builder.daemonology.net:/usr/obj/usr/src/sys/GENERIC amd64 >ps aux | grep firefox robert 1022 0.0 4.1 1102920 676568 v0 T Mon03PM 101:01.17 firefox -profile /portable/firefox/robert pkill CONT 1022 pkill KILL 1022 produces no effect. There are no new messages in /var/log/messages. More hardcore info (stacks for 2 threads behind STOPped process 1022) (kgdb) thread 337 [Switching to thread 337 (Thread 100281)]#0 sched_switch ( td=0xfffff800b429d000, newtd=, flags=) at /usr/src/sys/kern/sched_ule.c:1945 1945 cpuid = PCPU_GET(cpuid); (kgdb) bt #0 sched_switch (td=0xfffff800b429d000, newtd=, flags=) at /usr/src/sys/kern/sched_ule.c:1945 #1 0xffffffff80952121 in mi_switch (flags=517, newtd=0x0) at /usr/src/sys/kern/kern_synch.c:491 #2 0xffffffff80990deb in sleepq_timedwait_sig (wchan=, pri=) at /usr/src/sys/kern/subr_sleepqueue.c:578 #3 0xffffffff80951af8 in _sleep (ident=0xfffff80011bd7400, lock=0xffffffff815c6ee0, priority=, wmesg=0xffffffff80fcb076 "uwait", sbt=, pr=, flags=) at /usr/src/sys/kern/kern_synch.c:249 #4 0xffffffff80966195 in umtxq_sleep (uq=0xfffff80011bd7400, wmesg=0xffffffff80fcb076 "uwait", abstime=0xfffffe0464912900) at /usr/src/sys/kern/kern_umtx.c:780 #5 0xffffffff80969007 in do_wait (td=, addr=, id=, timeout=, compat32=, is_private=) at /usr/src/sys/kern/kern_umtx.c:1247 #6 0xffffffff8096d473 in __umtx_op_wait_uint_private ( td=, uap=) at /usr/src/sys/kern/kern_umtx.c:3494 #7 0xffffffff80d4b3e7 in amd64_syscall (td=0xfffff800b429d000, traced=0) at subr_syscall.c:134 ---Type to continue, or q to quit--- #8 0xffffffff80d30acb in Xfast_syscall () at /usr/src/sys/amd64/amd64/exception.S:396 #9 0x000000080119fe1c in ?? () Previous frame inner to this frame (corrupt stack?) (kgdb) thread 338 [Switching to thread 338 (Thread 100428)]#0 sched_switch ( td=0xfffff801108324a0, newtd=, flags=) at /usr/src/sys/kern/sched_ule.c:1945 1945 cpuid = PCPU_GET(cpuid); (kgdb) bt #0 sched_switch (td=0xfffff801108324a0, newtd=, flags=) at /usr/src/sys/kern/sched_ule.c:1945 #1 0xffffffff80952121 in mi_switch (flags=266, newtd=0x0) at /usr/src/sys/kern/kern_synch.c:491 #2 0xffffffff80959e00 in thread_suspend_switch (td=0xfffff801108324a0, p=0xfffff800112a8000) at /usr/src/sys/kern/kern_thread.c:947 #3 0xffffffff809599f5 in thread_single (p=0xfffff800112a8000, mode=1) at /usr/src/sys/kern/kern_thread.c:740 #4 0xffffffff8090c75e in exit1 (td=0xfffff801108324a0, rv=15) at /usr/src/sys/kern/kern_exit.c:244 #5 0xffffffff8094bf85 in sigexit (td=0xfffff801108324a0, sig=15) at /usr/src/sys/kern/kern_sig.c:2974 #6 0xffffffff8094c826 in postsig (sig=) at /usr/src/sys/kern/kern_sig.c:2877 #7 0xffffffff809959c7 in ast (framep=) at /usr/src/sys/kern/subr_trap.c:281 #8 0xffffffff80d30b30 in Xfast_syscall () at /usr/src/sys/amd64/amd64/exception.S:421 #9 0x000000080146e64a in ?? ()