From mboxrd@z Thu Jan 1 00:00:00 1970 From: Piotr Szymaniak Subject: Re: Strange "flush" process bahaviour Date: Fri, 29 Mar 2013 11:37:10 +0100 Message-ID: <20130329103710.GM1672@wloczykij> References: <20121127151924.GW4028@wloczykij> <295B3FE7-A44E-4D57-9A6A-B725EF1BA9EB@dubeyko.com> <20121128142116.GY4028@wloczykij> <1354113560.2017.11.camel@slavad-ubuntu> <20121128205943.GZ4028@wloczykij> <1354172459.2077.11.camel@slavad-ubuntu> <20130328120700.GK1672@wloczykij> <20130329074249.GL1672@wloczykij> <1364544910.11128.9.camel@slavad-ubuntu> Mime-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha256; protocol="application/pgp-signature"; boundary="G23JYFG0d77Z6i/3" Return-path: Content-Disposition: inline In-Reply-To: <1364544910.11128.9.camel@slavad-ubuntu> Sender: linux-nilfs-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org List-ID: To: Vyacheslav Dubeyko Cc: linux-nilfs-u79uwXL29TY76Z2rM5mHXA@public.gmane.org --G23JYFG0d77Z6i/3 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Fri, Mar 29, 2013 at 12:15:10PM +0400, Vyacheslav Dubeyko wrote: > I meant that sysrq-trigger output ends with resume about runnable tasks > and locks in the system (for example): > *snip* > So, I need in full sysrq-trigger output for understanding situation on > your side. Could you share it? If this should be in echo t > /proc/sysrq-trigger then I shared full output already. Maybe I'm missing some (debug?) features in kernel for more verbose output. > > Btw looking at ps aux output it seems, that this flush is hanging there > > almost from first boot: > > root 937 88.2 0.0 0 0 ? S Feb17 50160:39 [flu= sh-8:0] > >=20 >=20 > Could you share "cat /proc/partitions" and "mount" outputs? I need to > understand what partition is processed by [flush-8:0]. ~ # cat /proc/partitions major minor #blocks name 8 0 3915776 sda 8 1 32768 sda1 8 2 65536 sda2 8 3 3816448 sda3 8 16 156290904 sdb 8 17 4200966 sdb1 8 18 273105 sdb2 8 19 146810002 sdb3 8 20 5004247 sdb4 254 0 65536 dm-0 254 1 146808974 dm-1 ~ # mount rootfs on / type rootfs (rw) /dev/sda3 on / type nilfs2 (rw,noatime,nodiratime,gcpid=3D16150) proc on /proc type proc (rw,nosuid,nodev,noexec,relatime) tmpfs on /run type tmpfs (rw,nosuid,nodev,relatime,mode=3D755) udev on /dev type devtmpfs (rw,nosuid,relatime,size=3D10240k,nr_inodes=3D22= 1714,mode=3D755) devpts on /dev/pts type devpts (rw,nosuid,noexec,relatime,gid=3D5,mode=3D62= 0) shm on /dev/shm type tmpfs (rw,nosuid,nodev,noexec,relatime) sysfs on /sys type sysfs (rw,nosuid,nodev,noexec,relatime) /dev/mapper/chome on /home type btrfs (rw,noatime) > > > I can easily reproduce the issue by big file (100 - 500 GB) deletion > > > or truncation. Please, find description in: > > > http://www.mail-archive.com/linux-nilfs-u79uwXL29TY76Z2rM5mHXA@public.gmane.org/msg01504.html. > >=20 > > If this brings something new - I'm not using huge files like that (this > > flush above is a 3.7G device). But if this reproduces the issue, it > > could be related. (: > >=20 >=20 > Yes, it is really important to understand the situation on your side. > Because you can have another reason of the issue with similar symptoms. > So, we need to investigate your case more deeply, I think. Got this issue on two different machines, but none of them uses nilfs2 at device bigger then 60G (in fact, the partitions are, afair, around 30G and = the mentioned 3.7G). Piotr Szymaniak. --=20 I ten smr=C3=B3d. Diabli wiedz=C4=85, co tam gni=C5=82o, w tym mi=C4=99siwi= e, ale Redowi wyda=C5=82o si=C4=99, =C5=BCe sto tysi=C4=99cy rozbitych cuchn=C4=85cych ja= j wylanych na sto tysi=C4=99cy cuchn=C4=85cych rybich =C5=82b=C3=B3w i zdech=C5=82ych kot=C3= =B3w nie mo=C5=BCe =C5=9Bmierdzie=C4=87 tak, jak =C5=9Bmierdzia=C5=82a ta ma=C5=BA. -- Arkadij i Borys Strugaccy, =E2=80=9EPiknik na skraju drogi=E2=80=9D --G23JYFG0d77Z6i/3 Content-Type: application/pgp-signature; name="signature.asc" Content-Description: Digital signature -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.19 (GNU/Linux) iQIcBAEBCAAGBQJRVW7VAAoJEEMpAov1cw9l32IP/R7O7mMQ4KQKZqVrpEVEv/cj 8zCzCXr+ggOfU7sNfL6tRY157NgInbegJ/gRymP+7cXbabWDVqEoWxtGLwbwPvn8 M7CWO/B5VHSzl0aMpdhjoO69el6k+QkQ2mzVXlv5jgkH79P5Zdi+gGcqIP0extpN aby/ndZG5mxkho/6q5vDFcvlET9NLiIyPNFmFWIlxYH8zz/3/d3pWmZ9F3DqeYSA 5FBik+A5shxrIcUXJUBu152/F0YivbhQMMYlv28p+xzaXIj5ikJXhoG1IWzGqee+ 53hVpzYlMWdS62ulbRQYMfvskH3gv+cOLxWufVRz4paABn+nvge+50E3x2vvpRGN l0i00zF3qP2bIy3G5SlA0Z/SsuEMw3ASPMfLRlQEuZZ45y7Cl20bdh4DCT9gFWTj Q8FZ+MFW7tfsy42+541dd4btWJXk0uICAFVFCAlcf8zlufDhfjesycnpzFW8NuGM VhSjtK70gH3TrMbbfAdpf8z0qH4J48wWoaTKqSi/xeS4xXDvokX1w/KqRl2bSgZF 9En2AsqQLAbauW7dtqqMX/E7Tzb1HmdF/x0z3Fdy4Nh70jYghfcTO4Y910Yg0axk ovi6W/IqgP2Wy+jC+WiLRExahSbu5+CnWaEo+xKnF8zRr6Xw5lhoH050+IzOdAHM MCJSDyvx2l4RxgAqko8K =CMrD -----END PGP SIGNATURE----- --G23JYFG0d77Z6i/3-- -- To unsubscribe from this list: send the line "unsubscribe linux-nilfs" in the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org More majordomo info at http://vger.kernel.org/majordomo-info.html