From mboxrd@z Thu Jan 1 00:00:00 1970 From: Piotr Szymaniak Subject: Re: Strange "flush" process bahaviour Date: Fri, 29 Mar 2013 08:42:49 +0100 Message-ID: <20130329074249.GL1672@wloczykij> References: <50A65588.3000205@li.ru> <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> Mime-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha256; protocol="application/pgp-signature"; boundary="aWauiwyUFlp3+edf" Return-path: Content-Disposition: inline In-Reply-To: Sender: linux-nilfs-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org List-ID: To: Vyacheslav Dubeyko Cc: linux-nilfs-u79uwXL29TY76Z2rM5mHXA@public.gmane.org --aWauiwyUFlp3+edf Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Thu, Mar 28, 2013 at 10:22:52PM +0300, Vyacheslav Dubeyko wrote: > Thank you for additional details. Unfortunately, your sysrq-trigger > output is not complete. So, I can't make conclusion about what > operation was a reason of issue on your side. Could you send to me the > full log of sysrq-trigger output? How to generete more verbose log? 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 [flush-8= :0] And an uptime: 08:25:18 up 39 days, 10:57, 4 users, load average: 0.72, 0.89, 0.98 Also I don't know if this isn't some kind of regression. I'm using nilfs for, well, some time now (looking at fs creation date Aug 2011) and didn't noticed any strange behaviour before. I think I won't be able to check this, but before that last boot I used (95% sure) vanilla kernel 3.4.4 and it was not flushing things or I didn't noticed. I could go to some older LTS kernel on other machine and check that. > 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. 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. (: Piotr Szymaniak. --=20 Og=C3=B3lnie rzecz bior=C4=85c, chodzi o r=C3=B3=C5=BCnice w obj=C4=99to= =C5=9Bci i spiczasto=C5=9Bci. Kiedy ogl=C4=85dam zdj=C4=99cia w "National Geographic", widz=C4=99, =C5= =BCe cycki kobiet niewiele si=C4=99 r=C3=B3=C5=BCni=C4=85 od tego, co ma koza czy krowa - t= yle =C5=BCe s=C4=85 troch=C4=99 bardziej niewygodne. -- William Wharton, "Birdy" --aWauiwyUFlp3+edf Content-Type: application/pgp-signature; name="signature.asc" Content-Description: Digital signature -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.19 (GNU/Linux) iQIcBAEBCAAGBQJRVUX4AAoJEEMpAov1cw9lr2cQAJztjYjZ97AFP743mPLZchvv QAiXckrCCg0iaQ4dHVwZI6jgI7fZ4RWNtw1lkUm7Fq6vvMkZb5A7rX7xKkUT7iY8 KJQ3lubHgcJUaDfBiTxXGq7anOjOKcJb3HXkvZxC3HfyQihe1OjmALQectTG3FUx 7Jt0rJI0JovReKNOB19pbmoMVe0xdqfhm1aUQoCWL9B1TREtiQLIwLoj3+apdV0c qLLKv6hVsl6G3nB6+fV9ZgDA04P1ohKNsFDHruDn5eVgATXMyqVjiBA2hB9XEM65 W2hXHNS+W7G6N4eKyOhOvsABs4z51RqAbc3TW1g0TeHuV54o/JLJ86HWqBph+exW cHmGXzBScY5KMEnbjEUjfMS94go+pScWNqlfn6YWNpP6Uj4pODoJv+PBHw1pQB2t 49AKHeEFjtFaZFkbRE7AcuiFROkJ+q7n797qbwAFogHZlQjHEyFcHI0yFxromKHE cjC9MexcWDLNku7dacpVs2oM8nujzmWS+7IQGimWOs1kXCVp6zXgTXRSlsftTZs3 QWENuyGFrZhvxtlF7cXkEXh712vC2gsST9EW34Dh7x7TivPNiagkFtQnoEQEhb84 VIZo2NjdyRBDNkZFO+b1DGj8PwyQu7rmZwoJat8LSmR3eTqotPjPP/EM4TlZjNC+ vTXhGy+4rbRHysDaDA9J =5aEm -----END PGP SIGNATURE----- --aWauiwyUFlp3+edf-- -- 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