From mboxrd@z Thu Jan 1 00:00:00 1970 From: Edward Shishkin Subject: Re: IO randomly blocked for >1 minute while disk writes still in 2.6.16.1 + 2.6.16-reiser4-1 Date: Thu, 30 Mar 2006 16:41:40 +0400 Message-ID: <442BD204.4030402@namesys.com> References: <20060330023909.GA7547@rvalles.homedns.org.> Mime-Version: 1.0 Content-Type: multipart/mixed; boundary="------------040407060502080307070601" Return-path: list-help: list-unsubscribe: list-post: Errors-To: flx@namesys.com In-Reply-To: <20060330023909.GA7547@rvalles.homedns.org.> List-Id: To: rvalles Cc: reiserfs-list@namesys.com --------------040407060502080307070601 Content-Type: text/plain; charset="iso-8859-1"; format="flowed" Content-Transfer-Encoding: quoted-printable rvalles wrote: >A few months ago I posted about a problem I was having with kernels >newer than 2.6.12.x, where, apparently randomly, sometimes vim or other >programs would be blocked for more than a minute, and during the entire >blockage, the disk would appear to be writing data. > >Since I saw talk on the matter, I thought it would be the mmap/fsync >performance problem or something like that, and after so much time it >would be fixed already, but apparently it isn't yet, which I discovered >after building a 2.6.16.1 with the 2.6.16-reiser4-1 patch available on >the namesys ftp server. > >Soon after booting my desktop system and starting X, xfce, etc. I >started to wget the latest knoppix ISO and then started to play a movie >with mplayer. The movie is an avi ffmpeg + mp3 at about 1mbit/s overall. >The described blockings happened again and again during the reproduction >of the movie. Now, just to know the format, I played it again, and as it >began, it blocked again... not even knoppix is downloading on the >background. > >I got knoppix so that I could boot it, get last reiser4tools and run a >fsck --fix on my reiser4 partition. Since now I've already done that, I >don't think it helped much. > >I attach my kernel config file. I'll be very happy to provide any other >debug information if it's needed, or to test patches and see if they fix >the problem. For now, I'll fall back to 2.6.12.6, which is the latest >kernel I can use which doesn't have the problem. > >Sincerelly, >Roc Vall=E8s > =20 > Hello. Would you please try the attached patch against=20 2.6.16.1+reiser4-for-2.6.16-1 Edward. --------------040407060502080307070601--