Re: reiser4 in 2.6.14 - lockups with mmapped files
Hello rvalles wrote: Still having the same problem, with 2.6.14.2 patched with 2.6.14-1 reiser4 patch. It's easy to trigger it while editing a file with vim, and it does take a hell of a long wait (while it hits the disk for a minute or so, sometimes) for it to unlock. I notice this behaviour some times. But it does not appear to happen very often. If you know the way to reproduce it on demand - would you please share your knowledge?
Re: reiser4 in 2.6.14 - lockups with mmapped files
rvalles napisał(a): Still having the same problem, with 2.6.14.2 patched with 2.6.14-1 reiser4 patch. It's easy to trigger it while editing a file with vim, and it does take a hell of a long wait (while it hits the disk for a minute or so, sometimes) for it to unlock. or if you try to run lilo... or dpkg/apt-get its also very easy to trigger it this way. it hangs my server from time to time ... is there any progress in fixing that?
Re: reiser4 in 2.6.14 - lockups with mmapped files
Still having the same problem, with 2.6.14.2 patched with 2.6.14-1 reiser4 patch. It's easy to trigger it while editing a file with vim, and it does take a hell of a long wait (while it hits the disk for a minute or so, sometimes) for it to unlock. pgpiVjhF6EPSl.pgp Description: PGP signature
Re: SOLVED: reiser4 in 2.6.14 - lockups with mmapped files
On Wed 9 Nov 2005 2:21, rvalles wrote: If you are refering to 2.6.14-arckck3, I tried it and it doesn't fix a thing. Even more, it triggers it more often, probably related to it's agressivity against cache (swap prefetch, less tendency to swap, etc.). I'm using 2.6.14-archck3. Could one of the symptoms be that apt/dpkg gets stuck if its files are on a Reiser4 partition? After installing 2.6.14-archck3 and rebooting I found that aptitude etc. didn't work any longer and I couldn't even kill the processes when they got stuck?! When I reformatted the repository's partition (/var/cache/apt) to ReiserFS the problem disappeared. The funny thing is that I don't experience problems with the rest of my Reiser4 partitions: /dev/mapper/system-tmp on /tmp type reiser4 (rw) /dev/mapper/system-squid on /var/spool/squid type reiser4 (rw) /dev/mapper/extra-music on /extra/music type reiser4 (rw) The apt repository looks like this now: /dev/mapper/system-cache on /var/cache type reiserfs (rw) For what it's worth, Ray
Re: SOLVED: reiser4 in 2.6.14 - lockups with mmapped files
On Fri, Nov 04, 2005 at 10:12:34PM +0100, Fionn Behrens wrote: it looks like any time any mmapped file is synced to a reiser4 partition, the process who tries to do that will freeze forever. The archck patch maintainer released an update which no longer exhibits the problem. After several hours of run time and some stress tests I didnt experience a problem so far. Fionn If you are refering to 2.6.14-arckck3, I tried it and it doesn't fix a thing. Even more, it triggers it more often, probably related to it's agressivity against cache (swap prefetch, less tendency to swap, etc.). I'm back with 2.6.12, waiting for a 2.6.14 patch I can work with. pgpqSQExw8XEE.pgp Description: PGP signature
Re: reiser4 in 2.6.14 - lockups with mmapped files
Hello jp wrote: Hi, I have to begin my tests of reiser4 / 2.6.14 ASAP, but I can't use a release candidate version of the kernel for my project ;) When will the vanilla patch be released ? yes. When ftp://ftp.namesys.com/pub/reiser4-for-2.6/2.6.14-rc5-mm1/reiser4-update-for-2.6.14-rc5-mm1-1.gz has more testing - there will be made a patch for 2.6.14. I think it will happen at the beginning of next week Best regards JP
Re: reiser4 in 2.6.14 - lockups with mmapped files
cool :) Vladimir V. Saveliev wrote: Hello jp wrote: Hi, I have to begin my tests of reiser4 / 2.6.14 ASAP, but I can't use a release candidate version of the kernel for my project ;) When will the vanilla patch be released ? yes. When ftp://ftp.namesys.com/pub/reiser4-for-2.6/2.6.14-rc5-mm1/reiser4-update-for-2.6.14-rc5-mm1-1.gz has more testing - there will be made a patch for 2.6.14. I think it will happen at the beginning of next week Best regards JP
SOLVED: reiser4 in 2.6.14 - lockups with mmapped files
On Di, 2005-11-01 at 16:50 +0100, Fionn Behrens wrote: Hi all, it looks like any time any mmapped file is synced to a reiser4 partition, the process who tries to do that will freeze forever. The archck patch maintainer released an update which no longer exhibits the problem. After several hours of run time and some stress tests I didnt experience a problem so far. thanks for your advice and best regards, Fionn -- Taking away civil rights to protect a free democracy is like taking off the tires of a car to protect it from flats. signature.asc Description: This is a digitally signed message part
Re: reiser4 in 2.6.14 - lockups with mmapped files
In the mean time I mailed the archck patch maintainer and he readily acknowledged that his reiser4 patch is flawed. He recommended that I should apply the *-2 patches from ftp.namesys.com/pub/reiser4-for-2.6/2.6.14-rc4-mm1 . Unfortunately the spinlock-2 patch wont apply cleanly but has seven failed hunks. Since I have no idea how relevant these patches are I wanted to ask again whether I should try to fix that patch or just leave it for now and try the USE_EFLUSH(1) solution first? What would be the most effective approach? br, Fionn -- New laws should have better reasons than recommended by lawyers and they handle it the same way in the US. *** Lawrence Lessig signature.asc Description: This is a digitally signed message part
Re: reiser4 in 2.6.14 - lockups with mmapped files
Hello Fionn Behrens wrote: In the mean time I mailed the archck patch maintainer and he readily acknowledged that his reiser4 patch is flawed. He recommended that I should apply the *-2 patches from ftp.namesys.com/pub/reiser4-for-2.6/2.6.14-rc4-mm1 . Unfortunately the spinlock-2 patch wont apply cleanly but has seven failed hunks. You should apply ftp://ftp.namesys.com/pub/reiser4-for-2.6/2.6.14-rc4-mm1/reiser4-fix-livelock-2.patch and then ftp://ftp.namesys.com/pub/reiser4-for-2.6/2.6.14-rc4-mm1/reiser4-spinlock-cleanup-2.patch to clean 2.6.14-rc4-mm1. I just tried that and everything worked fine. Since I have no idea how relevant these patches are I wanted to ask again whether I should try to fix that patch or just leave it for now and try the USE_EFLUSH(1) solution first? What would be the most effective approach? You should use 2.6.14-rc5-mm1. If your filesystem load encounteres lockup - you should try to set REISER4_USE_EFLUSH to 1. If that does not help - please report the bug.
Re: reiser4 in 2.6.14 - lockups with mmapped files
Hi, I have to begin my tests of reiser4 / 2.6.14 ASAP, but I can't use a release candidate version of the kernel for my project ;) When will the vanilla patch be released ? Best regards JP
reiser4 in 2.6.14 - lockups with mmapped files
Hi all, you may remember my recent story from userland. Stubborn as I am, I decided to give 2.6.14 another shot for it. Following a recommendation found in the above mentioned thread, I tried the patch from http://iphitus.loudas.com/archck.php this time, which includes the latest reiser4 from mm. Unfortunately I once more hit the wall and was forced to go back to 2.6.11 (including another --build-fs run to regain compatibility with the old but working reiser4 drivers). I wish there was a mount option to exclude the new extensions so I can test new kernels without losing half a day for fscking when things get whacky. This time suspend seemingly works without reiser4 processes freaking out. But now it looks like any time any mmapped file is synced to a reiser4 partition, the process who tries to do that will freeze forever. In addition, any process trying to access the open mmapped file afterwards will freeze forever as well. I created a screenshot of an strace running while this happened. Find it at http://fionn.de/reiser4again.jpg Of course, tests on files on other file systems than reiser4 did not show this behaviour. I tested on two different Systems, one Pentium M and one Athlon, same result. I wish I knew what I am doing wrong. I'd bet you guys all have reiser4 up and running with 2.6.14 and no problems at all. Or what? best regards, Fionn -- Taking away civil rights to protect a free democracy is like taking off the tires of a car to protect it from flats. signature.asc Description: This is a digitally signed message part
Re: reiser4 in 2.6.14 - lockups with mmapped files
Hello Fionn Behrens wrote: Hi all, you may remember my recent story from userland. Stubborn as I am, I decided to give 2.6.14 another shot for it. Following a recommendation found in the above mentioned thread, I tried the patch from http://iphitus.loudas.com/archck.php this time, which includes the latest reiser4 from mm. Unfortunately I once more hit the wall and was forced to go back to 2.6.11 (including another --build-fs run to regain compatibility with the old but working reiser4 drivers). I wish there was a mount option to exclude the new extensions so I can test new kernels without losing half a day for fscking when things get whacky. Did fsck.reiser4 say you that you have to --build-fs? This time suspend seemingly works without reiser4 processes freaking out. But now it looks like any time any mmapped file is synced to a reiser4 partition, the process who tries to do that will freeze forever. In Can you please check what fs/reiser4/reiser4.h:REISER4_USE_EFLUSH is set to? If it is 0, please try your test having it set to 1. addition, any process trying to access the open mmapped file afterwards will freeze forever as well. I created a screenshot of an strace running while this happened. Find it at http://fionn.de/reiser4again.jpg If the above does not help - would you please set up either sereial console or netconsole and catch sysrq-T output with its help? Of course, tests on files on other file systems than reiser4 did not show this behaviour. I tested on two different Systems, one Pentium M and one Athlon, same result. I wish I knew what I am doing wrong. I'd bet you guys all have reiser4 up and running with 2.6.14 and no problems at all. Or what? best regards, Fionn
Re: reiser4 in 2.6.14 - lockups with mmapped files
On Di, 2005-11-01 at 19:25 +0300, Vladimir V. Saveliev wrote: Fionn Behrens wrote: Unfortunately I once more hit the wall and was forced to go back to 2.6.11 (including another --build-fs run to regain compatibility with the old but working reiser4 drivers). I wish there was a mount option to exclude the new extensions so I can test new kernels without losing half a day for fscking when things get whacky. Did fsck.reiser4 say you that you have to --build-fs? Yes, after I went back to 2.6.11 I tried --fix first but it said indeed that I have to --build-fs and so I did. But now it looks like any time any mmapped file is synced to a reiser4 partition, the process who tries to do that will freeze forever. In Can you please check what fs/reiser4/reiser4.h:REISER4_USE_EFLUSH is set to? If it is 0, please try your test having it set to 1. It is set to 0. I changed it to 1. What is the supposed result of this change? I am somewhat reluctant to try it and risk yet another two hours of fschecking. Maybe tomorrow night. If it doesnt work again, I'll get you some screenshots of the fscheck, too. If the above does not help - would you please set up either sereial console or netconsole and catch sysrq-T output with its help? Would another screenshot do the trick as well? br, Fionn -- I believe we have been called by history to lead the world. G.W. Bush, 2002-03-01 signature.asc Description: This is a digitally signed message part
Re: reiser4 in 2.6.14 - lockups with mmapped files
Fionn Behrens wrote (ao): On Di, 2005-11-01 at 19:25 +0300, Vladimir V. Saveliev wrote: Can you please check what fs/reiser4/reiser4.h:REISER4_USE_EFLUSH is set to? If it is 0, please try your test having it set to 1. It is set to 0. I changed it to 1. What is the supposed result of this change? I am somewhat reluctant to try it and risk yet another two hours of fschecking. Maybe tomorrow night. If it doesnt work again, I'll get you some screenshots of the fscheck, too. Maybe you can create a small partition with a minimal OS on which you boot new these test kernels? -- Humilis IT Services and Solutions http://www.humilis.net
