On Mon, Dec 11, 2017 at 8:13 PM, Amon Ott <a.ott@xxxxxxxxxxxx> wrote: > Hello Ceph folks, > > when running latest Stable 64 Bit Google Chrome under Linux with home > dirs on cephfs, I get the attached kernel trace and cephfs access hangs > afterwards. Umounting cephfs no longer works, only a hard system reset > helps. Since it only happens on cephfs, I hope to get some help here. > > Kernel versions tested are 4.9.67 and 4.9.68, each with RSBAC patched > in. However, RSBAC does not touch these funktions. Since 4.9.68 just had > a fix related to page_mkwrite(), it might be related. The trace can be > reproduced with every start of Chrome, but we have not seen anything > similar with other applications, e.g. Firefox. Ceph backend lives on xfs > or btrfs on the same system, crash happens with both. > > Thanks for all your good work, it's likely caused by following code in ceph_read_iter() current->journal_info = filp; ret = generic_file_read_iter(iocb, to); current->journal_info = NULL; ceph set current->journal_info, which confuses ext4. I will try writing a fix tomorrow. Regards Yan, Zheng > > Amon Ott > -- > Dr. Amon Ott > m-privacy GmbH Tel: +49 30 24342334 > Werner-Voß-Damm 62 Fax: +49 30 99296856 > 12101 Berlin http://www.m-privacy.de > > Amtsgericht Charlottenburg, HRB 84946 > > Geschäftsführer: > Dipl.-Kfm. Holger Maczkowsky, > Roman Maczkowsky > > GnuPG-Key-ID: 0x2DD3A649 > -- To unsubscribe from this list: send the line "unsubscribe ceph-devel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
