Date: Fri, 19 Dec 2014 11:16:36 -0700 From: Stephen Mcconnell <stephen.mcconnell@avagotech.com> To: Konstantin Belousov <kib@freebsd.org> Cc: freebsd-scsi@freebsd.org Subject: changing kern.bio_transient_maxcnt fixes panic Message-ID: <ceed8e57113129c0425c649b457afb89@mail.gmail.com>
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changing kern.bio_transient_maxcnt fixes panic Hi Konstantine. I hope you are the right person to help with this. Or perhaps someone else on the list can help. We (Avago) have a customer who is getting the following panic. They are using the mrsas (MegaRAID) driver in FreeBSD 10. In a test, they tried to restore a database backup of 3GB. After the restore they queried the database and then saw the panic. They found this link, saying that changing the value of kern.bio_transient_maxcnt should fix the problem. It did fix the problem, be we would like to know why it helped so that we=E2= =80=99re not just putting a band-aid on it. *https://lists.freebsd.org/pipermail/freebsd-stable/2013-October/075577.htm= l* <https://lists.freebsd.org/pipermail/freebsd-stable/2013-October/075577.htm= l> Also, I found this link with the same type of question. *https://docs.freebsd.org/cgi/getmsg.cgi?fetch=3D179246+182329+/usr/local/w= ww/db/text/2014/freebsd-questions/20141019.freebsd-questions* <https://docs.freebsd.org/cgi/getmsg.cgi?fetch=3D179246+182329+/usr/local/w= ww/db/text/2014/freebsd-questions/20141019.freebsd-questions> Can you explain why changing this value fixes this problem, and what we might need to do in the driver to make a permanent fix? Thanks for your help, Stephen McConnell Avago Technologies <<...>>
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