Date: Fri, 08 Aug 2014 16:21:26 -0400 From: Mike Tancsa <mike@sentex.net> To: Adam Vande More <amvandemore@gmail.com> Cc: "freebsd-emulation@freebsd.org" <emulation@freebsd.org> Subject: Re: Making disk IO place nicely in a guest (VirtualBox) Message-ID: <53E53146.6070205@sentex.net> In-Reply-To: <CA%2BtpaK3b3Zi=6zrFFvLbUmm305zqBL-HV-_ZrcJ4OGAu39dXVA@mail.gmail.com> References: <53E3C33E.5030004@sentex.net> <CA%2BtpaK2VzHWrDg1H0XFhEtFPpZ_Q77iCDOJDLBSBS_8YpWEN2Q@mail.gmail.com> <53E3EA14.2060902@sentex.net> <CA%2BtpaK3b3Zi=6zrFFvLbUmm305zqBL-HV-_ZrcJ4OGAu39dXVA@mail.gmail.com>
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On 8/7/2014 5:27 PM, Adam Vande More wrote: > > The error messages shown are classic swap on ZFS errors which is > inherently unstable especially under high IO loads. Hi Adam, I am still running into the guest crashing, or throwing disk errors even when the Hypervisor is not touching swap. I brought the Hypervisor OS upto date (r269715) and only ran the one guest instance # pstat -T 191/514621 files 0M/16384M swap space I tried with a RELENG7 instance, trying to extract a large tar file and it crashed as the parent's disk was too busy ad0: FAILURE - device detached g_vfs_done():ad0s1d[WRITE(offset=175350517766, length=2048)]error=6 /var: got error 6 while accessing filesystem panic: softdep_deallocate_dependencies: unrecovered I/O error cpuid = 0 On the RELENG_10 guest instance (r269271), I still get the odd ahcich0: Timeout on slot 15 port 0 ahcich0: is 00000000 cs 00000000 ss 0fff8000 rs 0fff8000 tfd 50 serr 00000000 cmd 1000dd17 (ada0:ahcich0:0:0:0): WRITE_FPDMA_QUEUED. ACB: 61 00 e8 7f 20 40 02 00 00 01 00 00 (ada0:ahcich0:0:0:0): CAM status: Command timeout (ada0:ahcich0:0:0:0): Retrying command When doing the same test with Linux as the hypervisor, there are no errors in the guests. ---Mike -- ------------------- Mike Tancsa, tel +1 519 651 3400 Sentex Communications, mike@sentex.net Providing Internet services since 1994 www.sentex.net Cambridge, Ontario Canada http://www.tancsa.com/
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