Re: [Qemu-devel] Problem with data miscompare using scsi-hd, cache=none and io=threads

2018-05-16 Thread Daniel Henrique Barboza
On 05/16/2018 06:35 PM, Daniel Henrique Barboza wrote: On 05/16/2018 04:47 AM, Paolo Bonzini wrote: On 15/05/2018 23:25, Daniel Henrique Barboza wrote: This is the current status of this investigation. I decided to start a discussion here, see if someone can point me something that I overl

Re: [Qemu-devel] Problem with data miscompare using scsi-hd, cache=none and io=threads

2018-05-16 Thread Daniel Henrique Barboza
On 05/16/2018 06:47 AM, Dr. David Alan Gilbert wrote: * Daniel Henrique Barboza (danie...@linux.ibm.com) wrote: Hi, I've been working in the last two months in a miscompare issue that happens when using a raid device and a SATA as scsi-hd (emulated SCSI) with cache=none and io=threads during

Re: [Qemu-devel] Problem with data miscompare using scsi-hd, cache=none and io=threads

2018-05-16 Thread Daniel Henrique Barboza
On 05/16/2018 04:47 AM, Paolo Bonzini wrote: On 15/05/2018 23:25, Daniel Henrique Barboza wrote: This is the current status of this investigation. I decided to start a discussion here, see if someone can point me something that I overlooked or got it wrong, before I started changing the POSIX

Re: [Qemu-devel] Problem with data miscompare using scsi-hd, cache=none and io=threads

2018-05-16 Thread Dr. David Alan Gilbert
* Daniel Henrique Barboza (danie...@linux.ibm.com) wrote: > Hi, > > I've been working in the last two months in a miscompare issue that happens > when using a raid device and a SATA as scsi-hd (emulated SCSI) with > cache=none and io=threads during a hardware stress test. I'll summarize it > here

Re: [Qemu-devel] Problem with data miscompare using scsi-hd, cache=none and io=threads

2018-05-16 Thread Paolo Bonzini
On 15/05/2018 23:25, Daniel Henrique Barboza wrote: > This is the current status of this investigation. I decided to start a > discussion here, see if someone can point me something that I overlooked > or got it wrong, before I started changing the POSIX thread pool > behavior to see if I can enfor

[Qemu-devel] Problem with data miscompare using scsi-hd, cache=none and io=threads

2018-05-15 Thread Daniel Henrique Barboza
Hi, I've been working in the last two months in a miscompare issue that happens when using a raid device and a SATA as scsi-hd (emulated SCSI) with cache=none and io=threads during a hardware stress test. I'll summarize it here as best as I can without creating a great wall of text - Red Hat