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SubjectRe: [PATCH] add check do_direct_IO() return val
Joe Jin wrote:
>> Well, I'm having a heck of a time getting this to fail. It looks
>> possible, though. Joe, were you guys able to narrow it down to a
>> reproducible test case? Do you have any oops output messages from
>> the crashes?
>>
>
> Zach, it easy to reproduce through fio with following config file
>
> # cat jobfile
> [global]
> bs=8k
> iodepth=1024
> iodepth_batch=60
> randrepeat=1
> size=1m
> directory=/home/oracle
> numjobs=20
> [job1]
> ioengine=sync
> bs=1k
> direct=1
> rw=randread
> filename=file1:file2
> [job2]
> ioengine=libaio
> rw=randwrite
> direct=1
> filename=file1:file2
> [job3]
> bs=1k
> ioengine=posixaio
> rw=randwrite
> direct=1
> filename=file1:file2
> [job4]
> ioengine=splice
> direct=1
> rw=randwrite
> filename=file1:file2
> [job5]
> bs=1k
> ioengine=sync
> rw=randread
> filename=file1:file2
> [job7]
> ioengine=libaio
> rw=randwrite
> filename=file1:file2
> [job8]
> ioengine=posixaio
> rw=randwrite
> filename=file1:file2
> [job9]
> ioengine=splice
> rw=randwrite
> filename=file1:file2
> [job10]
> ioengine=mmap
> rw=randwrite
> bs=1k
> filename=file1:file2
> [job11]
> ioengine=mmap
> rw=randwrite
> direct=1
> filename=file1:file2
>
>
Hmm.. in this config file, whats causing DIO to panic ? Which test actually
passing faulty buffer ?

Thanks,
Badari
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