About SG Elements of request_buffer

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Hi All,

Thanks for all your support for my previous posts.

I have two questions.

1. Is it safe to assume that all the SG elements of request_buffer are page aligned? (Except the first one and last one), I mean, it is always multiple of pages?

2. What are situations reading a scsi disk (using dd ) cause a write to the disk? When I read my virtual scsi disk using dd command, block layer is generating lot of SCSI write, as well as reads. Any thoughts? Besides this observation, everything is working fine.

Thanks in advance.

Aboo


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