A doubt regarding submit_bio()

Gaurav Mahajan gauravmahajan2007 at gmail.com
Mon Dec 27 14:25:12 EST 2010

Hello all,

I am working on a operation in which I need to assure the order of
bio_end_io() functions.
Consider the scenario,

If I submit two bio requests using submit_bio() function one after
another, then is there any guarantee that the bio_end_io() for the
bios will be invoked in the same order in which I submitted the bios?

Basically I mean to say, would the generic block layer or I/O
scheduler maintain the order of bios submitted to them?

Hoping for some help.


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