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Date: Wed, 7 Oct 2015 17:42:53 +0300
From: Mike Krinkin <krinkin.m.u@gmail.com>
To: linux-kernel@vger.kernel.org
Cc: axboe@kernel.dk, hch@lst.de, kmo@daterainc.com, dmonakhov@openvz.org
Subject: submit bio directly from userspace
Message-ID: <20151007144253.GA26518@kmu-tp-x230>
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Hi,

i'm developing block layer workload simulator/player and need to
generate bios as close as possible to the ones in original workload.
To play workload i employ aio + O_DIRECT, but all IOs end up as bios
with SYNC flag set. So i wonder is there any way to control bios
flags from userspace or, maybe, any other options to generate
workload from userspace except aio + O_DIRECT with more precise
control over bio flags?