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I/O queue on LVM device v.s. I/O queue on underlying device(s)

dm-1 / alan_dell_2016-swap is an LVM Logical Volume, which is physically stored on partition sda7 of the device sda. NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT sda ...
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veritysetup verify successful but mount fails after upgrade to new kernel

We are using dm-verity for a squashfs root file system. Using kernel 4.8.4 everything was ok, after upgrading to kernel 4.14.14 mount fails, even though the veritysetup verify command validates the ...
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87 views

Is Block device aware of the actual user/process which initiates read/write?

The VFS knows which user/process has sent read/write request. Is the actual block device aware of these details. Does 'bio' struct contain any details which point to the user space parameters? Using ...
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119 views

Why does libdevmapper have data structures?

As I'm looking through libdevmapper.h for clues on how to properly use device mapper ioctls (or potentially use libdevmapper instead), I'm confused as to why there is code in here for creating/...
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Can dm-crypt be configured to ask for key on every read/write?

My understanding is that dm-crypt serves to abstract the actual block device so that the read/decrypt and write/encrypt happen automatically. However, assuming a device mapping with target: crypt is ...