[PATCH 00/20] Staging: hv: Cleanup-storage-drivers-phase-II
From: K. Y. Srinivasan
Date: Mon Mar 28 2011 - 12:21:59 EST
This patch-set restructures and cleans up struct hv_storvsc_request.
In the current code, two data structures: struct hv_storvsc_request
and struct storvsc_request_extension together are used to carry
the I/O state and there are many issues with this current
architecture:
1) The memory for extension data structure
is allocatted just after the data buffer
field in struct hv_storvsc_request resulting in comments
such as this in struct blkvsc_request (blkvsc_drv.c):
/*
* !!!DO NOT ADD ANYTHING BELOW HERE!!! Otherwise, memory can overlap,
* because - The extension buffer falls right here and is pointed to by
* request.Extension;
* Which sounds like a horrible idea, who designed this?
*/
2) State is unnecessarily replicated in both struct hv_storvsc_request
and the struct vstor_packet that is embedded in
struct storvsc_request_extension.
This patch-set addresses the above issues by geting rid of replicated
state and consolidating all necessary state into a single data structure.
We also deal with a range of other cleanups in this patch-set:
1) Use completion primitives to wait for completion.
2) Get rid of the synch primitive in struct blkvsc_request
3) Get rid of the need for struct hv_device to be the first
element of struct host_device_context.
Regards,
K. Y
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/