xen-blkback: allocate list of pending reqs in small chunks

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Allocate pending requests in smaller chunks instead of allocating them
all at the same time.

This change also removes the global array of pending_reqs, it is no
longer necessay.

Variables related to the grant mapping have been grouped into a struct
called "grant_page", this allows to allocate them in smaller chunks,
and also improves memory locality.

Signed-off-by: Roger Pau Monné <roger.pau@citrix.com>
Reported-by: Sander Eikelenboom <linux@eikelenboom.it>
Tested-by: Sander Eikelenboom <linux@eikelenboom.it>
Reviewed-by: David Vrabel <david.vrabel@citrix.com>
Cc: David Vrabel <david.vrabel@citrix.com>
Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>

...

This commit is contained in:

Roger Pau Monne 2013-05-02 10:21:17 +02:00 • committed by Konrad Rzeszutek Wilk

parent 402b27f9f2

commit bb642e8315

3 changed files with 106 additions and 78 deletions

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92

drivers/block/xen-blkback/blkback.c

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18

drivers/block/xen-blkback/common.h

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76

drivers/block/xen-blkback/xenbus.c

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