swsusp: use rbtree for tracking allocated swap

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Make swsusp use extents instead of a bitmap to trace swap pages allocated
for saving the image (the tracking is only needed in case there's an error,
so that the allocated swap pages can be released).

This should allow us to reduce the memory usage, practically always, and
improve performance.

Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Cc: Nigel Cunningham <nigel@nigel.suspend2.net>
Cc: Pavel Machek <pavel@ucw.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

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This commit is contained in:

Rafael J. Wysocki 2007-05-06 14:50:47 -07:00 • committed by Linus Torvalds

parent 726162b5da

commit d1d241cc2c

4 changed files with 86 additions and 118 deletions

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27

kernel/power/power.h

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18

kernel/power/swap.c

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137

kernel/power/swsusp.c

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22

kernel/power/user.c

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