kernel_optimize_test/include
Ken Chen 7328508274 remove artificial software max_loop limit
Remove artificial maximum 256 loop device that can be created due to a
legacy device number limit.  Searching through lkml archive, there are
several instances where users complained about the artificial limit that
the loop driver impose.  There is no reason to have such limit.

This patch rid the limit entirely and make loop device and associated block
queue instantiation on demand.  With on-demand instantiation, it also gives
the benefit of not wasting memory if these devices are not in use (compare
to current implementation that always create 8 loop devices), a net
improvement in both areas.  This version is both tested with creation of
large number of loop devices and is compatible with existing losetup/mount
user land tools.

There are a number of people who worked on this and provided valuable
suggestions, in no particular order, by:

Jens Axboe
Jan Engelhardt
Christoph Hellwig
Thomas M

Signed-off-by: Ken Chen <kenchen@google.com>
Cc: Jan Engelhardt <jengelh@linux01.gwdg.de>
Cc: Christoph Hellwig <hch@lst.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-05-08 11:15:07 -07:00
..
acpi remove "struct subsystem" as it is no longer needed 2007-05-02 18:57:59 -07:00
asm-alpha move die notifier handling to common code 2007-05-08 11:15:04 -07:00
asm-arm move die notifier handling to common code 2007-05-08 11:15:04 -07:00
asm-arm26 move die notifier handling to common code 2007-05-08 11:15:04 -07:00
asm-avr32 move die notifier handling to common code 2007-05-08 11:15:04 -07:00
asm-blackfin blackfin architecture 2007-05-07 12:12:58 -07:00
asm-cris move die notifier handling to common code 2007-05-08 11:15:04 -07:00
asm-frv move die notifier handling to common code 2007-05-08 11:15:04 -07:00
asm-generic move die notifier handling to common code 2007-05-08 11:15:04 -07:00
asm-h8300 move die notifier handling to common code 2007-05-08 11:15:04 -07:00
asm-i386 move die notifier handling to common code 2007-05-08 11:15:04 -07:00
asm-ia64 move die notifier handling to common code 2007-05-08 11:15:04 -07:00
asm-m32r move die notifier handling to common code 2007-05-08 11:15:04 -07:00
asm-m68k move die notifier handling to common code 2007-05-08 11:15:04 -07:00
asm-m68knommu move die notifier handling to common code 2007-05-08 11:15:04 -07:00
asm-mips move die notifier handling to common code 2007-05-08 11:15:04 -07:00
asm-parisc move die notifier handling to common code 2007-05-08 11:15:04 -07:00
asm-powerpc parport->dev driver model support 2007-05-08 11:15:05 -07:00
asm-ppc move die notifier handling to common code 2007-05-08 11:15:04 -07:00
asm-s390 move die notifier handling to common code 2007-05-08 11:15:04 -07:00
asm-sh move die notifier handling to common code 2007-05-08 11:15:04 -07:00
asm-sh64 move die notifier handling to common code 2007-05-08 11:15:04 -07:00
asm-sparc move die notifier handling to common code 2007-05-08 11:15:04 -07:00
asm-sparc64 move die notifier handling to common code 2007-05-08 11:15:04 -07:00
asm-um move die notifier handling to common code 2007-05-08 11:15:04 -07:00
asm-v850 move die notifier handling to common code 2007-05-08 11:15:04 -07:00
asm-x86_64 move die notifier handling to common code 2007-05-08 11:15:04 -07:00
asm-xtensa move die notifier handling to common code 2007-05-08 11:15:04 -07:00
crypto [CRYPTO] cryptd: Add software async crypto daemon 2007-05-02 14:38:32 +10:00
keys
linux remove artificial software max_loop limit 2007-05-08 11:15:07 -07:00
math-emu Delete unused header file math-emu/extended.h 2007-05-08 11:15:05 -07:00
media i2c: Cleanup the includes of <linux/i2c.h> 2007-05-01 23:26:29 +02:00
mtd
net [MAC80211]: Add mac80211 wireless stack. 2007-05-05 11:45:53 -07:00
pcmcia add new_id to PCMCIA drivers 2007-05-07 12:12:50 -07:00
rdma Merge branch 'for-linus' of master.kernel.org:/pub/scm/linux/kernel/git/roland/infiniband 2007-05-07 12:18:21 -07:00
rxrpc
scsi
sound
video
Kbuild