Paul Clements a336d29870 nbd: handle discard requests ... Add discard support to nbd. If the nbd-server supports discard, it will send NBD_FLAG_SEND_TRIM to the client. The client will then set the flag in the kernel via NBD_SET_FLAGS, which tells the kernel to enable discards for the device (QUEUE_FLAG_DISCARD). If discard support is enabled, then when the nbd client system receives a discard request, this will be passed along to the nbd-server. When the discard request is received by the nbd-server, it will perform: fallocate(.. FALLOC_FL_PUNCH_HOLE ..) To punch a hole in the backend storage, which is no longer needed. Signed-off-by: Paul Clements <paul.clements@steeleye.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>		2012-10-06 03:05:24 +09:00
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acpi	Prepared for main script	2012-10-03 13:45:43 -07:00
asm-generic	bitops: introduce generic {clear,set}_bit_le()	2012-10-06 03:04:55 +09:00
clocksource
crypto
drm	Merge branch 'drm-next' of git://people.freedesktop.org/~airlied/linux	2012-10-03 23:29:23 -07:00
keys
linux	nbd: handle discard requests	2012-10-06 03:05:24 +09:00
math-emu
media
memory
misc
mtd
net	sections: fix section conflicts in net	2012-10-06 03:04:45 +09:00
pcmcia
ras
rdma
rxrpc
scsi	Prepared for main script	2012-10-03 13:45:43 -07:00
sound
target
trace
uapi
video
xen	Prepared for main script	2012-10-03 13:45:43 -07:00
Kbuild