Kiyoshi Ueda db3b5848ea When cfq I/O scheduler is selected, get_request() in __make_request() calls ... __cfq_get_queue(). __cfq_get_queue() finds an existing queue (struct cfq_queue) of the current process for the device and returns it. If it's not found, __cfq_get_queue() creates and returns a new one if __cfq_get_queue() is called with __GFP_WAIT flag, or __cfq_get_queue() returns NULL (this means that get_request() fails) if no __GFP_WAIT flag. On the other hand, in __make_request(), get_request() is called without __GFP_WAIT flag at the first time. Thus, the get_request() fails when there is no existing queue, typically when it's called for the first I/O request of the process to the device. Though it will be followed by get_request_wait() for general case, __make_request() will just end the I/O with an error (EWOULDBLOCK) when the request was for read-ahead. Signed-off-by: Jens Axboe <axboe@suse.de> Signed-off-by: Kiyoshi Ueda <k-ueda@ct.jp.nec.com> Signed-off-by: Jun'ichi Nomura <j-nomura@ce.jp.nec.com>		2005-06-17 16:15:10 +02:00
..
aoe	[PATCH] aoe: update version number to 10	2005-05-03 23:34:55 -07:00
paride
acsi_slm.c
acsi.c
amiflop.c
as-iosched.c
ataflop.c
cciss_cmd.h
cciss_scsi.c
cciss_scsi.h
cciss.c
cciss.h
cfq-iosched.c	When cfq I/O scheduler is selected, get_request() in __make_request() calls	2005-06-17 16:15:10 +02:00
cpqarray.c
cpqarray.h
cryptoloop.c
DAC960.c	[PATCH] DAC960: add support for Mylex AcceleRAID 4/5/600	2005-05-05 16:36:43 -07:00
DAC960.h	[PATCH] DAC960: add support for Mylex AcceleRAID 4/5/600	2005-05-05 16:36:43 -07:00
deadline-iosched.c
elevator.c	This patch fixes q->unplug_thresh condition check in	2005-06-16 12:57:31 +02:00
floppy.c	[PATCH] remove do_sync parameter from __invalidate_device	2005-05-05 16:36:44 -07:00
genhd.c	[PATCH] remove do_sync parameter from __invalidate_device	2005-05-05 16:36:44 -07:00
ida_cmd.h
ida_ioctl.h
ioctl.c	[PATCH] Fix root hole in raw device	2005-05-16 21:07:21 -07:00
Kconfig	[PATCH] ISA DMA Kconfig fixes - part 3	2005-05-04 07:33:14 -07:00
Kconfig.iosched
ll_rw_blk.c
loop.c
Makefile
nbd.c	[PATCH] nbd: Don't create all MAX_NBD devices by default all the time	2005-05-01 08:59:07 -07:00
noop-iosched.c
pktcdvd.c	[PATCH] packet driver permission checking fix	2005-05-20 15:48:16 -07:00
ps2esdi.c
rd.c	[PATCH] drivers/block/rd.c: rd_size shouldn't be static	2005-05-06 16:58:18 -07:00
scsi_ioctl.c
smart1,2.h
swim_iop.c
swim3.c
sx8.c
ub.c	[PATCH] USB: fix ub issues	2005-06-09 01:38:11 -07:00
umem.c
viodasd.c
xd.c
xd.h
z2ram.c