Revision db3b5848ea6440968fcdd29b80514d0de044bb7c authored by Kiyoshi Ueda on 17 June 2005, 14:15:10 UTC, committed by Jens Axboe on 17 June 2005, 14:15:10 UTC
__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>
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| File | Mode | Size |
|---|---|---|
| irq | ||
| power | ||
| Makefile | -rw-r--r-- | 2.1 KB |
| acct.c | -rw-r--r-- | 14.4 KB |
| audit.c | -rw-r--r-- | 23.2 KB |
| auditsc.c | -rw-r--r-- | 28.6 KB |
| capability.c | -rw-r--r-- | 5.8 KB |
| compat.c | -rw-r--r-- | 21.4 KB |
| configs.c | -rw-r--r-- | 3.3 KB |
| cpu.c | -rw-r--r-- | 4.2 KB |
| cpuset.c | -rw-r--r-- | 40.1 KB |
| dma.c | -rw-r--r-- | 3.5 KB |
| exec_domain.c | -rw-r--r-- | 4.3 KB |
| exit.c | -rw-r--r-- | 38.5 KB |
| extable.c | -rw-r--r-- | 2.0 KB |
| fork.c | -rw-r--r-- | 31.3 KB |
| futex.c | -rw-r--r-- | 19.3 KB |
| intermodule.c | -rw-r--r-- | 5.1 KB |
| itimer.c | -rw-r--r-- | 6.8 KB |
| kallsyms.c | -rw-r--r-- | 10.4 KB |
| kfifo.c | -rw-r--r-- | 4.7 KB |
| kmod.c | -rw-r--r-- | 7.2 KB |
| kprobes.c | -rw-r--r-- | 7.1 KB |
| ksysfs.c | -rw-r--r-- | 1.3 KB |
| kthread.c | -rw-r--r-- | 4.7 KB |
| module.c | -rw-r--r-- | 52.9 KB |
| panic.c | -rw-r--r-- | 3.4 KB |
| params.c | -rw-r--r-- | 16.8 KB |
| pid.c | -rw-r--r-- | 7.5 KB |
| posix-cpu-timers.c | -rw-r--r-- | 40.8 KB |
| posix-timers.c | -rw-r--r-- | 44.9 KB |
| printk.c | -rw-r--r-- | 25.2 KB |
| profile.c | -rw-r--r-- | 14.9 KB |
| ptrace.c | -rw-r--r-- | 8.8 KB |
| rcupdate.c | -rw-r--r-- | 14.0 KB |
| resource.c | -rw-r--r-- | 11.6 KB |
| sched.c | -rw-r--r-- | 124.4 KB |
| seccomp.c | -rw-r--r-- | 1.1 KB |
| signal.c | -rw-r--r-- | 69.2 KB |
| softirq.c | -rw-r--r-- | 11.1 KB |
| spinlock.c | -rw-r--r-- | 7.7 KB |
| stop_machine.c | -rw-r--r-- | 4.8 KB |
| sys.c | -rw-r--r-- | 39.9 KB |
| sys_ni.c | -rw-r--r-- | 2.3 KB |
| sysctl.c | -rw-r--r-- | 54.3 KB |
| time.c | -rw-r--r-- | 15.6 KB |
| timer.c | -rw-r--r-- | 41.8 KB |
| uid16.c | -rw-r--r-- | 4.2 KB |
| user.c | -rw-r--r-- | 4.3 KB |
| wait.c | -rw-r--r-- | 7.1 KB |
| workqueue.c | -rw-r--r-- | 13.5 KB |
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