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>
1 parent c374f12
| File | Mode | Size |
|---|---|---|
| adfs | ||
| affs | ||
| afs | ||
| autofs | ||
| autofs4 | ||
| befs | ||
| bfs | ||
| cifs | ||
| coda | ||
| cramfs | ||
| debugfs | ||
| devfs | ||
| devpts | ||
| efs | ||
| exportfs | ||
| ext2 | ||
| ext3 | ||
| fat | ||
| freevxfs | ||
| hfs | ||
| hfsplus | ||
| hostfs | ||
| hpfs | ||
| hppfs | ||
| hugetlbfs | ||
| isofs | ||
| jbd | ||
| jffs | ||
| jffs2 | ||
| jfs | ||
| lockd | ||
| minix | ||
| msdos | ||
| ncpfs | ||
| nfs | ||
| nfsd | ||
| nls | ||
| ntfs | ||
| openpromfs | ||
| partitions | ||
| proc | ||
| qnx4 | ||
| ramfs | ||
| reiserfs | ||
| romfs | ||
| smbfs | ||
| sysfs | ||
| sysv | ||
| udf | ||
| ufs | ||
| umsdos | ||
| vfat | ||
| xfs | ||
| Kconfig | -rw-r--r-- | 63.6 KB |
| Kconfig.binfmt | -rw-r--r-- | 5.3 KB |
| Makefile | -rw-r--r-- | 3.0 KB |
| aio.c | -rw-r--r-- | 43.3 KB |
| attr.c | -rw-r--r-- | 5.0 KB |
| bad_inode.c | -rw-r--r-- | 2.8 KB |
| binfmt_aout.c | -rw-r--r-- | 14.8 KB |
| binfmt_elf.c | -rw-r--r-- | 45.2 KB |
| binfmt_elf_fdpic.c | -rw-r--r-- | 30.3 KB |
| binfmt_em86.c | -rw-r--r-- | 2.8 KB |
| binfmt_flat.c | -rw-r--r-- | 25.8 KB |
| binfmt_misc.c | -rw-r--r-- | 15.6 KB |
| binfmt_script.c | -rw-r--r-- | 2.7 KB |
| binfmt_som.c | -rw-r--r-- | 7.7 KB |
| bio.c | -rw-r--r-- | 25.4 KB |
| block_dev.c | -rw-r--r-- | 21.7 KB |
| buffer.c | -rw-r--r-- | 81.9 KB |
| char_dev.c | -rw-r--r-- | 9.2 KB |
| compat.c | -rw-r--r-- | 47.0 KB |
| compat_ioctl.c | -rw-r--r-- | 85.0 KB |
| dcache.c | -rw-r--r-- | 43.9 KB |
| dcookies.c | -rw-r--r-- | 6.3 KB |
| direct-io.c | -rw-r--r-- | 34.5 KB |
| dnotify.c | -rw-r--r-- | 4.3 KB |
| dquot.c | -rw-r--r-- | 51.6 KB |
| eventpoll.c | -rw-r--r-- | 44.0 KB |
| exec.c | -rw-r--r-- | 33.7 KB |
| fcntl.c | -rw-r--r-- | 13.1 KB |
| fifo.c | -rw-r--r-- | 3.2 KB |
| file.c | -rw-r--r-- | 5.5 KB |
| file_table.c | -rw-r--r-- | 5.9 KB |
| filesystems.c | -rw-r--r-- | 5.2 KB |
| fs-writeback.c | -rw-r--r-- | 19.7 KB |
| inode.c | -rw-r--r-- | 34.3 KB |
| ioctl.c | -rw-r--r-- | 3.9 KB |
| libfs.c | -rw-r--r-- | 12.9 KB |
| locks.c | -rw-r--r-- | 54.3 KB |
| mbcache.c | -rw-r--r-- | 18.3 KB |
| mpage.c | -rw-r--r-- | 20.6 KB |
| namei.c | -rw-r--r-- | 59.8 KB |
| namespace.c | -rw-r--r-- | 34.8 KB |
| nfsctl.c | -rw-r--r-- | 2.5 KB |
| open.c | -rw-r--r-- | 23.1 KB |
| pipe.c | -rw-r--r-- | 18.1 KB |
| posix_acl.c | -rw-r--r-- | 8.6 KB |
| quota.c | -rw-r--r-- | 8.8 KB |
| quota_v1.c | -rw-r--r-- | 5.7 KB |
| quota_v2.c | -rw-r--r-- | 20.1 KB |
| read_write.c | -rw-r--r-- | 15.3 KB |
| readdir.c | -rw-r--r-- | 6.7 KB |
| select.c | -rw-r--r-- | 12.2 KB |
| seq_file.c | -rw-r--r-- | 9.5 KB |
| stat.c | -rw-r--r-- | 9.2 KB |
| super.c | -rw-r--r-- | 19.9 KB |
| xattr.c | -rw-r--r-- | 10.3 KB |
| xattr_acl.c | -rw-r--r-- | 2.3 KB |
Computing file changes ...
