- 12 10月, 2006 2 次提交
-
-
由 Vasily Tarasov 提交于
elv_iosched_show function iterates other elv_list, hence elv_list_lock should be got. Signed-off-by: NVasily Tarasov <vtaras@openvz.org> Signed-off-by: NVasily Tarasov <jens.axboe@oracle.com>
-
由 Vasily Tarasov 提交于
We can easily produce search through the elevator list without introducing additional elevator_type variable. Signed-off-by: NVasily Tarasov <vtaras@openvz.org> Signed-off-by: NJens Axboe <jens.axboe@oracle.com>
-
- 05 10月, 2006 1 次提交
-
-
由 David C Somayajulu 提交于
This was necessitated by the need for a function to get back to a scsi_cmnd, when an hba the posts its (corresponding) completion interrupt with a block layer tag as its reference. Signed-off-by: NMike Christie <michaelc@cs.wisc.edu> Signed-off-by: NDavid Somayajulu <david.somayajulu@qlogic.com> Signed-off-by: NJens Axboe <jens.axboe@oracle.com>
-
- 03 10月, 2006 1 次提交
-
-
由 Alasdair G Kergon 提交于
Export blkdev_driver_ioctl for device-mapper. If we get as far as the device-mapper ioctl handler, we know the ioctl is not a standard block layer BLK* one, so we don't need to check for them a second time and can call blkdev_driver_ioctl() directly. Signed-off-by: NAlasdair G Kergon <agk@redhat.com> Signed-off-by: NAndrew Morton <akpm@osdl.org> Signed-off-by: NLinus Torvalds <torvalds@osdl.org>
-
- 01 10月, 2006 36 次提交
-
-
由 Peter Zijlstra 提交于
All on stack DECLARE_COMPLETIONs should be replaced by: DECLARE_COMPLETION_ONSTACK Signed-off-by: NPeter Zijlstra <a.p.zijlstra@chello.nl> Acked-by: NIngo Molnar <mingo@elte.hu> Acked-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: NAndrew Morton <akpm@osdl.org> Signed-off-by: NLinus Torvalds <torvalds@osdl.org>
-
由 Jens Axboe 提交于
It's too easy for people to shoot themselves in the foot, and it only makes sense for embedded folks anyway. Signed-off-by: NJens Axboe <axboe@kernel.dk>
-
由 Jens Axboe 提交于
If we share the tag map between two or more queues, then we cannot use __set_bit() to set the bit. In fact we need to make sure we atomically acquire this tag, so loop using test_and_set_bit() to protect from that. Noticed by Mike Christie <michaelc@cs.wisc.edu> Signed-off-by: NJens Axboe <axboe@kernel.dk>
-
由 Jens Axboe 提交于
As people often look for the copyright in files to see who to mail, update the link to a neutral one. Signed-off-by: NJens Axboe <axboe@kernel.dk>
-
由 David Howells 提交于
Make it possible to disable the block layer. Not all embedded devices require it, some can make do with just JFFS2, NFS, ramfs, etc - none of which require the block layer to be present. This patch does the following: (*) Introduces CONFIG_BLOCK to disable the block layer, buffering and blockdev support. (*) Adds dependencies on CONFIG_BLOCK to any configuration item that controls an item that uses the block layer. This includes: (*) Block I/O tracing. (*) Disk partition code. (*) All filesystems that are block based, eg: Ext3, ReiserFS, ISOFS. (*) The SCSI layer. As far as I can tell, even SCSI chardevs use the block layer to do scheduling. Some drivers that use SCSI facilities - such as USB storage - end up disabled indirectly from this. (*) Various block-based device drivers, such as IDE and the old CDROM drivers. (*) MTD blockdev handling and FTL. (*) JFFS - which uses set_bdev_super(), something it could avoid doing by taking a leaf out of JFFS2's book. (*) Makes most of the contents of linux/blkdev.h, linux/buffer_head.h and linux/elevator.h contingent on CONFIG_BLOCK being set. sector_div() is, however, still used in places, and so is still available. (*) Also made contingent are the contents of linux/mpage.h, linux/genhd.h and parts of linux/fs.h. (*) Makes a number of files in fs/ contingent on CONFIG_BLOCK. (*) Makes mm/bounce.c (bounce buffering) contingent on CONFIG_BLOCK. (*) set_page_dirty() doesn't call __set_page_dirty_buffers() if CONFIG_BLOCK is not enabled. (*) fs/no-block.c is created to hold out-of-line stubs and things that are required when CONFIG_BLOCK is not set: (*) Default blockdev file operations (to give error ENODEV on opening). (*) Makes some /proc changes: (*) /proc/devices does not list any blockdevs. (*) /proc/diskstats and /proc/partitions are contingent on CONFIG_BLOCK. (*) Makes some compat ioctl handling contingent on CONFIG_BLOCK. (*) If CONFIG_BLOCK is not defined, makes sys_quotactl() return -ENODEV if given command other than Q_SYNC or if a special device is specified. (*) In init/do_mounts.c, no reference is made to the blockdev routines if CONFIG_BLOCK is not defined. This does not prohibit NFS roots or JFFS2. (*) The bdflush, ioprio_set and ioprio_get syscalls can now be absent (return error ENOSYS by way of cond_syscall if so). (*) The seclvl_bd_claim() and seclvl_bd_release() security calls do nothing if CONFIG_BLOCK is not set, since they can't then happen. Signed-Off-By: NDavid Howells <dhowells@redhat.com> Signed-off-by: NJens Axboe <axboe@kernel.dk>
-
由 Martin Peschke 提交于
This patch kills a few lines of code in blktrace by making use of on_each_cpu(). Signed-off-by: NMartin Peschke <mp3@de.ibm.com> Signed-off-by: NJens Axboe <axboe@kernel.dk>
-
由 Oleg Nesterov 提交于
We don't need to disable irqs to clear current->io_context, it is protected by ->alloc_lock. Even IF it was possible to submit I/O from IRQ on behalf of current this irq_disable() can't help: current_io_context() will re-instantiate ->io_context after irq_enable(). We don't need task_lock() or local_irq_disable() to clear ioc->task. This can't prevent other CPUs from playing with our io_context anyway. Signed-off-by: NOleg Nesterov <oleg@tv-sign.ru> Signed-off-by: NJens Axboe <axboe@kernel.dk>
-
由 Jens Axboe 提交于
Signed-off-by: NJens Axboe <axboe@suse.de>
-
由 Jens Axboe 提交于
Give meta data reads preference over regular reads, as the process often needs to get that out of the way to do the io it was actually interested in. Signed-off-by: NJens Axboe <axboe@suse.de>
-
由 Jens Axboe 提交于
We can use this information for making more intelligent priority decisions, and it will also be useful for blktrace. Signed-off-by: NJens Axboe <axboe@suse.de>
-
由 Jens Axboe 提交于
It can make sense to set read-ahead larger than a single request. We should not be enforcing such policy on the user. Additionally, using the BLKRASET ioctl doesn't impose such a restriction. So additionally we now expose identical behaviour through the two. Issue also reported by Anton <cbou@mail.ru> Signed-off-by: NJens Axboe <axboe@suse.de>
-
由 Jens Axboe 提交于
Don't touch the current queues, just make sure that the wanted queue is selected next. Simplifies the logic. Signed-off-by: NJens Axboe <axboe@suse.de>
-
由 Jens Axboe 提交于
CFQ implements this on its own now, but it's really block layer knowledge. Tells a device queue to start dispatching requests to the driver, taking care to unplug if needed. Also fixes the issue where as/cfq will invoke a stopped queue, which we really don't want. Signed-off-by: NJens Axboe <axboe@suse.de>
-
由 Jens Axboe 提交于
No point in having a place holder list just for empty queues, so remove it. It's not used for anything other than to keep ->cfq_list busy. Signed-off-by: NJens Axboe <axboe@suse.de>
-
由 Jens Axboe 提交于
Currently it scales with number of processes in that priority group, which is potentially not very nice as it's called quite often. Basically we always need to do tail inserts, except for the case of a new process. So just mark/detect a queue as such. Signed-off-by: NJens Axboe <axboe@suse.de>
-
由 Jens Axboe 提交于
Some were kmalloc_node(), some were still kmalloc(). Change them all to kmalloc_node(). Signed-off-by: NJens Axboe <axboe@suse.de>
-
由 Jens Axboe 提交于
Kill a few inlines that bring in too much code to more than one location Shrinks kernel text by about 300 bytes on 32-bit x86. Signed-off-by: NJens Axboe <axboe@suse.de>
-
由 Jens Axboe 提交于
It's ok if the read path is a lot more costly, as long as inc/dec is really cheap. The inc/dec will happen for each created/freed io context, while the reading only happens when a disk queue exits. Signed-off-by: NJens Axboe <axboe@suse.de>
-
由 Jens Axboe 提交于
It's ok if the read path is a lot more costly, as long as inc/dec is really cheap. The inc/dec will happen for each created/freed io context, while the reading only happens when a disk queue exits. Signed-off-by: NJens Axboe <axboe@suse.de>
-
由 Jens Axboe 提交于
cfq_exit_lock is protecting two things now: - The per-ioc rbtree of cfq_io_contexts - The per-cfqd linked list of cfq_io_contexts The per-cfqd linked list can be protected by the queue lock, as it is (by definition) per cfqd as the queue lock is. The per-ioc rbtree is mainly used and updated by the process itself only. The only outside use is the io priority changing. If we move the priority changing to not browsing the rbtree, we can remove any locking from the rbtree updates and lookup completely. Let the sys_ioprio syscall just mark processes as having the iopriority changed and lazily update the private cfq io contexts the next time io is queued, and we can remove this locking as well. Signed-off-by: NJens Axboe <axboe@suse.de>
-
由 Jens Axboe 提交于
A collection of little fixes and cleanups: - We don't use the 'queued' sysfs exported attribute, since the may_queue() logic was rewritten. So kill it. - Remove dead defines. - cfq_set_active_queue() can be rewritten cleaner with else if conditions. - Several places had cfq_exit_cfqq() like logic, abstract that out and use that. - Annotate the cfqq kmem_cache_alloc() so the allocator knows that this is a repeat allocation if it fails with __GFP_WAIT set. Allows the allocator to start freeing some memory, if needed. CFQ already loops for this condition, so might as well pass the hint down. - Remove cfqd->rq_starved logic. It's not needed anymore after we dropped the crq allocation in cfq_set_request(). - Remove uneeded parameter passing. Signed-off-by: NJens Axboe <axboe@suse.de>
-
由 Jens Axboe 提交于
- Don't assign variables that are only used once. - Kill spin_lock() prefetching, it's opportunistic at best. Signed-off-by: NJens Axboe <axboe@suse.de>
-
由 Jens Axboe 提交于
It's not needed for anything, so kill the bio passing. Signed-off-by: NJens Axboe <axboe@suse.de>
-
由 Jens Axboe 提交于
After Christophs SCSI change, the only usage left is RQ_ACTIVE and RQ_INACTIVE. The block layer sets RQ_INACTIVE right before freeing the request, so any check for RQ_INACTIVE in a driver is a bug and indicates use-after-free. So kill/clean the remaining users, straight forward. Signed-off-by: NJens Axboe <axboe@suse.de>
-
由 Jens Axboe 提交于
It is always identical to &q->rq, and we only use it for detecting whether this request came out of our mempool or not. So replace it with an additional ->flags bit flag. Signed-off-by: NJens Axboe <axboe@suse.de>
-
由 Jens Axboe 提交于
As the comments indicates in blkdev.h, we can fold it into ->end_io_data usage as that is really what ->waiting is. Fixup the users of blk_end_sync_rq(). Signed-off-by: NJens Axboe <axboe@kernel.dk>
-
由 Jens Axboe 提交于
Get rid of the as_rq request type. With the added elevator_private2, we have enough room in struct request to get rid of any arq allocation/free for each request. Signed-off-by: NJens Axboe <axboe@suse.de> Signed-off-by: NNick Piggin <npiggin@suse.de>
-
由 Jens Axboe 提交于
Get rid of the cfq_rq request type. With the added elevator_private2, we have enough room in struct request to get rid of any crq allocation/free for each request. Signed-off-by: NJens Axboe <axboe@suse.de>
-
由 Jens Axboe 提交于
There's just one flag currently (SYNC), and that one can be grabbed from the request. Signed-off-by: NJens Axboe <axboe@suse.de>
-
由 Jens Axboe 提交于
A big win, we now save an allocation/free on each request! With the previous rb/hash abstractions, we can just reuse queuelist/donelist for the FIFO data and be done with it. Signed-off-by: NJens Axboe <axboe@suse.de>
-
由 Jens Axboe 提交于
We can track this in struct request. Signed-off-by: NJens Axboe <axboe@suse.de> Signed-off-by: NNick Piggin <npiggin@suse.de>
-
由 Jens Axboe 提交于
Saves some space in arq. Signed-off-by: NJens Axboe <axboe@suse.de> Signed-off-by: NNick Piggin <npiggin@suse.de>
-
由 Jens Axboe 提交于
Signed-off-by: NJens Axboe <axboe@suse.de>
-
由 Jens Axboe 提交于
This removes the rbtree handling from deadline. Signed-off-by: NJens Axboe <axboe@suse.de>
-
由 Jens Axboe 提交于
This removes the rbtree handling from CFQ. Signed-off-by: NJens Axboe <axboe@suse.de>
-
由 Jens Axboe 提交于
This removes the rbtree handling from AS. Signed-off-by: NJens Axboe <axboe@suse.de> Signed-off-by: NNick Piggin <npiggin@suse.de>
-