- 09 10月, 2008 1 次提交
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由 Aaron Carroll 提交于
Deadline currently only batches sector-contiguous requests, so except for a few circumstances (e.g. requests in a single direction), it is essentially first come first served. This is bad for throughput, so change it to CSCAN, which means requests in a batch do not need to be sequential and are issued in increasing sector order. Signed-off-by: NAaron Carroll <aaronc@gelato.unsw.edu.au> Signed-off-by: NJens Axboe <jens.axboe@oracle.com>
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- 18 12月, 2007 1 次提交
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由 Adrian Bunk 提交于
elv_register() always returns 0, and there isn't anything it does where it should return an error (the only error condition is so grave that it's handled with a BUG_ON). Signed-off-by: NAdrian Bunk <bunk@kernel.org> Signed-off-by: NJens Axboe <jens.axboe@oracle.com>
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- 02 11月, 2007 3 次提交
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由 Aaron Carroll 提交于
After switching data directions, deadline always starts the next batch from the lowest-sector request. This gives excessive deadline expiries and large latency and throughput disparity between high- and low-sector requests; an order of magnitude in some tests. This patch changes the batching behaviour so new batches start from the request whose expiry is earliest. Signed-off-by: NAaron Carroll <aaronc@gelato.unsw.edu.au> Signed-off-by: NJens Axboe <jens.axboe@oracle.com>
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由 Aaron Carroll 提交于
The deadline I/O scheduler does not reset the batch count when starting a new batch at a higher-sectored request. This means the second and subsequent batch in the same data direction will never exceed a single request in size whenever higher-sectored requests are pending. This patch gives new batches in the same data direction as old ones their full quota of requests by resetting the batch count. Signed-off-by: NAaron Carroll <aaronc@gelato.unsw.edu.au> Signed-off-by: NJens Axboe <jens.axboe@oracle.com>
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由 Aaron Carroll 提交于
Factor finding the next request in sector-sorted order into a function deadline_latter_request. Signed-off-by: NAaron Carroll <aaronc@gelato.unsw.edu.au> Signed-off-by: NJens Axboe <jens.axboe@oracle.com>
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- 24 7月, 2007 1 次提交
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由 Jens Axboe 提交于
Some of the code has been gradually transitioned to using the proper struct request_queue, but there's lots left. So do a full sweet of the kernel and get rid of this typedef and replace its uses with the proper type. Signed-off-by: NJens Axboe <jens.axboe@oracle.com>
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- 18 7月, 2007 1 次提交
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由 Christoph Lameter 提交于
kmalloc_node() and kmem_cache_alloc_node() were not available in a zeroing variant in the past. But with __GFP_ZERO it is possible now to do zeroing while allocating. Use __GFP_ZERO to remove the explicit clearing of memory via memset whereever we can. Signed-off-by: NChristoph Lameter <clameter@sgi.com> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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- 01 12月, 2006 1 次提交
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由 Jens Axboe 提交于
- ->init_queue() does not need the elevator passed in - ->put_request() is a hot path and need not have the queue passed in - cfq_update_io_seektime() does not need cfqd passed in Signed-off-by: NJens Axboe <jens.axboe@oracle.com>
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- 01 10月, 2006 4 次提交
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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>
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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>
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由 Jens Axboe 提交于
This removes the rbtree handling from deadline. Signed-off-by: NJens Axboe <axboe@suse.de>
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由 Jens Axboe 提交于
Right now, every IO scheduler implements its own backmerging (except for noop, which does no merging). That results in duplicated code for essentially the same operation, which is never a good thing. This patch moves the backmerging out of the io schedulers and into the elevator core. We save 1.6kb of text and as a bonus get backmerging for noop as well. Win-win! Signed-off-by: NJens Axboe <axboe@suse.de>
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- 01 7月, 2006 1 次提交
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由 Jörn Engel 提交于
Signed-off-by: NJörn Engel <joern@wohnheim.fh-wedel.de> Signed-off-by: NAdrian Bunk <bunk@stusta.de>
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- 23 6月, 2006 2 次提交
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由 Jens Axboe 提交于
They all duplicate macros to check for empty root and/or node, and clearing a node. So put those in rbtree.h. Signed-off-by: NJens Axboe <axboe@suse.de>
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由 Akinobu Mita 提交于
Use hlist instead of list_head for request hashtable in deadline-iosched and as-iosched. It also can remove the flag to know hashed or unhashed. Signed-off-by: NAkinobu Mita <mita@miraclelinux.com> Signed-off-by: NJens Axboe <axboe@suse.de> block/as-iosched.c | 45 +++++++++++++++++++-------------------------- block/deadline-iosched.c | 39 ++++++++++++++++----------------------- 2 files changed, 35 insertions(+), 49 deletions(-)
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- 09 6月, 2006 1 次提交
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由 Jens Axboe 提交于
There's a race between shutting down one io scheduler and firing up the next, in which a new io could enter and cause the io scheduler to be invoked with bad or NULL data. To fix this, we need to maintain the queue lock for a bit longer. Unfortunately we cannot do that, since the elevator init requires to be run without the lock held. This isn't easily fixable, without also changing the mempool API. So split the initialization into two parts, and alloc-init operation and an attach operation. Then we can preallocate the io scheduler and related structures, and run the attach inside the lock after we detach the old one. This patch has survived 30 minutes of 1 second io scheduler switching with a very busy io load. Signed-off-by: NJens Axboe <axboe@suse.de> Signed-off-by: NLinus Torvalds <torvalds@osdl.org>
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- 21 4月, 2006 1 次提交
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由 David Woodhouse 提交于
They were abusing the rb_color field to mark nodes which weren't currently on the tree. Fix that to use the same method as eventpoll did -- setting the parent pointer to point back to itself. And use the appropriate accessor macros for setting and reading the parent. Signed-off-by: NDavid Woodhouse <dwmw2@infradead.org>
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- 19 3月, 2006 2 次提交
- 06 1月, 2006 1 次提交
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由 Arjan van de Ven 提交于
the patch below marks various read-only variables in block/* as const, so that gcc can optimize the use of them; eg gcc will replace the use by the value directly now and will even remove the memory usage of these. Signed-off-by: NArjan van de Ven <arjan@infradead.org> Signed-off-by: NJens Axboe <axboe@suse.de>
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- 19 11月, 2005 1 次提交
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由 Coywolf Qi Hunt 提交于
Some leftover comments referring to drivers/block that are now block/. They don't add any information we don't already have, so kill them. Signed-off-by: NCoywolf Qi Hunt <qiyong@fc-cn.com> Signed-off-by: NJens Axboe <axboe@suse.de>
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- 04 11月, 2005 1 次提交
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由 Jens Axboe 提交于
drivers/block/ is right now a mix of core and driver parts. Lets move the core parts to a new top level directory. Al will move the fs/ related block parts to block/ next. Signed-off-by: NJens Axboe <axboe@suse.de>
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- 28 10月, 2005 3 次提交
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由 Al Viro 提交于
Signed-off-by: NAl Viro <viro@zeniv.linux.org.uk> Signed-off-by: NLinus Torvalds <torvalds@osdl.org>
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由 Tejun Heo 提交于
Remove last_merge handling from all ioscheds. This patch removes merging capability of noop iosched. Signed-off-by: NTejun Heo <htejun@gmail.com>
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由 Jens Axboe 提交于
This patch updates all four ioscheds to use generic dispatch queue. There's one behavior change in as-iosched. * In as-iosched, when force dispatching (ELEVATOR_INSERT_BACK), batch_data_dir is reset to REQ_SYNC and changed_batch and new_batch are cleared to zero. This prevernts AS from doing incorrect update_write_batch after the forced dispatched requests are finished. * In cfq-iosched, cfqd->rq_in_driver currently counts the number of activated (removed) requests to determine whether queue-kicking is needed and cfq_max_depth has been reached. With generic dispatch queue, I think counting the number of dispatched requests would be more appropriate. * cfq_max_depth can be lowered to 1 again. Original from Tejun Heo, modified version applied. Signed-off-by: NJens Axboe <axboe@suse.de>
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- 10 9月, 2005 1 次提交
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由 Andrew Morton 提交于
That ?: trick gives us the creeps. Cc: Jens Axboe <axboe@suse.de> Signed-off-by: NAndrew Morton <akpm@osdl.org> Signed-off-by: NLinus Torvalds <torvalds@osdl.org>
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- 08 9月, 2005 1 次提交
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由 Nikita Danilov 提交于
cleanup of deadline_dispatch_requests(): - replace drq selection with hopefully clearer while semantically the same construct: take write request, if there is any, otherwise take read one, or NULL if none exist. - kill unused other_dir. Signed-off-by: NNikita Danilov <nikita@clusterfs.com> Cc: Jens Axboe <axboe@suse.de> Signed-off-by: NAndrew Morton <akpm@osdl.org> Signed-off-by: NLinus Torvalds <torvalds@osdl.org>
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- 28 6月, 2005 1 次提交
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由 Jens Axboe 提交于
This updates the CFQ io scheduler to the new time sliced design (cfq v3). It provides full process fairness, while giving excellent aggregate system throughput even for many competing processes. It supports io priorities, either inherited from the cpu nice value or set directly with the ioprio_get/set syscalls. The latter closely mimic set/getpriority. This import is based on my latest from -mm. Signed-off-by: NJens Axboe <axboe@suse.de> Signed-off-by: NLinus Torvalds <torvalds@osdl.org>
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- 24 6月, 2005 1 次提交
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由 Christoph Lameter 提交于
Patch to allocate the control structures for for ide devices on the node of the device itself (for NUMA systems). The patch depends on the Slab API change patch by Manfred and me (in mm) and the pcidev_to_node patch that I posted today. Does some realignment too. Signed-off-by: NJustin M. Forbes <jmforbes@linuxtx.org> Signed-off-by: NChristoph Lameter <christoph@lameter.com> Signed-off-by: NPravin Shelar <pravin@calsoftinc.com> Signed-off-by: NShobhit Dayal <shobhit@calsoftinc.com> Signed-off-by: NAndrew Morton <akpm@osdl.org> Signed-off-by: NLinus Torvalds <torvalds@osdl.org>
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- 21 6月, 2005 1 次提交
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由 Dmitry Torokhov 提交于
sysfs: fix drivers/block so if an attribute doesn't implement show or store method read/write will return -EIO instead of 0 or -EINVAL. Signed-off-by: NDmitry Torokhov <dtor@mail.ru> Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>
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- 17 4月, 2005 1 次提交
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由 Linus Torvalds 提交于
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
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