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* block: Track DISCARD statistics and output them in stat and diskstatMichael Callahan2018-07-181-0/+15
| | | | | | | | | | | | | | | | | | | | | | Add tracking of REQ_OP_DISCARD ios to the partition statistics and append them to the various stat files in /sys as well as /proc/diskstats. These are tracked with the same four stats as reads and writes: Number of discard ios completed. Number of discard ios merged Number of discard sectors completed Milliseconds spent on discard requests This is done via adding a new STAT_DISCARD define to genhd.h and then using it to index that stat field for discard requests. tj: Refreshed on top of v4.17 and other previous updates. Signed-off-by: Michael Callahan <michaelcallahan@fb.com> Signed-off-by: Tejun Heo <tj@kernel.org> Cc: Andy Newell <newella@fb.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
* iostats.txt: update it to cover recent KernelsMauro Carvalho Chehab2017-07-141-22/+22
| | | | | | | | | | Everything there that it is said for 2.6 also applies on current 4.x Kernels. So, update the information there. While here, use ``foo`` for literals. Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com> Signed-off-by: Jonathan Corbet <corbet@lwn.net>
* iostats.txt: standardize document formatMauro Carvalho Chehab2017-07-141-13/+27
| | | | | | | | | | | | | | | Each text file under Documentation follows a different format. Some doesn't even have titles! Change its representation to follow the adopted standard, using ReST markups for it to be parseable by Sphinx: - promote main title level; - mark literal blocks as such; - Add blank lines to avoid Sphinx errors. Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com> Signed-off-by: Jonathan Corbet <corbet@lwn.net>
* iostats.txt: add easy-to-find description for field 6David P Hilton2013-04-291-0/+2
| | | | | | | | | iostats.txt has a merged description of fields 2 and 6, but it's not obvious. This patch adds a field 6, pointing to the merged description of field 6 in field 2. Signed-off-by: David Hilton <david.hilton.p@gmail.com> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
* Documentation/iostats.txt: bit-size reference etc.Randy Dunlap2011-03-231-9/+8
| | | | | | | | | | | | - correction that disk stats values are native-word-sized 32-bit or 64-bit values, not always 32-bi values - drop "Last modified" entry; use git for that - fix a few typos - change "cpu" to "CPU" Reported-by: Linda Walsh <lkml@tlinx.org> Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com> Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
* remove extraneous 'is' from Documentation/iostats.txtJim Cromie2011-01-031-1/+1
| | | | | | | fix "is increases", drop "is" Signed-off-by: Jim Cromie <jim.cromie@gmail.com> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
* Documentation cleanup: trivial misspelling, punctuation, and grammar ↵Matt LaPlante2008-07-261-1/+1
| | | | | | | | corrections. Cc: Randy Dunlap <randy.dunlap@oracle.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* Enhanced partition statistics: documentation updateJerome Marchand2008-02-081-1/+14
| | | | | | | Update the documentation to reflect the change in userspace interface. Signed-off-by: Jerome Marchand <jmarchan@redhat.com> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
* [BLOCK] Get rid of request_queue_t typedefJens Axboe2007-07-241-1/+1
| | | | | | | | | 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: Jens Axboe <jens.axboe@oracle.com>
* Linux-2.6.12-rc2v2.6.12-rc2Linus Torvalds2005-04-171-0/+150
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!