Kent Overstreet
4f024f3797
block: Abstract out bvec iterator
...
Immutable biovecs are going to require an explicit iterator. To
implement immutable bvecs, a later patch is going to add a bi_bvec_done
member to this struct; for now, this patch effectively just renames
things.
Signed-off-by: Kent Overstreet <kmo@daterainc.com >
Cc: Jens Axboe <axboe@kernel.dk >
Cc: Geert Uytterhoeven <geert@linux-m68k.org >
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org >
Cc: Paul Mackerras <paulus@samba.org >
Cc: "Ed L. Cashin" <ecashin@coraid.com >
Cc: Nick Piggin <npiggin@kernel.dk >
Cc: Lars Ellenberg <drbd-dev@lists.linbit.com >
Cc: Jiri Kosina <jkosina@suse.cz >
Cc: Matthew Wilcox <willy@linux.intel.com >
Cc: Geoff Levand <geoff@infradead.org >
Cc: Yehuda Sadeh <yehuda@inktank.com >
Cc: Sage Weil <sage@inktank.com >
Cc: Alex Elder <elder@inktank.com >
Cc: ceph-devel@vger.kernel.org
Cc: Joshua Morris <josh.h.morris@us.ibm.com >
Cc: Philip Kelleher <pjk1939@linux.vnet.ibm.com >
Cc: Rusty Russell <rusty@rustcorp.com.au >
Cc: "Michael S. Tsirkin" <mst@redhat.com >
Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com >
Cc: Jeremy Fitzhardinge <jeremy@goop.org >
Cc: Neil Brown <neilb@suse.de >
Cc: Alasdair Kergon <agk@redhat.com >
Cc: Mike Snitzer <snitzer@redhat.com >
Cc: dm-devel@redhat.com
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com >
Cc: Heiko Carstens <heiko.carstens@de.ibm.com >
Cc: linux390@de.ibm.com
Cc: Boaz Harrosh <bharrosh@panasas.com >
Cc: Benny Halevy <bhalevy@tonian.com >
Cc: "James E.J. Bottomley" <JBottomley@parallels.com >
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org >
Cc: "Nicholas A. Bellinger" <nab@linux-iscsi.org >
Cc: Alexander Viro <viro@zeniv.linux.org.uk >
Cc: Chris Mason <chris.mason@fusionio.com >
Cc: "Theodore Ts'o" <tytso@mit.edu >
Cc: Andreas Dilger <adilger.kernel@dilger.ca >
Cc: Jaegeuk Kim <jaegeuk.kim@samsung.com >
Cc: Steven Whitehouse <swhiteho@redhat.com >
Cc: Dave Kleikamp <shaggy@kernel.org >
Cc: Joern Engel <joern@logfs.org >
Cc: Prasad Joshi <prasadjoshi.linux@gmail.com >
Cc: Trond Myklebust <Trond.Myklebust@netapp.com >
Cc: KONISHI Ryusuke <konishi.ryusuke@lab.ntt.co.jp >
Cc: Mark Fasheh <mfasheh@suse.com >
Cc: Joel Becker <jlbec@evilplan.org >
Cc: Ben Myers <bpm@sgi.com >
Cc: xfs@oss.sgi.com
Cc: Steven Rostedt <rostedt@goodmis.org >
Cc: Frederic Weisbecker <fweisbec@gmail.com >
Cc: Ingo Molnar <mingo@redhat.com >
Cc: Len Brown <len.brown@intel.com >
Cc: Pavel Machek <pavel@ucw.cz >
Cc: "Rafael J. Wysocki" <rjw@sisk.pl >
Cc: Herton Ronaldo Krzesinski <herton.krzesinski@canonical.com >
Cc: Ben Hutchings <ben@decadent.org.uk >
Cc: Andrew Morton <akpm@linux-foundation.org >
Cc: Guo Chao <yan@linux.vnet.ibm.com >
Cc: Tejun Heo <tj@kernel.org >
Cc: Asai Thambi S P <asamymuthupa@micron.com >
Cc: Selvan Mani <smani@micron.com >
Cc: Sam Bradshaw <sbradshaw@micron.com >
Cc: Wei Yongjun <yongjun_wei@trendmicro.com.cn >
Cc: "Roger Pau Monné" <roger.pau@citrix.com >
Cc: Jan Beulich <jbeulich@suse.com >
Cc: Stefano Stabellini <stefano.stabellini@eu.citrix.com >
Cc: Ian Campbell <Ian.Campbell@citrix.com >
Cc: Sebastian Ott <sebott@linux.vnet.ibm.com >
Cc: Christian Borntraeger <borntraeger@de.ibm.com >
Cc: Minchan Kim <minchan@kernel.org >
Cc: Jiang Liu <jiang.liu@huawei.com >
Cc: Nitin Gupta <ngupta@vflare.org >
Cc: Jerome Marchand <jmarchand@redhat.com >
Cc: Joe Perches <joe@perches.com >
Cc: Peng Tao <tao.peng@emc.com >
Cc: Andy Adamson <andros@netapp.com >
Cc: fanchaoting <fanchaoting@cn.fujitsu.com >
Cc: Jie Liu <jeff.liu@oracle.com >
Cc: Sunil Mushran <sunil.mushran@gmail.com >
Cc: "Martin K. Petersen" <martin.petersen@oracle.com >
Cc: Namjae Jeon <namjae.jeon@samsung.com >
Cc: Pankaj Kumar <pankaj.km@samsung.com >
Cc: Dan Magenheimer <dan.magenheimer@oracle.com >
Cc: Mel Gorman <mgorman@suse.de >6
2013-11-23 22:33:47 -08:00
Kent Overstreet
c4d951ddb6
bcache: Fix sysfs splat on shutdown with flash only devs
...
Whoops.
Signed-off-by: Kent Overstreet <kmo@daterainc.com >
2013-11-10 21:56:41 -08:00
Kent Overstreet
48a915a87f
bcache: Better full stripe scanning
...
The old scanning-by-stripe code burned too much CPU, this should be
better.
Signed-off-by: Kent Overstreet <kmo@daterainc.com >
2013-11-10 21:56:41 -08:00
Kent Overstreet
5e6926daac
bcache: Convert writeback to a kthread
...
This simplifies the writeback flow control quite a bit - previously, it
was conceptually two coroutines, refill_dirty() and read_dirty(). This
makes the code quite a bit more straightforward.
Signed-off-by: Kent Overstreet <kmo@daterainc.com >
2013-11-10 21:56:05 -08:00
Kent Overstreet
2d679fc756
bcache: Stripe size isn't necessarily a power of two
...
Originally I got this right... except that the divides didn't use
do_div(), which broke 32 bit kernels. When I went to fix that, I forgot
that the raid stripe size usually isn't a power of two... doh
Signed-off-by: Kent Overstreet <kmo@daterainc.com >
2013-11-10 21:55:55 -08:00
Kent Overstreet
72c270612b
bcache: Write out full stripes
...
Now that we're tracking dirty data per stripe, we can add two
optimizations for raid5/6:
* If a stripe is already dirty, force writes to that stripe to
writeback mode - to help build up full stripes of dirty data
* When flushing dirty data, preferentially write out full stripes first
if there are any.
Signed-off-by: Kent Overstreet <koverstreet@google.com >
2013-06-26 21:58:04 -07:00
Kent Overstreet
279afbad4e
bcache: Track dirty data by stripe
...
To make background writeback aware of raid5/6 stripes, we first need to
track the amount of dirty data within each stripe - we do this by
breaking up the existing sectors_dirty into per stripe atomic_ts
Signed-off-by: Kent Overstreet <koverstreet@google.com >
2013-06-26 21:57:23 -07:00
