kernel/linux.git/drivers/block/Kconfig, branch v4.11.5

virtio_blk: make SCSI passthrough support configurable

2017-01-31T17:53:10+00:00

The SCSI passthrough idea was a a bad idea to start with (guess who came up with it?), and has been removed from the virtio 1.O spec, and is not enabled by defauly by any host I know of. Add a separate config option for it so that we don't need to enable it for most setups. That way any bugs related to it (like the one recently fixed for vmapped stacks) do not affect other users, and the size of the virtblk_req structure also shrinks significantly. Signed-off-by: Christoph Hellwig Signed-off-by: Jens Axboe

block: make scsi_request and scsi ioctl support optional

2017-01-31T17:53:05+00:00

We only need this code to support scsi, ide, cciss and virtio. And at least for virtio it's a deprecated feature to start with. This should shrink the kernel size for embedded device that only use, say eMMC a bit. Signed-off-by: Christoph Hellwig Signed-off-by: Jens Axboe

pktcdvd: mark as unmaintained and deprecated

2016-11-21T16:33:17+00:00

This driver is both orphaned, and not really useful anymore. Mark it as such, and remove it in a future kernel after a release or two. Signed-off-by: Jens Axboe

cpqarray: remove it from the kernel

2016-03-14T15:06:01+00:00

We disabled the ability to enable this driver back in October of 2013, we should be able to safely remove it at this point. The initial goal was to remove it in 3.15, so now is the time. Signed-off-by: Jens Axboe

nvme: move to a new drivers/nvme/host directory

2015-10-09T16:40:37+00:00

This patch moves the NVMe driver from drivers/block/ to its own new drivers/nvme/host/ directory. This is in preparation of splitting the current monolithic driver up and add support for the upcoming NVMe over Fabrics standard. The drivers/nvme/host/ is chose to leave space for a NVMe target implementation in addition to this host side driver. Signed-off-by: Jay Sternberg [hch: rebased, renamed core.c to pci.c, slight tweaks] Signed-off-by: Christoph Hellwig Acked-by: Keith Busch Signed-off-by: Jens Axboe

libnvdimm, pmem: move pmem to drivers/nvdimm/

2015-06-25T01:24:10+00:00

Prepare the pmem driver to consume PMEM namespaces emitted by regions of an nvdimm_bus instance. No functional change. Acked-by: Christoph Hellwig Tested-by: Toshi Kani Signed-off-by: Dan Williams

drivers/block/pmem: Add a driver for persistent memory

2015-04-01T15:03:56+00:00

PMEM is a new driver that presents a reserved range of memory as a block device. This is useful for developing with NV-DIMMs, and can be used with volatile memory as a development platform. This patch contains the initial driver from Ross Zwisler, with various changes: converted it to use a platform_device for discovery, fixed partition support and merged various patches from Boaz Harrosh. Tested-by: Ross Zwisler Signed-off-by: Ross Zwisler Signed-off-by: Christoph Hellwig Acked-by: Dan Williams Cc: Andrew Morton Cc: Andy Lutomirski Cc: Boaz Harrosh Cc: Borislav Petkov Cc: H. Peter Anvin Cc: Jens Axboe Cc: Jens Axboe Cc: Keith Busch Cc: Linus Torvalds Cc: Matthew Wilcox Cc: Thomas Gleixner Cc: linux-nvdimm@ml01.01.org Link: http://lkml.kernel.org/r/1427872339-6688-3-git-send-email-hch@lst.de [ Minor cleanups. ] Signed-off-by: Ingo Molnar

brd: rename XIP to DAX

2015-02-17T01:56:04+00:00

Since this is relating to FS_XIP, not KERNEL_XIP, it should be called DAX instead of XIP. Signed-off-by: Matthew Wilcox Cc: Andreas Dilger Cc: Boaz Harrosh Cc: Christoph Hellwig Cc: Dave Chinner Cc: Jan Kara Cc: Jens Axboe Cc: Kirill A. Shutemov Cc: Mathieu Desnoyers Cc: Randy Dunlap Cc: Ross Zwisler Cc: Theodore Ts'o Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

zram: promote zram from staging

2014-01-31T00:56:55+00:00

Zram has lived in staging for a LONG LONG time and have been fixed/improved by many contributors so code is clean and stable now. Of course, there are lots of product using zram in real practice. The major TV companys have used zram as swap since two years ago and recently our production team released android smart phone with zram which is used as swap, too and recently Android Kitkat start to use zram for small memory smart phone. And there was a report Google released their ChromeOS with zram, too and cyanogenmod have been used zram long time ago. And I heard some disto have used zram block device for tmpfs. In addition, I saw many report from many other peoples. For example, Lubuntu start to use it. The benefit of zram is very clear. With my experience, one of the benefit was to remove jitter of video application with backgroud memory pressure. It would be effect of efficient memory usage by compression but more issue is whether swap is there or not in the system. Recent mobile platforms have used JAVA so there are many anonymous pages. But embedded system normally are reluctant to use eMMC or SDCard as swap because there is wear-leveling and latency issues so if we do not use swap, it means we can't reclaim anoymous pages and at last, we could encounter OOM kill. :( Although we have real storage as swap, it was a problem, too. Because it sometime ends up making system very unresponsible caused by slow swap storage performance. Quote from Luigi on Google "Since Chrome OS was mentioned: the main reason why we don't use swap to a disk (rotating or SSD) is because it doesn't degrade gracefully and leads to a bad interactive experience. Generally we prefer to manage RAM at a higher level, by transparently killing and restarting processes. But we noticed that zram is fast enough to be competitive with the latter, and it lets us make more efficient use of the available RAM. " and he announced. http://www.spinics.net/lists/linux-mm/msg57717.html Other uses case is to use zram for block device. Zram is block device so anyone can format the block device and mount on it so some guys on the internet start zram as /var/tmp. http://forums.gentoo.org/viewtopic-t-838198-start-0.html Let's promote zram and enhance/maintain it instead of removing. Signed-off-by: Minchan Kim Reviewed-by: Konrad Rzeszutek Wilk Acked-by: Nitin Gupta Acked-by: Pekka Enberg Cc: Bob Liu Cc: Greg Kroah-Hartman Cc: Hugh Dickins Cc: Jens Axboe Cc: Luigi Semenzato Cc: Mel Gorman Cc: Rik van Riel Cc: Seth Jennings Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

drivers/block/Kconfig: update RAM block device module name

2014-01-24T00:36:53+00:00

RAM block device support module name changed to brd.ko some years ago with an "rd" alias to match previous module implementation. This patch updates its Kconfig definition. Signed-off-by: Fabian Frederick Acked-by: Randy Dunlap Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds