[RFC PATCH] Block device bio throttling support [V2]

Hi, This is V2 of the bio throttling patches. Following are changes since V1. - Move throttling hook point from __make_request() to __generic_make_request(). This will make sure that now throttling will work any block device which instanciated a ...

Message posted on the September 7th, 2010 - 5:00 PM ET

[RFC PATCH] Block device bio throttling support [V3]

Hi, This is V3 of the bio throttling patches. Following are changes since V2. - Added the support for throttling in terms of IOPS (READ/WRITE). If one specifies both bandwidth as well as IOPS rules on a device then IO is subjected to both the ...

Message posted on the September 15th, 2010 - 5:10 PM ET

[RFC PATCH] block: Change default IO scheduler to deadline except SATA

Hi, I am wondering if CFQ as default scheduler is still the right choice. CFQ generally works well on slow rotational media (SATA?). But often underperforms on faster storage (storage arrays, PCIE SSDs, virtualized disk in linux guests etc). People ...

Message posted on the April 10th, 2012 - 9:40 AM ET

[RFC PATCH] block: Add new generic block device naming interface

From: Stephen M. Cameron <scameron@beardog.cce.hp.com> Currently, when adding a new block device driver, if grub support is needed, then grub needs to be modified to know about this new driver. See this thread: ...

Message posted on the April 25th, 2013 - 4:30 PM ET

[RFC patch] block: add round robin dispatch in noop IO scheduler

Requests are grouped according to IO context, and dispatched in round robin, one request per context a time, then noop serves flash based disk "fair"? a/block/noop-iosched.c Wed Jun 27 20:52:52 2012 +++ b/block/noop-iosched.c Wed Jun 27 ...

Message posted on the June 27th, 2012 - 10:00 AM ET

[RFC PATCH] block: change max_segments default to USHRT_MAX

The reported problem was that a DM multipath device's max_segemnts was constrained to BLK_MAX_SEGMENTS (128) even though the underlying paths' max_segments were larger. For example, SCSI establishes a max_segments of SCSI_MAX_SG_CHAIN_SEGMENTS ...

Message posted on the November 28th, 2011 - 5:10 PM ET

[RFC PATCH] block: all callers should check blkdev_issue_flush's return

It is concerning that a FLUSH may fail but the blkdev_issue_flush callers assume it will always succeed. Each blkdev_issue_flush caller should come to terms with the reality that a FLUSH may fail -- the file_operations' .fsync methods in ...

Message posted on the June 26th, 2012 - 11:30 AM ET

[RFC][PATCH] direct-io: btrfs: avoid splitting dio requests for non-btrfs filesystems

Hi, this is about an issue newer kernels show, bysplitting direct I/O requests into 4k pieces to directly merge them in the Block Device Layer afterwards. If anyone is interested in own tests just use a simple command like dd if=/mnt/test/test-dd1 ...

Message posted on the November 2nd, 2010 - 7:20 AM ET

[RFC][PATCH 0/7] UBI checkpointing support

The following patch set implements checkpointing support for UBI. Checkpointing is an optional feature which stores the physical to logical eraseblock relations in a checkpointing superblock to reduce the initialization time of UBI. The current init ...

Message posted on the February 14th, 2012 - 4:00 PM ET

[RFC PATCH v5 00/19] memory-hotplug: hot-remove physical memory

This patch series aims to support physical memory hot-remove. The patches can free/remove following things: - acpi_memory_info : [RFC PATCH 4/19] - /sys/firmware/memmap/X/{end, start, type} : [RFC PATCH 8/19] - ...

Message posted on the July 27th, 2012 - 6:20 AM ET

[RFC PATCH V6 00/19] memory-hotplug: hot-remove physical memory

From: Wen Congyang <wency@cn.fujitsu.com> This patch series aims to support physical memory hot-remove. The patches can free/remove following things: - acpi_memory_info : [RFC PATCH 4/19] - ...

Message posted on the August 3rd, 2012 - 3:50 AM ET

[RFC PATCH v4 0/13] memory-hotplug : hot-remove physical memory

This patch series aims to support physical memory hot-remove. [RFC PATCH v4 1/13] memory-hotplug : rename remove_memory to offline_memory [RFC PATCH v4 2/13] memory-hotplug : add physical memory hotplug code to acpi_memory_device_remove [RFC PATCH ...

Message posted on the July 18th, 2012 - 6:10 AM ET

[RFC PATCH v3 0/13] memory-hotplug : hot-remove physical memory

This patch series aims to support physical memory hot-remove. [RFC PATCH v3 1/13] memory-hotplug : rename remove_memory to offline_memory [RFC PATCH v3 2/13] memory-hotplug : add physical memory hotplug code to acpi_memory_device_remove [RFC PATCH ...

Message posted on the July 9th, 2012 - 6:30 AM ET

[RFC PATCH v2 0/13] memory-hotplug : hot-remove physical memory

This patch series aims to support physical memory hot-remove. [RFC PATCH v2 1/13] memory-hotplug : rename remove_memory to offline_memory [RFC PATCH v2 2/13] memory-hotplug : add physical memory hotplug code to acpi_memory_device_remove [RFC PATCH ...

Message posted on the July 3rd, 2012 - 2:00 AM ET

rfc patch block