linux-kernel - [PATCH 00/16] DRBD: a block device for HA clusters

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Date:	Fri, 15 May 2009 14:10:27 +0200
From:	Philipp Reisner <philipp.reisner@...bit.com>
To:	linux-kernel@...r.kernel.org
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	Jens Axboe <jens.axboe@...cle.com>, Greg KH <gregkh@...e.de>,
	Neil Brown <neilb@...e.de>,
	James Bottomley <James.Bottomley@...senPartnership.com>,
	Sam Ravnborg <sam@...nborg.org>, Dave Jones <davej@...hat.com>,
	Nikanth Karthikesan <knikanth@...e.de>,
	"Lars Marowsky-Bree" <lmb@...e.de>,
	"Nicholas A. Bellinger" <nab@...ux-iscsi.org>,
	Kyle Moffett <kyle@...fetthome.net>,
	Bart Van Assche <bart.vanassche@...il.com>,
	Lars Ellenberg <lars.ellenberg@...bit.com>,
	Philipp Reisner <philipp.reisner@...bit.com>
Subject: [PATCH 00/16] DRBD: a block device for HA clusters

Hi,

This is a repost of DRBD, to keep you updated about the ongoing
cleanups and improvements.

Patch set attached. Git tree available:
git pull git://git.drbd.org/linux-2.6-drbd.git drbd

We are looking for reviews!

Note for reviewers:

  Only the first two patches (major.h and lru_cache) are self contained.
  The other patches are just split at file boundaries. Sorry, DRBD
  was developed as out-of-tree modules just for too long.

Short Description

  DRBD is a shared-nothing, synchronously replicated block device. It
  is designed to serve as a building block for high availability
  clusters and in this context, is a "drop-in" replacement for shared
  storage. Simplistically, you could see it as a network RAID 1.

  More information can be found at http://www.drbd.org

Changes since 2009-04-30

  * Cleanup: Removed typecasts, more documentation in lru_cache. Moved to /lib
  * Cleanup: replaced __attribute__((packed)) with __packed
  * Cleanup: remove quite a few 'inline's from .c files
  * Cleanup: renaming a few constants: _SECT -> _SECTOR_SIZE, _SIZE_B -> _SHIFT ...
  * Cleanup: rename inc_local -> get_ldev; inc_net -> get_net_conf; and corresponding dec_* -> put_*
  * Cleanup: rename mdev->bc to mdev->ldev (to match the recent change to get_ldev/put_ldev)
  * Cleanup: Made function comments kernel-doc compliant
  * Cleanup: vmalloc() only as a fall back for kmalloc()
  * DRBD:    Allow detach of a SyncTarget node. (Bugz 221)
  * DRBD:    Call drbd_rs_cancel_all() and reset rs_pending when aborting resync due to detach. (Bugz 223)
  * DRBD:    make drbd thread t_lock irqsave - lockdep complained, and lockdep is right (theoretically)

Changes since 2009-04-10

  * Cleanup: Removed all CamelCase
  * Cleanup: Replaced DRBD's own tracing stuff with regular tracepoints
  * Cleanup: Removed ERR/INFO/ALERT ... macros, using dev_err/dev_info/... now
  * Cleanup: Minor stuff, as suggested in feedback on LKML
  * DRBD:    Bitmap compression feature was finalised
  * DRBD:    new disable_sendpage parameter

Changes since the post on 2009-03-30, all triggered by reviews

  * Improvements to Makefile and Kconfig
  * Simplified definitions of bm_flags' bitnumbers
  * Removed debugging aid

Changes since the post on 2009-03-23, from drbd-mainline

  * Updated to the final drbd-8.3.1 code
  * Optionally run-length encode bitmap transfers

Changes since the post on 2009-03-23, triggered by reviews

  * Using the latest proc_create() now
  * Moved the allocation of md_io_tmpp to attach/detach out of drbd_md_sync_page_io()
  * Removing the mode selection comments for emacs
  * Removed DRBD_ratelimit()

cheers,
  Phil
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