[lvm-devel] LVM2 doc/example.conf lib/metadata/metadata.c ...
agk at sourceware.org
agk at sourceware.org
Fri Sep 19 05:33:38 UTC 2008
CVSROOT: /cvs/lvm2
Module name: LVM2
Changes by: agk at sourceware.org 2008-09-19 05:33:37
Modified files:
doc : example.conf
lib/metadata : metadata.c
lib/config : defaults.h
. : WHATS_NEW
Log message:
Add device/md_chunk_alignment to lvm.conf
Patches:
http://sourceware.org/cgi-bin/cvsweb.cgi/LVM2/doc/example.conf.diff?cvsroot=lvm2&r1=1.36&r2=1.37
http://sourceware.org/cgi-bin/cvsweb.cgi/LVM2/lib/metadata/metadata.c.diff?cvsroot=lvm2&r1=1.189&r2=1.190
http://sourceware.org/cgi-bin/cvsweb.cgi/LVM2/lib/config/defaults.h.diff?cvsroot=lvm2&r1=1.42&r2=1.43
http://sourceware.org/cgi-bin/cvsweb.cgi/LVM2/WHATS_NEW.diff?cvsroot=lvm2&r1=1.958&r2=1.959
--- LVM2/doc/example.conf 2008/04/10 18:50:37 1.36
+++ LVM2/doc/example.conf 2008/09/19 05:33:36 1.37
@@ -93,6 +93,11 @@
# 1 enables; 0 disables.
md_component_detection = 1
+ # By default, if a PV is placed directly upon an md device, LVM2
+ # will align its data blocks with the the chunk_size exposed in sysfs.
+ # 1 enables; 0 disables.
+ md_chunk_alignment = 1
+
# If, while scanning the system for PVs, LVM2 encounters a device-mapper
# device that has its I/O suspended, it waits for it to become accessible.
# Set this to 1 to skip such devices. This should only be needed
--- LVM2/lib/metadata/metadata.c 2008/09/19 05:19:09 1.189
+++ LVM2/lib/metadata/metadata.c 2008/09/19 05:33:36 1.190
@@ -27,6 +27,7 @@
#include "display.h"
#include "locking.h"
#include "archiver.h"
+#include "defaults.h"
#include <sys/param.h>
@@ -74,7 +75,9 @@
/*
* Align to chunk size of underlying md device if present
*/
- if (pv->dev)
+ if (pv->dev &&
+ find_config_tree_bool(pv->fmt->cmd, "devices/md_chunk_alignment",
+ DEFAULT_MD_CHUNK_ALIGNMENT))
pv->pe_align = MAX(pv->pe_align,
dev_md_chunk_size(pv->fmt->cmd->sysfs_dir,
pv->dev));
--- LVM2/lib/config/defaults.h 2008/06/24 22:48:53 1.42
+++ LVM2/lib/config/defaults.h 2008/09/19 05:33:37 1.43
@@ -32,6 +32,7 @@
#define DEFAULT_PROC_DIR "/proc"
#define DEFAULT_SYSFS_SCAN 1
#define DEFAULT_MD_COMPONENT_DETECTION 1
+#define DEFAULT_MD_CHUNK_ALIGNMENT 1
#define DEFAULT_IGNORE_SUSPENDED_DEVICES 1
#define DEFAULT_LOCK_DIR "/var/lock/lvm"
--- LVM2/WHATS_NEW 2008/09/19 05:19:08 1.958
+++ LVM2/WHATS_NEW 2008/09/19 05:33:37 1.959
@@ -1,5 +1,6 @@
Version 2.02.40 -
================================
+ Add device/md_chunk_alignment to lvm.conf.
Pass struct physical_volume to pe_align and adjust for md chunk size.
Store sysfs location in struct cmd_context.
Avoid shuffling remaining mirror images when removing one, retaining primary.
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