Accepting request 741452 from home:hmzhao:branches:openSUSE:Factory

- lvm2-pvscan needs process speed improvement on a large scale PVs (jcs#SLE-5498)
  + jcs-SLE5498_pvscan-allow-use-of-noudevsync-option.patch

OBS-URL: https://build.opensuse.org/request/show/741452
OBS-URL: https://build.opensuse.org/package/show/Base:System/lvm2?expand=0&rev=256

jcs-SLE5498_pvscan-allow-use-of-noudevsync-option.patch

@@ -0,0 +1,48 @@
+From 3e5e7fd6c93517278b2451a08f47e16d052babbb Mon Sep 17 00:00:00 2001
+From: David Teigland <teigland@redhat.com>
+Date: Tue, 10 Sep 2019 09:47:33 -0500
+Subject: [PATCH] pvscan: allow use of noudevsync option
+
+When pvscan is used to activate a VG via an
+asynchronous service (i.e. lvm2-pvscan), there
+is no requirement that the command wait for
+udev to create device nodes before returning.
+
+It's possible that waiting for udev is slow
+enough to cause the service running the command
+to time out.  So, allow the --noudevsync option
+to be given to pvscan to skip waiting for udev.
+
+(This commit is not changing the lvm2-pvscan
+service itself to use --noudevsync.)
+
+Still unknown is whether there are any complex
+LV activation cases in which lvm itself requires
+access to a device node, in which case the udev
+wait could be needed by lvm itself.
+
+(When running an activation command directly
+from the command line, it's generally expected
+that the activated LVs are ready to use when
+the command is finished, so lvm waits for
+udev to finish creating the dev nodes.)
+---
+ tools/command-lines.in | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/tools/command-lines.in b/tools/command-lines.in
+index 1169224792..65221c0d1a 100644
+--- a/tools/command-lines.in
++++ b/tools/command-lines.in
+@@ -1498,7 +1498,7 @@ DESC: Display PV information.
+ 
+ pvscan --cache_long
+ OO: --ignorelockingfailure, --reportformat ReportFmt,
+---activate ay, --major Number, --minor Number
++--activate ay, --major Number, --minor Number, --noudevsync
+ OP: PV|String ...
+ IO: --background
+ ID: pvscan_cache
+-- 
+2.21.0
+

lvm2.changes

@@ -1,3 +1,9 @@
+-------------------------------------------------------------------
+Mon Oct 21 07:59:33 UTC 2019 - heming.zhao@suse.com
+
+- lvm2-pvscan needs process speed improvement on a large scale PVs (jcs#SLE-5498)
+  + jcs-SLE5498_pvscan-allow-use-of-noudevsync-option.patch
+
 -------------------------------------------------------------------
 Wed Oct  2 10:28:33 UTC 2019 - Martin Wilck <mwilck@suse.com>
 

lvm2.spec

@@ -60,6 +60,7 @@ Patch0002:      bug-1149408_Fix-rounding-writes-up-to-sector-size.patch
 Patch0003:      bug-1149408_vgcreate-vgextend-restrict-PVs-with-mixed-block-size.patch
 Patch0004:      bug-1152378-md-component-detection-for-differing-PV-and-device-s.patch
 Patch0005:      bug-1152378-pvscan-fix-PV-online-when-device-has-a-different-siz.patch
+Patch0006:      jcs-SLE5498_pvscan-allow-use-of-noudevsync-option.patch
 # SUSE patches: 1000+ for LVM
 # Never upstream
 Patch1001:      cmirrord_remove_date_time_from_compilation.patch
@@ -119,6 +120,7 @@ Volume Manager.
 %patch0003 -p1
 %patch0004 -p1
 %patch0005 -p1
+%patch0006 -p1
 %patch1001 -p1
 %patch1002 -p1
 %patch1003 -p1