<div> When I used a VG of 1.82TB to create a 100GB pool, it faild. The err mesg "cannot allocte memory",however, my host's meminfo: [root@host2 persistent-data]# cat /proc/meminfo MemTotal: 10234416 kB MemFree: 9685956 kB whether I should configure somewhere to make it work well(create bigger pool)? This is the mesgs: --------------------- <div> [root@host2 ~]# pvs Ignoring too small pv_min_size 512KB, using default 2048KB. PV VG Fmt Attr PSize PFree /dev/sda2 VolGroup00 lvm2 a-- 931.41G 0 /dev/sdb vg01 lvm2 a-- 931.51G 193.51G /dev/sdc vg01 lvm2 a-- 931.51G 931.51G /dev/sdd vg02 lvm2 a-- 931.51G 927.51G /dev/sdg vg_pool lvm2 a-- 931.51G 931.51G /dev/sdl vg_pool lvm2 a-- 931.51G 931.51G [root@host2 ~]# vgs Ignoring too small pv_min_size 512KB, using default 2048KB. VG #PV #LV #SN Attr VSize VFree VolGroup00 1 2 0 wz--n- 931.41G 0 vg01 2 7 0 wz--n- 1.82T 1.10T vg02 1 1 0 wz--n- 931.51G 927.51G vg_pool 2 0 0 wz--n- 1.82T 1.82T [root@host2 ~]# lvcreate -L 100G -T vg_pool/thin_lv Ignoring too small pv_min_size 512KB, using default 2048KB. Rounding up size to full physical extent 4.00 MB device-mapper: resume ioctl on failed: Cannot allocate memory Unable to resume vg_pool-thin_lv-tpool (253:15) Aborting. Failed to activate thin thin_lv. </div></div><div> Busby </div><pre> > -----原始邮件----- > 发件人: "Alasdair G Kergon" <agk@redhat.com> > 发送时间: 2012年1月31日星期二 > 收件人: "LVM general discussion and development" <linux-lvm@redhat.com> > 抄送: dm-devel@redhat.com, lvm-devel@redhat.com > 主题: Re: [linux-lvm] New LVM2 release 2.02.89: Thinly-provisioned logical volumes > > On Tue, Jan 31, 2012 at 05:52:21PM +0800, Busby.Cheung wrote: > > I tryed to use this LVM2 to create thin pool and thin lv, but it said PE was required. The VG I used is free, can anyone help me? Should any more args be needed? Is there any more detailed HowTo file than man file? > > > For now, you need either 2 PVs in the VG, or use --alloc anywhere with 1 PV, or > split the allocation manually like: > > > [root@host2 ~]# lvcreate -L100M -T vg_pool/pool -V 1T --name thin_lv /dev/sdl:0 /dev/sdl:1- > > I have a patch that fixes this problem, but I'm still testing it. > > Alasdair > > > _______________________________________________ > linux-lvm mailing list > linux-lvm@redhat.com > https://www.redhat.com/mailman/listinfo/linux-lvm > read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/ </pre>