* [linux-lvm] [PATCH] align lv_on_disk.base to 512K blocks
@ 2000-09-18 18:18 Michael Marxmeier
0 siblings, 0 replies; only message in thread
From: Michael Marxmeier @ 2000-09-18 18:18 UTC (permalink / raw)
To: linux-lvm
Forwarded message from Christoph Hellwig (hch@ns.lst.de) ...
-------- Original Message --------
Date: Thu, 14 Sep 2000 20:48:33 +0200
From: Christoph Hellwig <hch@ns.lst.de>
To: "Heinz J. Mauelshagen" <Heinz.Mauelshagen@t-online.de>
Cc: Linux LVM mailing list <linux-lvm@msede.com>
Subject: [PATCH] align lv_on_disk.base to 512K blocks
Message-ID: <20000914204833.A25390@ns.lst.de>
Hi Heinz,
this patch makes vgcreate align the lv structures to 512K on disk,
this makes reading them from kernel using bread much easier.
Could you aplly it to 0.9?
Christoph
--
Always remember that you are unique. Just like everyone else.
--- vg_setup_for_create.c~ Thu Sep 14 19:30:11 2000
+++ vg_setup_for_create.c Thu Sep 14 19:30:22 2000
@@ -43,6 +43,7 @@
int ret = 0;
uint pe_total = 0;
ulong rest = 0;
+ ulong size = 0;
#ifdef DEBUG
debug_enter ( "vg_setup_for_create -- CALLED\n");
@@ -89,8 +90,11 @@
vg->pv[p]->vg_on_disk.size = LVM_VG_DISK_SIZE;
vg->pv[p]->pv_namelist_on_disk.base =
LVM_PV_NAMELIST_DISK_BASE;
vg->pv[p]->pv_namelist_on_disk.size = ( max_pv + 1) * NAME_LEN;
- vg->pv[p]->lv_on_disk.base =
vg->pv[p]->pv_namelist_on_disk.base +
-
vg->pv[p]->pv_namelist_on_disk.size;
+
+ size = vg->pv[p]->pv_namelist_on_disk.base +
vg->pv[p]->pv_namelist_on_disk.size;
+ vg->pv[p]->lv_on_disk.base = (size / SECTOR_SIZE) *
SECTOR_SIZE;
+ if (size % SECTOR_SIZE)
+ vg->pv[p]->lv_on_disk.base += SECTOR_SIZE;
vg->pv[p]->lv_on_disk.size = ( max_lv + 1) * sizeof ( lv_t);
LVM_PE_ON_DISK_BASE ( vg->pv[p]);
strcpy ( vg->pv[p]->vg_name, vg->vg_name);
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2000-09-18 18:18 [linux-lvm] [PATCH] align lv_on_disk.base to 512K blocks Michael Marxmeier
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