File 0003-Super-intel-Fix-first-checkpoint-restart.p... of Package mdadm

Overview Repositories Revisions Requests Users Attributes Meta

File 0003-Super-intel-Fix-first-checkpoint-restart.patch of Package mdadm (Revision 41053b233db3edd15f0c6cb2e16966d9)

Currently displaying revision 41053b233db3edd15f0c6cb2e16966d9 , Show latest

From fdb7e802f4cf64d067c3abaafa35056e2bc1ed43 Mon Sep 17 00:00:00 2001
From: Mateusz Kusiak <mateusz.kusiak@intel.com>
Date: Thu, 18 Jan 2024 11:30:17 +0100
Subject: [PATCH 3/5] Super-intel: Fix first checkpoint restart
Git-commit: fdb7e802f4cf64d067c3abaafa35056e2bc1ed43
Patch-mainline: mdadm-4.3+
References: jsc#PED-7542

When imsm based array is stopped after reaching first checkpoint and
then assembled, first checkpoint is reported as 0.

This behaviour is valid only for initial checkpoint, if the array was
stopped while performing some action.

Last checkpoint value is not taken from metadata but always starts
with 0 and it's incremented when sync_completed in sysfs changes.

In simplification, read_and_act() is responsible for checkpoint updates
and is executed each time sysfs checkpoint update happens. For first
checkpoint it is executed twice and due to marking checkpoint before
triggering any action on the array, it is impossible to read
sync_completed from sysfs in just two iterations.

The workaround to this is not marking any checkpoint for first
sysfs checkpoint after RAID assembly, to preserve checkpoint value
stored in metadata.

Signed-off-by: Mateusz Kusiak <mateusz.kusiak@intel.com>
Signed-off-by: Mariusz Tkaczyk <mariusz.tkaczyk@linux.intel.com>
Signed-off-by: Coly Li <colyli@suse.de>
---
 super-intel.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/super-intel.c b/super-intel.c
index dbea235..e61f3f6 100644
--- a/super-intel.c
+++ b/super-intel.c
@@ -8771,6 +8771,9 @@ static int imsm_set_array_state(struct active_array *a, int consistent)
 		super->updates_pending++;
 	}
 
+	if (a->prev_action == idle)
+		goto skip_mark_checkpoint;
+
 mark_checkpoint:
 	/* skip checkpointing for general migration,
 	 * it is controlled in mdadm
-- 
2.35.3

Places

File 0003-Super-intel-Fix-first-checkpoint-restart.patch of Package mdadm (Revision 41053b233db3edd15f0c6cb2e16966d9)

Places