From c2b40b6bf54768f1a23e4a881287608f7c3a1724 Mon Sep 17 00:00:00 2001
From: alex <alex>
Date: Mon, 5 Sep 2005 14:47:38 +0000
Subject: [PATCH] - complain if kernel doesn't support 1MB request
---
lustre/lvfs/fsfilt_ext3.c | 11 +++++++++++
1 file changed, 11 insertions(+)
diff --git a/lustre/lvfs/fsfilt_ext3.c b/lustre/lvfs/fsfilt_ext3.c
index 7e88750b09..f50b9f68f2 100644
--- a/lustre/lvfs/fsfilt_ext3.c
+++ b/lustre/lvfs/fsfilt_ext3.c
@@ -1247,6 +1247,17 @@ static int fsfilt_ext3_setup(struct obd_device *obd, struct super_block *sb)
sbi->s_mdsnum = es->s_mdsnum;
}
#endif
+ if (!strncmp(obd->obd_type->typ_name, "obdfilter", 9)) {
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
+ request_queue_t *q = bdev_get_queue(sb->s_bdev);
+ if (q->max_phys_segments * PAGE_SIZE < (1 << 20))
+#else
+ if (MAX_SEGMENTS * PAGE_SIZE < (1 << 20))
+#endif
+ CDEBUG(D_WARNING, "Lustre loves 1MB requests, "
+ "but current max_phys_segments=%d\n",
+ q->max_phys_segments);
+ }
return 0;
}
--
GitLab