From: Patrick Farrell <pfarrell@whamcloud.com>
Date: Thu, 2 May 2019 13:06:58 +0000 (-0400)
Subject: LU-11690 lod: fix LBUG with wide striping
X-Git-Tag: 2.12.54~93
X-Git-Url: https://git.whamcloud.com/?p=fs%2Flustre-release.git;a=commitdiff_plain;h=f1ca2c0bd059e3606225127e5ff72b4db9a1ed6e

LU-11690 lod: fix LBUG with wide striping

When striping extremely widely (~1600+ stripes), we reach
more than half of the theoretical limit of layout size,
and LBUG.

It is also possible to trigger this assert with
multi-component PFL files, where all the components are
below the stripe count limit, but together they exceed it.

PFL makes asserting based on LOV_MAX_STRIPE_COUNT
unworkable, so just remove the assert.  Further work is
planned to match up maximum allowed layout size with
the real maximum EA size.

Signed-off-by: Patrick Farrell <pfarrell@whamcloud.com>
Change-Id: Id0240785792e7d4084ea6e53b44469a40e59043d
Reviewed-on: https://review.whamcloud.com/33708
Reviewed-by: Andreas Dilger <adilger@whamcloud.com>
Reviewed-by: Alex Zhuravlev <bzzz@whamcloud.com>
Reviewed-by: James Simmons <uja.ornl@yahoo.com>
Tested-by: Jenkins
Tested-by: Maloo <maloo@whamcloud.com>
---

diff --git a/lustre/lod/lod_lov.c b/lustre/lod/lod_lov.c
index 3223e98..673ca5b 100644
--- a/lustre/lod/lod_lov.c
+++ b/lustre/lod/lod_lov.c
@@ -600,8 +600,6 @@ int lod_ea_store_resize(struct lod_thread_info *info, size_t size)
 {
 	__u32 round = size_roundup_power2(size);
 
-	LASSERT(round <=
-		lov_mds_md_size(LOV_MAX_STRIPE_COUNT, LOV_MAGIC_V3));
 	if (info->lti_ea_store) {
 		LASSERT(info->lti_ea_store_size);
 		LASSERT(info->lti_ea_store_size < round);