linux-kernel - [PATCH 18/35] staging: lustre: osc: fix max_dirty

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Message-Id: <1478799065-24841-19-git-send-email-jsimmons@infradead.org>
Date:   Thu, 10 Nov 2016 12:30:48 -0500
From:   James Simmons <jsimmons@...radead.org>
To:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        devel@...verdev.osuosl.org,
        Andreas Dilger <andreas.dilger@...el.com>,
        Oleg Drokin <oleg.drokin@...el.com>
Cc:     Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Lustre Development List <lustre-devel@...ts.lustre.org>,
        Gregoire Pichon <gregoire.pichon@...l.net>,
        James Simmons <jsimmons@...radead.org>
Subject: [PATCH 18/35] staging: lustre: osc: fix max_dirty_mb tunable setting limit

From: Gregoire Pichon <gregoire.pichon@...l.net>

The OSC tunable max_dirty_mb must be set to a value strictly lower
than 2048, as it is assumed by OSS in ofd_grant_alloc() routine.

Signed-off-by: Gregoire Pichon <gregoire.pichon@...l.net>
Intel-bug-id: https://jira.hpdd.intel.com/browse/LU-7218
Reviewed-on: http://review.whamcloud.com/16652
Reviewed-by: Andreas Dilger <andreas.dilger@...el.com>
Reviewed-by: Bobi Jam <bobijam@...mail.com>
Signed-off-by: James Simmons <jsimmons@...radead.org>
---
 drivers/staging/lustre/lustre/osc/lproc_osc.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/drivers/staging/lustre/lustre/osc/lproc_osc.c b/drivers/staging/lustre/lustre/osc/lproc_osc.c
index 4421cfe..575b296 100644
--- a/drivers/staging/lustre/lustre/osc/lproc_osc.c
+++ b/drivers/staging/lustre/lustre/osc/lproc_osc.c
@@ -162,7 +162,7 @@ static ssize_t max_dirty_mb_store(struct kobject *kobj,
 	pages_number *= 1 << (20 - PAGE_SHIFT); /* MB -> pages */
 
 	if (pages_number <= 0 ||
-	    pages_number > OSC_MAX_DIRTY_MB_MAX << (20 - PAGE_SHIFT) ||
+	    pages_number >= OSC_MAX_DIRTY_MB_MAX << (20 - PAGE_SHIFT) ||
 	    pages_number > totalram_pages / 4) /* 1/4 of RAM */
 		return -ERANGE;
 
-- 
1.7.1