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staging: lustre: osc: fix max_dirty_mb tunable setting limit

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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@bull.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@intel.com>
Reviewed-by: Bobi Jam <bobijam@hotmail.com>
Signed-off-by: James Simmons <jsimmons@infradead.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Gregoire Pichon 2016-11-10 12:30:48 -05:00 committed by Greg Kroah-Hartman
parent b8cb86fd95
commit c7298013ce
1 changed files with 1 additions and 1 deletions
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drivers/staging/lustre/lustre/osc/lproc_osc.c
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@ -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;