From: Jinshan Xiong <jinshan.xiong@xxxxxxxxx> If there exists MGS conf_param to reduce the memory cache max_cached_mb it will fail because dt_exp is not initialized yet. It should just go ahead and configure it because certainly it have enough free LRU slot to deduct ccc_lru_left. Signed-off-by: Jinshan Xiong <jinshan.xiong@xxxxxxxxx> Reviewed-on: http://review.whamcloud.com/11783 Intel-bug-id: https://jira.hpdd.intel.com/browse/LU-3676 Reviewed-by: Bobi Jam <bobijam@xxxxxxxxx> Reviewed-by: Andreas Dilger <andreas.dilger@xxxxxxxxx> Signed-off-by: Oleg Drokin <oleg.drokin@xxxxxxxxx> --- drivers/staging/lustre/lustre/llite/lproc_llite.c | 8 +++++--- 1 file changed, 5 insertions(+), 3 deletions(-) diff --git a/drivers/staging/lustre/lustre/llite/lproc_llite.c b/drivers/staging/lustre/lustre/llite/lproc_llite.c index e6a909e..aaa13bd 100644 --- a/drivers/staging/lustre/lustre/llite/lproc_llite.c +++ b/drivers/staging/lustre/lustre/llite/lproc_llite.c @@ -399,9 +399,6 @@ static ssize_t ll_max_cached_mb_seq_write(struct file *file, return -ERANGE; } - if (sbi->ll_dt_exp == NULL) - return -ENODEV; - spin_lock(&sbi->ll_lock); diff = pages_number - cache->ccc_lru_max; spin_unlock(&sbi->ll_lock); @@ -437,6 +434,11 @@ static ssize_t ll_max_cached_mb_seq_write(struct file *file, if (diff <= 0) break; + if (sbi->ll_dt_exp == NULL) { /* being initialized */ + rc = -ENODEV; + break; + } + /* difficult - have to ask OSCs to drop LRU slots. */ tmp = diff << 1; rc = obd_set_info_async(NULL, sbi->ll_dt_exp, -- 2.1.0 _______________________________________________ devel mailing list devel@xxxxxxxxxxxxxxxxxxxxxx http://driverdev.linuxdriverproject.org/mailman/listinfo/driverdev-devel
