On 4/10/16 10:04 AM, James Simmons wrote: > >> This patch was shown not to work. I just haven't removed it from opensuse yet. > > Its been running in our production tree as well for some time. Guess that > change is a noop. In any case we have been discussing redoing the lloop > driver anyways. Just need to find the cycles. I guess my memory was flakey and I was recalling the first comments in LU-4000. The updated version should be ok. -Jeff >> -- >> Jeff Mahoney >> (apologies for the top post -- from my mobile) >> >>> On Apr 10, 2016, at 9:13 AM, James Simmons <jsimmons@xxxxxxxxxxxxx> wrote: >>> >>> From: Jeff Mahoney <jeffm@xxxxxxxx> >>> >>> On ppc64 with 64k pages, we get a build failure in lloop: >>> >>> drivers/staging/lustre/lustre/llite/lloop.c:527:2: >>> note: in expansion of macro 'CLASSERT' >>> CLASSERT(PAGE_CACHE_SIZE < (1 << (sizeof(unsigned short) * 8))); >>> >>> There's no need to change the queue's logical block size. Even if it could >>> accept a 64k value, that would result in any file system on top of it >>> needing to also use 64k blocks. It'd be safe to set it to 4k, but there's >>> no actual need for it. It's not used to split requests except for WRITE_SAME, >>> which lloop doesn't implement anyway. >>> >>> Signed-off-by: Jeff Mahoney <jeffm@xxxxxxxx> >>> Intel-bug-id: https://jira.hpdd.intel.com/browse/LU-4000 >>> Reviewed-on: http://review.whamcloud.com/7745 >>> Reviewed-by: Jinshan Xiong <jinshan.xiong@xxxxxxxxx> >>> Reviewed-by: Minh Diep <minh.diep@xxxxxxxxx> >>> Reviewed-by: Oleg Drokin <oleg.drokin@xxxxxxxxx> >>> Signed-off-by: James Simmons <jsimmons@xxxxxxxxxxxxx> >>> --- >>> drivers/staging/lustre/lustre/llite/lloop.c | 3 --- >>> 1 files changed, 0 insertions(+), 3 deletions(-) >>> >>> diff --git a/drivers/staging/lustre/lustre/llite/lloop.c b/drivers/staging/lustre/lustre/llite/lloop.c >>> index b725fc1..f396753 100644 >>> --- a/drivers/staging/lustre/lustre/llite/lloop.c >>> +++ b/drivers/staging/lustre/lustre/llite/lloop.c >>> @@ -525,9 +525,6 @@ static int loop_set_fd(struct lloop_device *lo, struct file *unused, >>> lo->lo_queue->queuedata = lo; >>> >>> /* queue parameters */ >>> - CLASSERT(PAGE_CACHE_SIZE < (1 << (sizeof(unsigned short) * 8))); >>> - blk_queue_logical_block_size(lo->lo_queue, >>> - (unsigned short)PAGE_CACHE_SIZE); >>> blk_queue_max_hw_sectors(lo->lo_queue, >>> LLOOP_MAX_SEGMENTS << (PAGE_CACHE_SHIFT - 9)); >>> blk_queue_max_segments(lo->lo_queue, LLOOP_MAX_SEGMENTS); >>> -- >>> 1.7.1 >>> >>> >> >> > -- Jeff Mahoney SUSE Labs
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