Hi Jens, This series aimed to avoid effects of a weird queue depth, i.e when less than reserved_tags requested or insufficient number of requests were allocated.
In case number of normal (not reserved) tags is requested less than 4 (current minimal cache size limit) there are two options to resolve: adjust cache size to the depth or deny queue depths less than the minimal cache size. I favored the latter, but will repost if you prefer otherwise. Alexander Gordeev (3): blk-mq: Sanity check reserved tags blk-mq: Check queue depth is valid blk-mq: Do not allocate more cache entries than used block/blk-mq-tag.c | 31 ++++++++++++++++++------------- block/blk-mq-tag.h | 6 ++++++ block/blk-mq.c | 12 +++++++----- 3 files changed, 31 insertions(+), 18 deletions(-) -- 1.7.7.6 -- Regards, Alexander Gordeev [email protected] -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
