On Tue, Jul 06, 2021 at 05:47:26AM +0800, brookxu wrote: > From: Chunguang Xu <brookxu@xxxxxxxxxxx> > > On the IO submission path, blk_account_io_start() may interrupt > the system interruption. When the interruption returns, the value > of part->stamp may have been updated by other cores, so the time > value collected before the interruption may be less than part-> > stamp. So when this happens, we should do nothing to make io_ticks > more accurate? For kernels less than 5.0, this may cause io_ticks > to become smaller, which in turn may cause abnormal ioutil values. > > v3: update the commit log > v2: sorry, fix compile error due to the missed ')' > > Signed-off-by: Chunguang Xu <brookxu@xxxxxxxxxxx> The change looks good: Reviewed-by: Christoph Hellwig <hch@xxxxxx> Although I still have trouble understanding the commit log, especially the last sentence.
