On 2015/7/29 8:40, Andrew Morton wrote: > On Wed, 29 Jul 2015 08:30:59 +0800 Joseph Qi <joseph...@huawei.com> wrote: > >> On 2015/7/29 4:51, Andrew Morton wrote: >>> On Mon, 27 Jul 2015 11:39:16 +0800 Joseph Qi <joseph...@huawei.com> wrote: >>> >>>> cluster pos is defined as u32, when calculate corresponding sector it >>>> should be converted to u64 first, otherwise it may overflow. >>> >>> What are the runtime effects of this change? >>> >> The issue is when using large volume, for example, 9T volume with 2T already >> used, frequently create small files with O_DIRECT and the IO is not cluster >> aligned, it may clear sectors in the wrong place. > > You mean it corrupts the filesystem? > > So this wants to be merged asap and backported as far as possible? > Yes, it only affects kernel 4.0+.
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