On 9/21/18 7:05 AM, Christoph Hellwig wrote: > On Fri, Sep 21, 2018 at 03:04:18PM +0200, Vitaly Kuznetsov wrote: >> Christoph Hellwig <hch@xxxxxx> writes: >> >>> On Wed, Sep 19, 2018 at 05:15:43PM +0800, Ming Lei wrote: >>>> 1) does kmalloc-N slab guarantee to return N-byte aligned buffer? If >>>> yes, is it a stable rule? >>> >>> This is the assumption in a lot of the kernel, so I think if somethings >>> breaks this we are in a lot of pain. >> >> It seems that SLUB debug breaks this assumption. Kernel built with >> >> CONFIG_SLUB_DEBUG=y >> CONFIG_SLUB=y >> CONFIG_SLUB_DEBUG_ON=y > > Looks like we should fix SLUB debug then.. Fully agree, it's such a fundamental property. -- Jens Axboe
