Re: [PATCH V4 00/16] use sg helper to operate scatterlist

2019-06-17 Thread Bart Van Assche
On 6/16/19 8:03 PM, Ming Lei wrote: Scsi MQ makes a large static allocation for the first scatter gather list chunk for the driver to use. This is a performance headache we'd like to fix by reducing the size of the allocation to a 2 element array. Doing this will break the current guarantee tha

[PATCH V4 00/16] use sg helper to operate scatterlist

2019-06-16 Thread Ming Lei
Hi, Scsi MQ makes a large static allocation for the first scatter gather list chunk for the driver to use. This is a performance headache we'd like to fix by reducing the size of the allocation to a 2 element array. Doing this will break the current guarantee that any driver using SG_ALL doesn't