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Macro HISI_SAS_SGE_PAGE_CNT is defined to SG_CHUNK_SIZE, which is 128. This means that sizeof(struct hisi_sas_slot_buf_table) is 4192. This is just over a 4K, which can mean inefficient DMA memory usage (for no PI). Reduce the size of HISI_SAS_SGE_PAGE_CNT to 124 to fit in a 4K page. With this change, we experience no performance hit. Cc: dann frazier <dann.frazier@canonical.com> Signed-off-by: John Garry <john.garry@huawei.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com> |
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.. | ||
hisi_sas_main.c | ||
hisi_sas_v1_hw.c | ||
hisi_sas_v2_hw.c | ||
hisi_sas_v3_hw.c | ||
hisi_sas.h | ||
Kconfig | ||
Makefile |