Bodo Stroesser 5153710a5e scsi: target: tcmu: Optimize use of flush_dcache_page ... commit 3c58f73723 upstream. (scatter|gather)_data_area() need to flush dcache after writing data to or before reading data from a page in uio data area. The two routines are able to handle data transfer to/from such a page in fragments and flush the cache after each fragment was copied by calling the wrapper tcmu_flush_dcache_range(). That means: 1) flush_dcache_page() can be called multiple times for the same page. 2) Calling flush_dcache_page() indirectly using the wrapper does not make sense, because each call of the wrapper is for one single page only and the calling routine already has the correct page pointer. Change (scatter|gather)_data_area() such that, instead of calling tcmu_flush_dcache_range() before/after each memcpy, it now calls flush_dcache_page() before unmapping a page (when writing is complete for that page) or after mapping a page (when starting to read the page). After this change only calls to tcmu_flush_dcache_range() for addresses in vmalloc'ed command ring are left over. The patch was tested on ARM with kernel 4.19.118 and 5.7.2 Link: https://lore.kernel.org/r/20200618131632.32748-2-bstroesser@ts.fujitsu.com Tested-by: JiangYu <lnsyyj@hotmail.com> Tested-by: Daniel Meyerholt <dxm523@gmail.com> Acked-by: Mike Christie <michael.christie@oracle.com> Signed-off-by: Bodo Stroesser <bstroesser@ts.fujitsu.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2020-09-05 11:22:51 +02:00
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iscsi	scsi: target: fix hang when multiple threads try to destroy the same iscsi session	2020-04-21 09:05:04 +02:00
loopback	scsi: target: loopback: Fix READ with data and sensebytes	2020-06-24 17:50:25 +02:00
sbp	…
tcm_fc	…
Kconfig	…
Makefile	…
target_core_alua.c	…
target_core_alua.h	…
target_core_configfs.c	…
target_core_device.c	…
target_core_fabric_configfs.c	…
target_core_fabric_lib.c	scsi: target: fix PR IN / READ FULL STATUS for FC	2020-05-02 08:48:56 +02:00
target_core_file.c	…
target_core_file.h	…
target_core_hba.c	…
target_core_iblock.c	scsi: target/iblock: fix WRITE SAME zeroing	2020-05-06 08:15:14 +02:00
target_core_iblock.h	…
target_core_internal.h	scsi: target: Fix xcopy sess release leak	2020-09-03 11:26:44 +02:00
target_core_pr.c	…
target_core_pr.h	…
target_core_pscsi.c	…
target_core_pscsi.h	…
target_core_rd.c	…
target_core_rd.h	…
target_core_sbc.c	…
target_core_spc.c	…
target_core_stat.c	…
target_core_tmr.c	…
target_core_tpg.c	…
target_core_transport.c	scsi: target: Fix xcopy sess release leak	2020-09-03 11:26:44 +02:00
target_core_ua.c	…
target_core_ua.h	…
target_core_user.c	scsi: target: tcmu: Optimize use of flush_dcache_page	2020-09-05 11:22:51 +02:00
target_core_xcopy.c	scsi: target: Fix xcopy sess release leak	2020-09-03 11:26:44 +02:00
target_core_xcopy.h	…