Date: Wed, 13 Oct 2021 07:35:51 +0000 From: bugzilla-noreply@freebsd.org To: bugs@FreeBSD.org Subject: [Bug 259129] FreeBSD 13.0: Corruption in SGL observed while running IO with smartqpi driver Message-ID: <bug-259129-227@https.bugs.freebsd.org/bugzilla/>
next in thread | raw e-mail | index | archive | help
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D259129 Bug ID: 259129 Summary: FreeBSD 13.0: Corruption in SGL observed while running IO with smartqpi driver Product: Base System Version: 13.0-RELEASE Hardware: amd64 OS: Any Status: New Severity: Affects Only Me Priority: --- Component: kern Assignee: bugs@FreeBSD.org Reporter: Hermes.TK@microchip.com Created attachment 228651 --> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=3D228651&action= =3Dedit Attaching kernel logs for reference In FreeBSD 13.0, while running IO with blocksize 1MB, observed corruption in SGL. We were running IO with FIO (version 3.28)IO tool. Command used : fio --filename=3D/dev/da0: -direct=3D1 -iodepth=3D32 -ioengine=3Dposixaio -= rw=3Drandrw -bs=3D1024k -numjobs=3D8 -runtime=3D30 -group_reporting -name=3Dstress Transfer size used in smartpqi driver: In update_sim_properties FUNCTION cpi->maxio =3D (softs->pqi_cap.max_sg_elem - 1) * PAGE_SIZE; ie: Max transfer size: 0x21f000 (2.24 MB) While running IO with 1mb block size , getting EINPROGRESS status for bus_dmamap_load_ccb in pqi_map_request function. function stack =3D> smartpqi_cam_action() -> pqisrc_io_start() -> pqi_map_request() -> bus_dmamap_load_ccb() -> pqi_request_map_helper After receiving the EINPROGRESS status for bus_dmamap_load_ccb(),=20 pqi_request_map_helper callback function is called . Then observed corruption in the SGL received. Eg: While running FIO with 1 MB block size, the total mapped SGL length received is 0x3002c0 (3.14MB), where the total transfer size for the IO was= =20 0x100000 (1.04MB).=20=20 SGL dump(Added debug prints to dump sgl): 05:30:29 freebsd13 kernel: [NOTE]:[ pqi_map_request ] [ 615 ]Total transfer size : 100000 for tag value 37, Max transfer size: 21f000 Oct 6 05:30:29 freebsd13 kernel: [NOTE]:[ pqi_request_map_helper ] [ 577 ]Submitting IO With tag 30 after EINPROGRESS status[NOTE]:[ pqisrc_build_sg= l ] [ 108 ]SGL_Count :256 for tag 30 Oct 6 05:30:29 freebsd13 kernel: [NOTE]:[ pqisrc_build_sgl ] [ 131 ]SGL Chaining Oct 6 05:30:29 freebsd13 kernel: [NOTE]:[ pqisrc_build_sgl ] [ 140 ]TAG: 30 sgt->addr[0]: 5930000 Oct 6 05:30:29 freebsd13 kernel: [NOTE]:[ pqisrc_build_sgl ] [ 142 ]TAG: 30 sgt->len[0]: 1000 Oct 6 05:30:29 freebsd13 kernel: [NOTE]:[ pqisrc_build_sgl ] [ 140 ]TAG: 30 sgt->addr[1]: 592f000 Oct 6 05:30:29 freebsd13 kernel: [NOTE]:[ pqisrc_build_sgl ] [ 142 ]TAG: 30 sgt->len[1]: 1000 Oct 6 05:30:29 freebsd13 kernel: [NOTE]:[ pqisrc_build_sgl ] [ 140 ]TAG: 30 sgt->addr[255]: 5831000 Oct 6 05:30:29 freebsd13 kernel: [NOTE]:[ pqisrc_build_sgl ] [ 142 ]TAG: 30 sgt->len[255]: 1000 Oct 6 05:30:29 freebsd13 kernel: [NOTE]:[ pqisrc_build_sgl ] [ 147 ]Total = sg length =3D 3002c0 for tag value 30 Oct 6 05:30:29 freebsd13 kernel: [NOTE]:[ pqisrc_show_cdb ] [ 1615 ]TAG: 30 When we tried in FreeBSD 12.2, the maximum block size allowed to run in fio= is 128k. We are suspecting some issue in SGL handling with FreeBSD 13.0. --=20 You are receiving this mail because: You are the assignee for the bug.=
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?bug-259129-227>