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Message-Id: <11787925152319-git-send-email-jens.axboe@oracle.com> Date: Thu, 10 May 2007 12:21:42 +0200 From: Jens Axboe <jens.axboe@...cle.com> To: linux-kernel@...r.kernel.org Subject: [PATCH 0/13] Chaining sg lists for bio IO commands v3 Hi, Third version of the patchset. Changes since v2: - Get rid of ->next and use the ->page field as a next pointer. This saves some space in the scatterlist structure, at the cost of one extra sg segment per chained list. Should definitely be a space win. - Cleanup linux/scatterlist.h, most of the stuff is outside the ARCH_HAS_SG_CHAIN ifdef now. - Convert the x86-64 iommu code, enable it on x86-64. - Convert all (hopefully) SCSI drivers to use the sg helpers so chaining can be supported globally. I collated all the SCSI driver patches into the 13/13 patch, as not to post a huge patch series. I would much appreciate some eye balls on this part, catching any dumb mistakes I may have made. The changes are usually trivial, but some are not and I do clown around occasionally :-) Like v2, you still need to enable large commands manually for a device, ala: # cd /sys/block/sda/queue # echo 1024 > max_segments # cat max_hw_sectors_kb > max_sectors_kb which would limit you to 1024 segments (effectively 8 scatterlists chained), and should give you IO's of at least 4mb. You can go larger than 1024, there's no real limit. arch/ia64/hp/sim/simscsi.c | 23 +- arch/x86_64/kernel/pci-calgary.c | 25 +- arch/x86_64/kernel/pci-gart.c | 44 ++-- arch/x86_64/kernel/pci-nommu.c | 5 block/ll_rw_blk.c | 41 +++- crypto/digest.c | 2 crypto/scatterwalk.c | 2 crypto/scatterwalk.h | 2 drivers/ata/libata-core.c | 30 +-- drivers/infiniband/ulp/srp/ib_srp.c | 22 +- drivers/scsi/3w-9xxx.c | 8 drivers/scsi/3w-xxxx.c | 8 drivers/scsi/53c700.c | 16 - drivers/scsi/BusLogic.c | 7 drivers/scsi/NCR53c406a.c | 18 +- drivers/scsi/a100u2w.c | 9 - drivers/scsi/aacraid/aachba.c | 29 +-- drivers/scsi/advansys.c | 21 +- drivers/scsi/aha1542.c | 21 +- drivers/scsi/aha1740.c | 8 drivers/scsi/aic7xxx/aic79xx_osm.c | 3 drivers/scsi/aic7xxx/aic7xxx_osm.c | 12 - drivers/scsi/aic94xx/aic94xx_task.c | 6 drivers/scsi/arcmsr/arcmsr_hba.c | 11 - drivers/scsi/dc395x.c | 7 drivers/scsi/dpt_i2o.c | 13 - drivers/scsi/eata.c | 8 drivers/scsi/esp_scsi.c | 5 drivers/scsi/gdth.c | 45 ++--- drivers/scsi/hptiop.c | 8 drivers/scsi/ibmmca.c | 11 - drivers/scsi/ibmvscsi/ibmvscsi.c | 4 drivers/scsi/ide-scsi.c | 31 ++- drivers/scsi/initio.c | 12 - drivers/scsi/ipr.c | 9 - drivers/scsi/ips.c | 74 ++++---- drivers/scsi/iscsi_tcp.c | 43 ++-- drivers/scsi/jazz_esp.c | 27 +-- drivers/scsi/lpfc/lpfc_scsi.c | 9 - drivers/scsi/mac53c94.c | 9 - drivers/scsi/megaraid.c | 13 - drivers/scsi/megaraid/megaraid_mbox.c | 7 drivers/scsi/megaraid/megaraid_sas.c | 16 - drivers/scsi/mesh.c | 12 - drivers/scsi/ncr53c8xx.c | 7 drivers/scsi/nsp32.c | 9 - drivers/scsi/pcmcia/sym53c500_cs.c | 18 +- drivers/scsi/qla1280.c | 66 ++++--- drivers/scsi/qla2xxx/qla_iocb.c | 9 - drivers/scsi/qla4xxx/ql4_iocb.c | 8 drivers/scsi/qlogicfas408.c | 9 - drivers/scsi/qlogicpti.c | 15 - drivers/scsi/scsi_debug.c | 14 - drivers/scsi/scsi_lib.c | 230 +++++++++++++++++++------- drivers/scsi/scsi_tgt_lib.c | 4 drivers/scsi/sym53c416.c | 9 - drivers/scsi/sym53c8xx_2/sym_glue.c | 7 drivers/scsi/u14-34f.c | 10 - drivers/scsi/ultrastor.c | 10 - drivers/scsi/wd7000.c | 7 include/asm-i386/dma-mapping.h | 13 - include/asm-i386/scatterlist.h | 2 include/asm-x86_64/dma-mapping.h | 3 include/asm-x86_64/scatterlist.h | 2 include/linux/libata.h | 16 + include/linux/scatterlist.h | 55 ++++++ include/scsi/scsi.h | 7 include/scsi/scsi_cmnd.h | 3 68 files changed, 753 insertions(+), 516 deletions(-) - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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