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Date: Thu, 16 Oct 2008 14:28:50 +0800 From: gshan <gshan@...atel-lucent.com> To: Jens Axboe <jens.axboe@...cle.com> CC: linux-kernel@...r.kernel.org, bzolnier@...il.com Subject: Re: how to limit number of sectors each time >> I'm using IDE driver instead of HD driver. >> I dumped out IO registers and PRD table. Note that maxinum allowed sector number has been decreased from 256 to 32. hdc: dma_timer_expiry: dma status == 0x21 ========IDE Register DUmp======== DMA start sector: 0x007d5fb5 DMA sectors : 0x0020 Data Reg : 0x00 Error Reg : 0x00 Nsector Reg : 0x19 Sector Reg : 0xbc LCYL Reg : 0x5f HCYL Reg : 0x7d Select Reg : 0xe0 Status Reg : 0x58 Control Reg : 0x58 IRQ Reg : 0x58 ======Physical Region Descriptor======= Base_PRD: 0x0189f000 Current_PRD: 0x0189f008 Entries:3 index=0 base=0x00204d1c lengh=0x00100000 index=1 base=0x00604c1c lengh=0x00200000 index=2 base=0x00304d1c lengh=0x00100080 -- 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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