Hi David, Thanks for your comments.
> -----Original Message----- > From: David Laight [mailto:[email protected]] > Sent: 2016年4月9日 0:01 > To: Zhiqiang Hou <[email protected]>; Scott Wood <[email protected]>; > [email protected]; [email protected]; [email protected]; > [email protected] > Cc: Mingkai Hu <[email protected]> > Subject: RE: [PATCH] powerpc/config: Disable the 4KiB erase granularity of SPI > flash > > From: Zhiqiang Hou > > Sent: 07 April 2016 04:17 > ... > > > Is there a reason specific to 85xx to have a different default than > > > every other platform except lpc18xx? The description of > > > MTD_SPI_NOR_USE_4K_SECTORS acknowledges that erase speed is a > > > tradeoff. Why is that concern more compelling on 85xx than elsewhere? > > > > > > > I don't want to specify 85xx, but configs of fsl. I'm still confusing > > about so many configs. Will add other platforms if necessary. > > > > For this patch, it takes about 13 mins to erase 64MiB by subsector > > erase command (4KiB per time), but takes 2 mins by sector erase > > command(64KiB per time). It is conspicuous decrease. Why it uses the > > 4KiB granularity by default, what's the benefit? > > Should it be doing 64K erases followed by 0 to 15 4K erases for any final > fragment? When will this situation come up? Thanks, Zhiqiang _______________________________________________ Linuxppc-dev mailing list [email protected] https://lists.ozlabs.org/listinfo/linuxppc-dev
