Hi Shawn, Christoph, On Monday 28 May 2018 01:19 PM, Shawn Lin wrote: > card->erased_byte read from SCR(for SD cards) or EXT_CSD[181](for eMMC) > indicates whether the TRIM or ERASE make the erased data content zeros, > but DISCARD doesn't. Use the fact to implement REQ_OP_WRITE_ZEROES. > > Cc: Faiz Abbas <faiz_abbas@xxxxxx> > Cc: Christoph Hellwig <hch@xxxxxx> > Signed-off-by: Shawn Lin <shawn.lin@xxxxxxxxxxxxxx> > --- > Hi Faiz, > Would you like to test this patch to see if it could > solve your performance drop on the first write after > filesystem creation? > This patch doesn't fix the issue for me. I tested it on the latest master. I should get to further analyzing this by early next week. Log (notice first throughput lower than others): https://pastebin.ubuntu.com/p/NmZqzwfNjz/ Thanks, Faiz -- To unsubscribe from this list: send the line "unsubscribe linux-mmc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
