On Mon, Oct 23, 2017 at 11:31 AM, Pavel Machek <pavel@xxxxxx> wrote: >> > Thinkpad X220... how do I tell if I was using them? I believe so, >> > because I uncovered bug in them before. >> >> You are certainly using bounce buffers. What does lspci -knn show? > > Here is the output: > 0d:00.0 System peripheral [0880]: Ricoh Co Ltd PCIe SDXC/MMC Host Controller [1180:e823] (rev 07) > Subsystem: Lenovo Device [17aa:21da] > Kernel driver in use: sdhci-pci So that is a Ricoh driver, one of the few that was supposed to benefit from bounce buffers. Except that if you actually turned it on: > [10994.302196] kworker/2:1: page allocation failure: order:4, so it doesn't have enough memory to use these bounce buffers anyway. I'm now feel it was the right thing to delete them. I assume the problem doesn't appear in later -rc:s am I right? Yours, Linus Walleij -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>
