On 2014/10/13 12:52, Lluís Batlle i Rossell wrote: > Hello, > > on the 7th of January 2014 ths patch was applied: > https://lkml.org/lkml/2014/1/7/307 > > [PATCH v2] net: Do not enable tx-nocache-copy by default > > In the Sheevaplug (ARM Feroceon 88FR131 from Marvell) this made packets to be > sent corrupted. I think this machine has something special about the cache. > > Enabling back this tx-nocache-copy (as it used to be before the patch) the > transfers work fine again. I think that most people, encountering this > problem, > completely disable the tx offload instead of enabling back this setting. > > Is this an ARM kernel problem regarding this platform?
This is odd, only x86 defines ARCH_HAS_NOCACHE_UACCESS. On arm, skb_do_copy_data_nocache() should end up using __copy_from_user() regardless of tx-nocache-copy. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
