Messages in this thread | | | Date | Fri, 06 Jul 2007 11:41:38 +0200 | From | Zoltan Menyhart <> | Subject | Re: [BUGFIX]{PATCH] flush icache on ia64 take2 |
| |
KAMEZAWA Hiroyuki wrote:
> Note1: icache flush is called only when VM_EXEC flag is on and > PG_arch_1 is not set.
If you have not got the page in the cache, then the new page will be allocated with PG_arch_1 bit off. You are going to flush pages which are read by HW DMA, i.e. the L2I of Montecito does not keep old lines for those pages anyway.
...->a_ops->readpage() of "L2I safe" file systems should set PG_arch_1 if the CPU is ia64 and it has got separate L2I.
On the other hand, arch. independent file systems should not play with PG_arch_1. The base kernel should export a macro for the file systems...
Thanks,
Zoltan Menyhart
- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
| |