--- saeed bishara <[EMAIL PROTECTED]> wrote: > Hi, > I came across data corruption problem when using xfs, my system is > arm 926, the data cache is virtually tagged and virtually indexed and > with no hw cache coherency. my CPU features the data cache write > allocate-> when doing store, the cache line of the destination address > is loaded to data cache. > when enabling the write allocate, I got data corruption with the > xfs. the scenario is that the xfs allocates large buffer (for reading > the log records) using vmalloc, and the low level driver (raid) copies > the data to the bio vectors using the linear address, since the write > allocate is enabled, the correct data remains on the data cache with > the linear address tag, when the IO completes, the xfs access the data > with using the vmalloc virtual address, which is different than the > kernel linear address, thus it will get a stale data!. > > how should I fix this problem? I thought that only the > copy/clean_user_pages() functions should be aware to the write > allocate. I wonder if I'm seeing this with reiser4 on pxa27x as well???
Steve ___________________________________________________________ Now you can have your favourite RSS headlines come to you with the all new Yahoo! Mail. http://uk.docs.yahoo.com/nowyoucan.html - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/