![]() | |||||||||||||
Messages in this thread |
Nick Piggin wrote: > Eric W. Biederman wrote: >> When we initialize the ramdisk by writing to /dev/ram0 usually in >> init/do_mounts_rd.c we don't allocate buffer heads but we do set >> the dirty bit, and the page is in the page cache. So when we >> later call getblk it reuses the same page and then calls >> init_page_buffers. > > > Hmm, so this would be a problem for block_dev.c as well, then? > Because it would be possible to have a dirty block dev page > have its buffers reclaimed and then reinitialised via > init_page_buffers, AFAIKS. Oh, no, try_to_free_buffers won't drop dirty buffers. However we could still set_page_dirty of a block device page without buffers via an mmap. -- SUSE Labs, Novell Inc. - 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/ | ||||||||||||
| Last update: 2007-05-28 07:01 [from the cache] ©2003-2008 | |||||||||||||