>I'm working on a block device driver for linux.
>
>Linux caches the blocks read from my block device, which is fine. I've
>mounted a read-only filesystem on the block device. But sometimes on
>the back end the file system will change. Is there a way I can cause the
>kernel to just flush all its cached blocks? Or even better invalidate
>just the few blocks that have changed?
>
>Thanks--
>Dave
After some hunting (kernel hackers guide proved fruitless, web searches
were the same, looked in fs/buffer.c and found
void invalidate_bdev(struct block_device *bdev, int destroy_dirty_buffers);
Found use of it in block_dev.c:
/* Kill _all_ buffers, dirty or not.. */
static void kill_bdev(struct block_device *bdev)
{
invalidate_bdev(bdev, 1);
truncate_inode_pages(bdev->bd_inode->i_mapping, 0);
}
So hopefully I can just invalidate the block device when I need to.
-Dave
-
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/
This archive was generated by hypermail 2b29 : Fri Feb 07 2003 - 22:00:19 EST