Messages in this thread | | | Date | Thu, 1 Mar 2001 21:56:23 +0100 (MET) | From | Roman Zippel <> | Subject | Re: [CFT][PATCH] Re: fat problem in 2.4.2 |
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Hi,
On Thu, 1 Mar 2001, Alexander Viro wrote:
> +static int generic_vm_expand(struct address_space *mapping, loff_t size) > +{ > + struct page *page; > + unsigned long index, offset; > + int err; > + > + if (!mapping->a_ops->prepare_write || !mapping->a_ops->commit_write) > + return -ENOSYS; > + > + offset = (size & (PAGE_CACHE_SIZE-1)); /* Within page */ > + index = size >> PAGE_CACHE_SHIFT;
For affs I did basically the same with a small difference:
offset = ((size-1) & (PAGE_CACHE_SIZE-1)) + 1; index = (size-1) >> PAGE_CACHE_SHIFT;
That works fine here and allocates a page in the cache more likely to be used.
bye, Roman
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