svn commit: r201773 - head/sys/fs/tmpfs
Bruce Evans
brde at optusnet.com.au
Sun Jan 10 07:18:53 UTC 2010
On Fri, 8 Jan 2010, Jaakko Heinonen wrote:
> Does following patch look reasonable?
>
> - Fix style bugs introduced in r201773.
> - Change the type of nodes_max to u_int and use "%u" format string to
> convert its value.
> Index: sys/fs/tmpfs/tmpfs_vfsops.c
> ===================================================================
> --- sys/fs/tmpfs/tmpfs_vfsops.c (revision 201818)
> +++ sys/fs/tmpfs/tmpfs_vfsops.c (working copy)
> @@ -239,7 +239,7 @@ tmpfs_mount(struct mount *mp)
> * allowed to use, based on the maximum size the user passed in
> * the mount structure. A value of zero is treated as if the
> * maximum available space was requested. */
> - if (size_max < PAGE_SIZE || size_max > (SIZE_MAX - PAGE_SIZE))
> + if (size_max < PAGE_SIZE || size_max > SIZE_MAX - PAGE_SIZE)
> pages = SIZE_MAX;
I think you should change this to use howmany() (or set size_max and
join the else clause) too.
> else
> pages = howmany(size_max, PAGE_SIZE);
OK. Gleb Kurtsou reported a more interesting problem related to large
values of `pages' being too large. I'll let you look at this... IIRC
he made the byte limit UINT_MAX. Perhaps it should be a small fraction
of the address space (UINT_MAX is still larger than physically possible
for 32-bit systems).
Bruce
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