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SubjectRe: [PATCH 2/9] swap_info: change to array of pointers
Hugh Dickins wrote:
> The swap_info_struct is only 76 or 104 bytes, but it does seem wrong
> to reserve an array of about 30 of them in bss, when most people will
> want only one. Change swap_info[] to an array of pointers.
> That does need a "type" field in the structure: pack it as a char with
> next type and short prio (aha, char is unsigned by default on PowerPC).
> Use the (admittedly peculiar) name "type" throughout for this index.
> /proc/swaps does not take swap_lock: I wouldn't want it to, but do take
> care with barriers when adding a new item to the array (never removed).
> Signed-off-by: Hugh Dickins <>

Acked-by: Rik van Riel <>

All rights reversed.

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