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Date: Thu, 15 Oct 2009 01:44:10 +0100 (BST) From: Hugh Dickins <hugh.dickins@...cali.co.uk> To: Andrew Morton <akpm@...ux-foundation.org> cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>, linux-kernel@...r.kernel.org, linux-mm@...ck.org Subject: [PATCH 0/9] swap_info and swap_map patches Here's a series of nine patches around the swap_info_struct: against 2.6.32-rc4, but intended for mmotm, which is currently similar here. They start out with some old and not very important cleanups, but get around to solving the swap count overflow problem: our handling above 32765 has depended on hoping that it won't coincide with other races. That problem exists in theory today (when pid_max is raised from its default), though never reported in practice; but the motivation for solving it now comes from the impending KSM swapping patches - it becomes very easy for anyone to overflow the maximum that way. But most people will never have a swap count overflow in their life: the benefit for them is that the vmalloc'ed swap_map halves in size. This is all internal housekeeping: no change to actual swapping and page reclaim. include/linux/swap.h | 66 ++- mm/memory.c | 19 mm/page_io.c | 19 mm/rmap.c | 6 mm/shmem.c | 11 mm/swapfile.c | 834 +++++++++++++++++++++++++---------------- 6 files changed, 599 insertions(+), 356 deletions(-) Hugh -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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