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committed c78f59d7145static int mtdswap_handle_write_error(struct mtdswap_dev *d, struct swap_eb *eb)/* * Swap block device support for MTDs * Turns an MTD device into a swap device with block wear leveling * * Copyright © 2007,2011 Nokia Corporation. All rights reserved. * * Authors: Jarkko Lavinen <jarkko.lavinen@nokia.com> * * Based on Richard Purdie's earlier implementation in 2007. Background * support and lock-less operation written by Adrian Hunter. * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License * version 2 as published by the Free Software Foundation. * * This program is distributed in the hope that it will be useful, but * WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA * 02110-1301 USA *//* * The number of free eraseblocks when GC should stop *//* * Number of free eraseblocks below which GC can also collect low frag * blocks. *//* * Wear level cost amortization. We want to do wear leveling on the background * without disturbing gc too much. This is made by defining max GC frequency. * Frequency value 6 means 1/6 of the GC passes will pick an erase block based * on the biggest wear difference rather than the biggest dirtiness. * * The lower freq2 should be chosen so that it makes sure the maximum erase * difference will decrease even if a malicious application is deliberately * trying to make erase differences large.