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1 | /*****************************************************************************\ |
2 | * Copyright (C) 2007-2010 Lawrence Livermore National Security, LLC. | |
3 | * Copyright (C) 2007 The Regents of the University of California. | |
4 | * Produced at Lawrence Livermore National Laboratory (cf, DISCLAIMER). | |
5 | * Written by Brian Behlendorf <behlendorf1@llnl.gov>. | |
6 | * UCRL-CODE-235197 | |
7 | * | |
8 | * This file is part of the SPL, Solaris Porting Layer. | |
d956cfac | 9 | * For details, see <http://zfsonlinux.org/>. |
716154c5 BB |
10 | * |
11 | * The SPL is free software; you can redistribute it and/or modify it | |
12 | * under the terms of the GNU General Public License as published by the | |
13 | * Free Software Foundation; either version 2 of the License, or (at your | |
14 | * option) any later version. | |
15 | * | |
16 | * The SPL is distributed in the hope that it will be useful, but WITHOUT | |
17 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
18 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
19 | * for more details. | |
20 | * | |
21 | * You should have received a copy of the GNU General Public License along | |
22 | * with the SPL. If not, see <http://www.gnu.org/licenses/>. | |
23 | \*****************************************************************************/ | |
24 | ||
a713518f | 25 | #ifndef _SPL_DNLC_H |
26 | #define _SPL_DNLC_H | |
27 | ||
e76f4bf1 BB |
28 | /* |
29 | * Reduce the dcache and icache then reap the free'd slabs. Note the | |
30 | * interface takes a reclaim percentage but we don't have easy access to | |
31 | * the total number of entries to calculate the reclaim count. However, | |
32 | * in practice this doesn't need to be even close to correct. We simply | |
33 | * need to reclaim some useful fraction of the cache. The caller can | |
34 | * determine if more needs to be done. | |
35 | */ | |
36 | static inline void | |
37 | dnlc_reduce_cache(void *reduce_percent) | |
38 | { | |
39 | int nr = (uintptr_t)reduce_percent * 10000; | |
40 | ||
41 | shrink_dcache_memory(nr, GFP_KERNEL); | |
42 | shrink_icache_memory(nr, GFP_KERNEL); | |
43 | kmem_reap(); | |
44 | } | |
36b313da | 45 | |
a713518f | 46 | #endif /* SPL_DNLC_H */ |