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0ce3d74450
Pass the node of the current zone being reclaimed to shrink_slab(), allowing the shrinker control nodemask to be set appropriately for node aware shrinkers. Signed-off-by: Dave Chinner <dchinner@redhat.com> Signed-off-by: Glauber Costa <glommer@openvz.org> Acked-by: Mel Gorman <mgorman@suse.de> Cc: "Theodore Ts'o" <tytso@mit.edu> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Al Viro <viro@zeniv.linux.org.uk> Cc: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Cc: Arve Hjønnevåg <arve@android.com> Cc: Carlos Maiolino <cmaiolino@redhat.com> Cc: Christoph Hellwig <hch@lst.de> Cc: Chuck Lever <chuck.lever@oracle.com> Cc: Daniel Vetter <daniel.vetter@ffwll.ch> Cc: David Rientjes <rientjes@google.com> Cc: Gleb Natapov <gleb@redhat.com> Cc: Greg Thelen <gthelen@google.com> Cc: J. Bruce Fields <bfields@redhat.com> Cc: Jan Kara <jack@suse.cz> Cc: Jerome Glisse <jglisse@redhat.com> Cc: John Stultz <john.stultz@linaro.org> Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Cc: Kent Overstreet <koverstreet@google.com> Cc: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Cc: Marcelo Tosatti <mtosatti@redhat.com> Cc: Mel Gorman <mgorman@suse.de> Cc: Steven Whitehouse <swhiteho@redhat.com> Cc: Thomas Hellstrom <thellstrom@vmware.com> Cc: Trond Myklebust <Trond.Myklebust@netapp.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
69 lines
1.5 KiB
C
69 lines
1.5 KiB
C
/*
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* Implement the manual drop-all-pagecache function
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*/
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#include <linux/kernel.h>
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#include <linux/mm.h>
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#include <linux/fs.h>
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#include <linux/writeback.h>
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#include <linux/sysctl.h>
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#include <linux/gfp.h>
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#include "internal.h"
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/* A global variable is a bit ugly, but it keeps the code simple */
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int sysctl_drop_caches;
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static void drop_pagecache_sb(struct super_block *sb, void *unused)
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{
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struct inode *inode, *toput_inode = NULL;
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spin_lock(&inode_sb_list_lock);
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list_for_each_entry(inode, &sb->s_inodes, i_sb_list) {
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spin_lock(&inode->i_lock);
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if ((inode->i_state & (I_FREEING|I_WILL_FREE|I_NEW)) ||
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(inode->i_mapping->nrpages == 0)) {
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spin_unlock(&inode->i_lock);
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continue;
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}
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__iget(inode);
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spin_unlock(&inode->i_lock);
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spin_unlock(&inode_sb_list_lock);
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invalidate_mapping_pages(inode->i_mapping, 0, -1);
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iput(toput_inode);
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toput_inode = inode;
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spin_lock(&inode_sb_list_lock);
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}
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spin_unlock(&inode_sb_list_lock);
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iput(toput_inode);
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}
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static void drop_slab(void)
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{
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int nr_objects;
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struct shrink_control shrink = {
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.gfp_mask = GFP_KERNEL,
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};
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nodes_setall(shrink.nodes_to_scan);
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do {
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nr_objects = shrink_slab(&shrink, 1000, 1000);
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} while (nr_objects > 10);
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}
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int drop_caches_sysctl_handler(ctl_table *table, int write,
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void __user *buffer, size_t *length, loff_t *ppos)
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{
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int ret;
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ret = proc_dointvec_minmax(table, write, buffer, length, ppos);
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if (ret)
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return ret;
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if (write) {
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if (sysctl_drop_caches & 1)
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iterate_supers(drop_pagecache_sb, NULL);
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if (sysctl_drop_caches & 2)
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drop_slab();
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}
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return 0;
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}
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