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Red Hat Bugzilla – Attachment 304374 Details for
Bug 444961
softlockup when repeatedly dropping caches
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[patch]
Proposed upstream patch to drop inode_lock across __invalidate_mapping_pages
drop_caches-drop-inode_lock.patch (text/plain), 724 bytes, created by
Bryn M. Reeves
on 2008-05-02 11:48:37 UTC
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Description:
Proposed upstream patch to drop inode_lock across __invalidate_mapping_pages
Filename:
MIME Type:
Creator:
Bryn M. Reeves
Created:
2008-05-02 11:48:37 UTC
Size:
724 bytes
patch
obsolete
>diff --git a/fs/drop_caches.c b/fs/drop_caches.c >index 59375ef..f5aae26 100644 >--- a/fs/drop_caches.c >+++ b/fs/drop_caches.c >@@ -14,15 +14,21 @@ int sysctl_drop_caches; > > static void drop_pagecache_sb(struct super_block *sb) > { >- struct inode *inode; >+ struct inode *inode, *toput_inode = NULL; > > spin_lock(&inode_lock); > list_for_each_entry(inode, &sb->s_inodes, i_sb_list) { > if (inode->i_state & (I_FREEING|I_WILL_FREE)) > continue; >+ __iget(inode); >+ spin_unlock(&inode_lock); > __invalidate_mapping_pages(inode->i_mapping, 0, -1, true); >+ iput(toput_inode); >+ toput_inode = inode; >+ spin_lock(&inode_lock); > } > spin_unlock(&inode_lock); >+ iput(toput_inode); > } > > void drop_pagecache(void) >-- >1.5.2.4 >
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