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[PATCH] invalidate_inode_pages2_range() debug

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A failure in invalidate_inode_pages2_range() can result in unpleasant things
happening in NFS (at least).  Stick a WARN_ON_ONCE() in there so we can find
out if it happens, and maybe why.

(akpm: might be a -mm-only patch, we'll see..)

Cc: Chuck Lever <chuck.lever@oracle.com>
Cc: Trond Myklebust <Trond.Myklebust@netapp.com>
Cc: Steve Dickson <SteveD@redhat.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Andrew Morton 2006-10-11 01:21:53 -07:00 committed by Linus Torvalds
parent beed33a816
commit 8258d4a574
1 changed files with 1 additions and 0 deletions
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mm/truncate.c
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@ -396,6 +396,7 @@ int invalidate_inode_pages2_range(struct address_space *mapping,
pagevec_release(&pvec);
cond_resched();
}
WARN_ON_ONCE(ret);
return ret;
}
EXPORT_SYMBOL_GPL(invalidate_inode_pages2_range);