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NFS: Prevent another deadlock in nfs_release_page()
We should not attempt to free the page if __GFP_FS is not set. Otherwise we can deadlock as per http://bugzilla.kernel.org/show_bug.cgi?id=15578 Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com> Cc: stable@kernel.org
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1 changed files with 2 additions and 1 deletions
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@ -491,7 +491,8 @@ static int nfs_release_page(struct page *page, gfp_t gfp)
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{
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dfprintk(PAGECACHE, "NFS: release_page(%p)\n", page);
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if (gfp & __GFP_WAIT)
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/* Only do I/O if gfp is a superset of GFP_KERNEL */
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if ((gfp & GFP_KERNEL) == GFP_KERNEL)
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nfs_wb_page(page->mapping->host, page);
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/* If PagePrivate() is set, then the page is not freeable */
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if (PagePrivate(page))
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