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NFS: Add a cond_resched() to nfs_commit_release_pages()
commit 7f1bda447c
upstream.
The commit list can get very large, and so we need a cond_resched()
in nfs_commit_release_pages() in order to ensure we don't hog the CPU
for excessive periods of time.
Reported-by: Mike Galbraith <efault@gmx.de>
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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1 changed files with 2 additions and 0 deletions
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@ -1836,6 +1836,8 @@ static void nfs_commit_release_pages(struct nfs_commit_data *data)
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set_bit(NFS_CONTEXT_RESEND_WRITES, &req->wb_context->flags);
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next:
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nfs_unlock_and_release_request(req);
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/* Latency breaker */
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cond_resched();
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}
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nfss = NFS_SERVER(data->inode);
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if (atomic_long_read(&nfss->writeback) < NFS_CONGESTION_OFF_THRESH)
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