diff options
author | Trond Myklebust <trond.myklebust@primarydata.com> | 2017-08-01 18:53:49 +0300 |
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committer | Trond Myklebust <trond.myklebust@primarydata.com> | 2017-08-15 18:54:47 +0300 |
commit | e824f99adaaf1ed0e03eac8574599af6d992163d (patch) | |
tree | c5d2716566d21f023bd278dae6a92a06cbe72816 /fs/nfs/pnfs_nfs.c | |
parent | b30d2f04c35d539bf8003b3e014c389abefc249b (diff) | |
download | linux-e824f99adaaf1ed0e03eac8574599af6d992163d.tar.xz |
NFSv4: Use a mutex to protect the per-inode commit lists
The commit lists can get very large, so using the inode->i_lock can
end up affecting general metadata performance.
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
Diffstat (limited to 'fs/nfs/pnfs_nfs.c')
-rw-r--r-- | fs/nfs/pnfs_nfs.c | 15 |
1 files changed, 7 insertions, 8 deletions
diff --git a/fs/nfs/pnfs_nfs.c b/fs/nfs/pnfs_nfs.c index 25f28fa64c57..2cdee8ce2094 100644 --- a/fs/nfs/pnfs_nfs.c +++ b/fs/nfs/pnfs_nfs.c @@ -98,14 +98,13 @@ pnfs_generic_transfer_commit_list(struct list_head *src, struct list_head *dst, if (!nfs_lock_request(req)) continue; kref_get(&req->wb_kref); - if (cond_resched_lock(&cinfo->inode->i_lock)) - list_safe_reset_next(req, tmp, wb_list); nfs_request_remove_commit_list(req, cinfo); clear_bit(PG_COMMIT_TO_DS, &req->wb_flags); nfs_list_add_request(req, dst); ret++; if ((ret == max) && !cinfo->dreq) break; + cond_resched(); } return ret; } @@ -119,7 +118,7 @@ pnfs_generic_scan_ds_commit_list(struct pnfs_commit_bucket *bucket, struct list_head *dst = &bucket->committing; int ret; - lockdep_assert_held(&cinfo->inode->i_lock); + lockdep_assert_held(&NFS_I(cinfo->inode)->commit_mutex); ret = pnfs_generic_transfer_commit_list(src, dst, cinfo, max); if (ret) { cinfo->ds->nwritten -= ret; @@ -142,7 +141,7 @@ int pnfs_generic_scan_commit_lists(struct nfs_commit_info *cinfo, { int i, rv = 0, cnt; - lockdep_assert_held(&cinfo->inode->i_lock); + lockdep_assert_held(&NFS_I(cinfo->inode)->commit_mutex); for (i = 0; i < cinfo->ds->nbuckets && max != 0; i++) { cnt = pnfs_generic_scan_ds_commit_list(&cinfo->ds->buckets[i], cinfo, max); @@ -162,7 +161,7 @@ void pnfs_generic_recover_commit_reqs(struct list_head *dst, int nwritten; int i; - lockdep_assert_held(&cinfo->inode->i_lock); + lockdep_assert_held(&NFS_I(cinfo->inode)->commit_mutex); restart: for (i = 0, b = cinfo->ds->buckets; i < cinfo->ds->nbuckets; i++, b++) { nwritten = pnfs_generic_transfer_commit_list(&b->written, @@ -953,12 +952,12 @@ pnfs_layout_mark_request_commit(struct nfs_page *req, struct list_head *list; struct pnfs_commit_bucket *buckets; - spin_lock(&cinfo->inode->i_lock); + mutex_lock(&NFS_I(cinfo->inode)->commit_mutex); buckets = cinfo->ds->buckets; list = &buckets[ds_commit_idx].written; if (list_empty(list)) { if (!pnfs_is_valid_lseg(lseg)) { - spin_unlock(&cinfo->inode->i_lock); + mutex_unlock(&NFS_I(cinfo->inode)->commit_mutex); cinfo->completion_ops->resched_write(cinfo, req); return; } @@ -975,7 +974,7 @@ pnfs_layout_mark_request_commit(struct nfs_page *req, cinfo->ds->nwritten++; nfs_request_add_commit_list_locked(req, list, cinfo); - spin_unlock(&cinfo->inode->i_lock); + mutex_unlock(&NFS_I(cinfo->inode)->commit_mutex); nfs_mark_page_unstable(req->wb_page, cinfo); } EXPORT_SYMBOL_GPL(pnfs_layout_mark_request_commit); |