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nfs: clear_request_commit while holding i_lock

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Signed-off-by: Weston Andros Adamson <dros@primarydata.com>
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
This commit is contained in:
Weston Andros Adamson 2014-07-17 20:42:19 -04:00 committed by Trond Myklebust
parent e6cf82d183
commit 411a99adff
2 changed files with 6 additions and 14 deletions
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5
fs/nfs/filelayout/filelayout.c
View File

@ -1009,6 +1009,7 @@ static u32 select_bucket_index(struct nfs4_filelayout_segment *fl, u32 j)
/* The generic layer is about to remove the req from the commit list.
* If this will make the bucket empty, it will need to put the lseg reference.
* Note this is must be called holding the inode (/cinfo) lock
*/
static void
filelayout_clear_request_commit(struct nfs_page *req,
@ -1016,7 +1017,6 @@ filelayout_clear_request_commit(struct nfs_page *req,
{
struct pnfs_layout_segment *freeme = NULL;
spin_lock(cinfo->lock);
if (!test_and_clear_bit(PG_COMMIT_TO_DS, &req->wb_flags))
goto out;
cinfo->ds->nwritten--;
@ -1031,8 +1031,7 @@ filelayout_clear_request_commit(struct nfs_page *req,
}
out:
nfs_request_remove_commit_list(req, cinfo);
spin_unlock(cinfo->lock);
pnfs_put_lseg(freeme);
pnfs_put_lseg_async(freeme);
}
static void

15
fs/nfs/write.c
View File

@ -404,8 +404,6 @@ nfs_destroy_unlinked_subrequests(struct nfs_page *destroy_list,
subreq->wb_head = subreq;
subreq->wb_this_page = subreq;
nfs_clear_request_commit(subreq);
/* subreq is now totally disconnected from page group or any
* write / commit lists. last chance to wake any waiters */
nfs_unlock_request(subreq);
@ -515,7 +513,7 @@ nfs_lock_and_join_requests(struct page *page, bool nonblock)
* Commit list removal accounting is done after locks are dropped */
subreq = head;
do {
nfs_list_remove_request(subreq);
nfs_clear_request_commit(subreq);
subreq = subreq->wb_this_page;
} while (subreq != head);
@ -545,15 +543,11 @@ nfs_lock_and_join_requests(struct page *page, bool nonblock)
nfs_page_group_unlock(head);
/* drop lock to clear_request_commit the head req and clean up
* requests on destroy list */
/* drop lock to clean uprequests on destroy list */
spin_unlock(&inode->i_lock);
nfs_destroy_unlinked_subrequests(destroy_list, head);
/* clean up commit list state */
nfs_clear_request_commit(head);
/* still holds ref on head from nfs_page_find_head_request_locked
* and still has lock on head from lock loop */
return head;
@ -837,6 +831,7 @@ nfs_clear_page_commit(struct page *page)
dec_bdi_stat(page_file_mapping(page)->backing_dev_info, BDI_RECLAIMABLE);
}
/* Called holding inode (/cinfo) lock */
static void
nfs_clear_request_commit(struct nfs_page *req)
{
@ -846,9 +841,7 @@ nfs_clear_request_commit(struct nfs_page *req)
nfs_init_cinfo_from_inode(&cinfo, inode);
if (!pnfs_clear_request_commit(req, &cinfo)) {
spin_lock(cinfo.lock);
nfs_request_remove_commit_list(req, &cinfo);
spin_unlock(cinfo.lock);
}
nfs_clear_page_commit(req->wb_page);
}
@ -1061,9 +1054,9 @@ static struct nfs_page *nfs_try_to_update_request(struct inode *inode,
else
req->wb_bytes = rqend - req->wb_offset;
out_unlock:
spin_unlock(&inode->i_lock);
if (req)
nfs_clear_request_commit(req);
spin_unlock(&inode->i_lock);
return req;
out_flushme:
spin_unlock(&inode->i_lock);