public inbox for linux-xfs@vger.kernel.org
 help / color / mirror / Atom feed
From: Dave Chinner <david@fromorbit.com>
To: xfs@oss.sgi.com
Subject: [PATCH 5/5] xfs: fix missing KM_NOFS tags to keep lockdep happy
Date: Fri, 17 May 2013 11:10:29 +1000	[thread overview]
Message-ID: <1368753029-9977-6-git-send-email-david@fromorbit.com> (raw)
In-Reply-To: <1368753029-9977-1-git-send-email-david@fromorbit.com>

From: Dave Chinner <dchinner@redhat.com>

There are several places where we use KM_SLEEP allocation contexts
and use the fact that there are called from transaction context to
add KM_NOFS where appropriate. Unfortunately, there are several
places where the code makes this assumption but can be called from
outside transaction context but with filesystem locks held. These
places need explicit KM_NOFS annotations to avoid lockdep
complaining about reclaim contexts.

Signed-off-by: Dave Chinner <dchinner@redhat.com>
---
 fs/xfs/xfs_buf.c       |    2 +-
 fs/xfs/xfs_da_btree.c  |    6 ++++--
 fs/xfs/xfs_dir2_leaf.c |    2 +-
 fs/xfs/xfs_log_cil.c   |    2 +-
 4 files changed, 7 insertions(+), 5 deletions(-)

diff --git a/fs/xfs/xfs_buf.c b/fs/xfs/xfs_buf.c
index 82b70bd..0d25542 100644
--- a/fs/xfs/xfs_buf.c
+++ b/fs/xfs/xfs_buf.c
@@ -1649,7 +1649,7 @@ xfs_alloc_buftarg(
 {
 	xfs_buftarg_t		*btp;
 
-	btp = kmem_zalloc(sizeof(*btp), KM_SLEEP);
+	btp = kmem_zalloc(sizeof(*btp), KM_SLEEP | KM_NOFS);
 
 	btp->bt_mount = mp;
 	btp->bt_dev =  bdev->bd_dev;
diff --git a/fs/xfs/xfs_da_btree.c b/fs/xfs/xfs_da_btree.c
index 9b26a99..41ea7e1 100644
--- a/fs/xfs/xfs_da_btree.c
+++ b/fs/xfs/xfs_da_btree.c
@@ -2464,7 +2464,8 @@ xfs_buf_map_from_irec(
 	ASSERT(nirecs >= 1);
 
 	if (nirecs > 1) {
-		map = kmem_zalloc(nirecs * sizeof(struct xfs_buf_map), KM_SLEEP);
+		map = kmem_zalloc(nirecs * sizeof(struct xfs_buf_map),
+				  KM_SLEEP | KM_NOFS);
 		if (!map)
 			return ENOMEM;
 		*mapp = map;
@@ -2520,7 +2521,8 @@ xfs_dabuf_map(
 		 * Optimize the one-block case.
 		 */
 		if (nfsb != 1)
-			irecs = kmem_zalloc(sizeof(irec) * nfsb, KM_SLEEP);
+			irecs = kmem_zalloc(sizeof(irec) * nfsb,
+					    KM_SLEEP | KM_NOFS);
 
 		nirecs = nfsb;
 		error = xfs_bmapi_read(dp, (xfs_fileoff_t)bno, nfsb, irecs,
diff --git a/fs/xfs/xfs_dir2_leaf.c b/fs/xfs/xfs_dir2_leaf.c
index 721ba2f..da71a18 100644
--- a/fs/xfs/xfs_dir2_leaf.c
+++ b/fs/xfs/xfs_dir2_leaf.c
@@ -1336,7 +1336,7 @@ xfs_dir2_leaf_getdents(
 				     mp->m_sb.sb_blocksize);
 	map_info = kmem_zalloc(offsetof(struct xfs_dir2_leaf_map_info, map) +
 				(length * sizeof(struct xfs_bmbt_irec)),
-			       KM_SLEEP);
+			       KM_SLEEP | KM_NOFS);
 	map_info->map_size = length;
 
 	/*
diff --git a/fs/xfs/xfs_log_cil.c b/fs/xfs/xfs_log_cil.c
index e3d0b85..d0833b5 100644
--- a/fs/xfs/xfs_log_cil.c
+++ b/fs/xfs/xfs_log_cil.c
@@ -139,7 +139,7 @@ xlog_cil_prepare_log_vecs(
 
 		new_lv = kmem_zalloc(sizeof(*new_lv) +
 				niovecs * sizeof(struct xfs_log_iovec),
-				KM_SLEEP);
+				KM_SLEEP|KM_NOFS);
 
 		/* The allocated iovec region lies beyond the log vector. */
 		new_lv->lv_iovecp = (struct xfs_log_iovec *)&new_lv[1];
-- 
1.7.10.4

_______________________________________________
xfs mailing list
xfs@oss.sgi.com
http://oss.sgi.com/mailman/listinfo/xfs

  parent reply	other threads:[~2013-05-17  1:12 UTC|newest]

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2013-05-17  1:10 [PATCH 0/5] xfs: fixes for 3.10-rc2 Dave Chinner
2013-05-17  1:10 ` [PATCH 1/5] xfs: fix sub-page blocksize data integrity writes Dave Chinner
2013-05-17  1:10 ` [PATCH 2/5] xfs: fix rounding in xfs_free_file_space Dave Chinner
2013-05-17  1:10 ` [PATCH 3/5] xfs: Don't reference the EFI after it is freed Dave Chinner
2013-05-17  1:10 ` [PATCH 4/5] xfs: avoid nesting transactions in xfs_qm_scall_setqlim() Dave Chinner
2013-05-17  1:10 ` Dave Chinner [this message]
2013-05-17 10:15 ` [PATCH 6/5] xfs: xfs_da3_node_read_verify() doesn't handle XFS_ATTR3_LEAF_MAGIC Dave Chinner
2013-05-17 21:43 ` [PATCH 0/5] xfs: fixes for 3.10-rc2 Ben Myers

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=1368753029-9977-6-git-send-email-david@fromorbit.com \
    --to=david@fromorbit.com \
    --cc=xfs@oss.sgi.com \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox