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xfs: fix missing KM_NOFS tags to keep lockdep happy 

There are several places where we use KM_SLEEP allocation contexts
and use the fact that they 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>
Reviewed-by: Ben Myers <bpm@sgi.com>
Signed-off-by: Ben Myers <bpm@sgi.com>

(cherry picked from commit ac14876cf9255175bf3bdad645bf8aa2b8fb2d7c)
This commit is contained in:
Dave Chinner 2013-05-20 09:51:12 +10:00 committed by Ben Myers
parent 509e708a89
commit b17cb364db
4 changed files with 7 additions and 5 deletions
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2
fs/xfs/xfs_buf.c
View File

@ -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;

6
fs/xfs/xfs_da_btree.c
View File

@ -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,

2
fs/xfs/xfs_dir2_leaf.c
View File

@ -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;
/*

2
fs/xfs/xfs_log_cil.c
View File

@ -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];