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authorAnton Altaparmakov <aia21@cam.ac.uk>2007-10-12 12:37:15 +0400
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-10-12 20:16:30 +0400
commitbfab36e81611e60573b84eb4e4b4c8d8545b2320 (patch)
treeacd151a4c85459dcd2f6575ceb385090ebaaf984 /fs/ntfs/inode.c
parentf26e51f67ae6a75ffc57b96cf5fe096f75e778cb (diff)
downloadlinux-bfab36e81611e60573b84eb4e4b4c8d8545b2320.tar.xz
NTFS: Fix a mount time deadlock.
Big thanks go to Mathias Kolehmainen for reporting the bug, providing debug output and testing the patches I sent him to get it working. The fix was to stop calling ntfs_attr_set() at mount time as that causes balance_dirty_pages_ratelimited() to be called which on systems with little memory actually tries to go and balance the dirty pages which tries to take the s_umount semaphore but because we are still in fill_super() across which the VFS holds s_umount for writing this results in a deadlock. We now do the dirty work by hand by submitting individual buffers. This has the annoying "feature" that mounting can take a few seconds if the journal is large as we have clear it all. One day someone should improve on this by deferring the journal clearing to a helper kernel thread so it can be done in the background but I don't have time for this at the moment and the current solution works fine so I am leaving it like this for now. Signed-off-by: Anton Altaparmakov <aia21@cantab.net> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'fs/ntfs/inode.c')
-rw-r--r--fs/ntfs/inode.c3
1 files changed, 0 insertions, 3 deletions
diff --git a/fs/ntfs/inode.c b/fs/ntfs/inode.c
index b532a730cec2..e9da092e2772 100644
--- a/fs/ntfs/inode.c
+++ b/fs/ntfs/inode.c
@@ -34,7 +34,6 @@
#include "dir.h"
#include "debug.h"
#include "inode.h"
-#include "attrib.h"
#include "lcnalloc.h"
#include "malloc.h"
#include "mft.h"
@@ -2500,8 +2499,6 @@ retry_truncate:
/* Resize the attribute record to best fit the new attribute size. */
if (new_size < vol->mft_record_size &&
!ntfs_resident_attr_value_resize(m, a, new_size)) {
- unsigned long flags;
-
/* The resize succeeded! */
flush_dcache_mft_record_page(ctx->ntfs_ino);
mark_mft_record_dirty(ctx->ntfs_ino);