Searched hist:c487685d7c18a8481900755aa5c56a7a74193101 (Results 1 – 3 of 3) sorted by relevance
| /openbmc/linux/fs/btrfs/ |
| H A D | ctree.c | diff c487685d7c18a8481900755aa5c56a7a74193101 Wed Feb 04 08:24:25 CST 2009 Chris Mason <chris.mason@oracle.com> Btrfs: hash_lock is no longer needed
Before metadata is written to disk, it is updated to reflect that writeout
has begun. Once this update is done, the block must be cow'd before it
can be modified again.
This update was originally synchronized by using a per-fs spinlock. Today
the buffers for the metadata blocks are locked before writeout begins,
and everyone that tests the flag has the buffer locked as well.
So, the per-fs spinlock (called hash_lock for no good reason) is no
longer required.
Signed-off-by: Chris Mason <chris.mason@oracle.com>
|
| H A D | ctree.h | diff c487685d7c18a8481900755aa5c56a7a74193101 Wed Feb 04 08:24:25 CST 2009 Chris Mason <chris.mason@oracle.com> Btrfs: hash_lock is no longer needed
Before metadata is written to disk, it is updated to reflect that writeout
has begun. Once this update is done, the block must be cow'd before it
can be modified again.
This update was originally synchronized by using a per-fs spinlock. Today
the buffers for the metadata blocks are locked before writeout begins,
and everyone that tests the flag has the buffer locked as well.
So, the per-fs spinlock (called hash_lock for no good reason) is no
longer required.
Signed-off-by: Chris Mason <chris.mason@oracle.com>
|
| H A D | disk-io.c | diff c487685d7c18a8481900755aa5c56a7a74193101 Wed Feb 04 08:24:25 CST 2009 Chris Mason <chris.mason@oracle.com> Btrfs: hash_lock is no longer needed
Before metadata is written to disk, it is updated to reflect that writeout
has begun. Once this update is done, the block must be cow'd before it
can be modified again.
This update was originally synchronized by using a per-fs spinlock. Today
the buffers for the metadata blocks are locked before writeout begins,
and everyone that tests the flag has the buffer locked as well.
So, the per-fs spinlock (called hash_lock for no good reason) is no
longer required.
Signed-off-by: Chris Mason <chris.mason@oracle.com>
|