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| author | Dave Chinner <dchinner@redhat.com> | 2012-04-23 15:58:56 +1000 |
|---|---|---|
| committer | Ben Myers <bpm@sgi.com> | 2012-05-14 16:20:52 -0500 |
| commit | aa5c158ec97bd4014f47a2bc0150fb6b20e6c48b (patch) | |
| tree | 8c79791167a5d659949952ad11a08ce325eb025c /fs/xfs/xfs_buf.h | |
| parent | 7ca790a507a9288ebedab90a8e40b9afa8e4e949 (diff) | |
| download | op-kernel-dev-aa5c158ec97bd4014f47a2bc0150fb6b20e6c48b.zip op-kernel-dev-aa5c158ec97bd4014f47a2bc0150fb6b20e6c48b.tar.gz | |
xfs: kill XBF_DONTBLOCK
Just about all callers of xfs_buf_read() and xfs_buf_get() use XBF_DONTBLOCK.
This is used to make memory allocation use GFP_NOFS rather than GFP_KERNEL to
avoid recursion through memory reclaim back into the filesystem.
All the blocking get calls in growfs occur inside a transaction, even though
they are no part of the transaction, so all allocation will be GFP_NOFS due to
the task flag PF_TRANS being set. The blocking read calls occur during log
recovery, so they will probably be unaffected by converting to GFP_NOFS
allocations.
Hence make XBF_DONTBLOCK behaviour always occur for buffers and kill the flag.
Signed-off-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Mark Tinguely <tinguely@sgi.com>
Signed-off-by: Ben Myers <bpm@sgi.com>
Diffstat (limited to 'fs/xfs/xfs_buf.h')
| -rw-r--r-- | fs/xfs/xfs_buf.h | 2 |
1 files changed, 0 insertions, 2 deletions
diff --git a/fs/xfs/xfs_buf.h b/fs/xfs/xfs_buf.h index 512d9a6..846dee3 100644 --- a/fs/xfs/xfs_buf.h +++ b/fs/xfs/xfs_buf.h @@ -53,7 +53,6 @@ typedef enum { /* flags used only as arguments to access routines */ #define XBF_TRYLOCK (1 << 16)/* lock requested, but do not wait */ -#define XBF_DONT_BLOCK (1 << 17)/* do not block in current thread */ /* flags used only internally */ #define _XBF_PAGES (1 << 20)/* backed by refcounted pages */ @@ -74,7 +73,6 @@ typedef unsigned int xfs_buf_flags_t; { XBF_FUA, "FUA" }, \ { XBF_FLUSH, "FLUSH" }, \ { XBF_TRYLOCK, "TRYLOCK" }, /* should never be set */\ - { XBF_DONT_BLOCK, "DONT_BLOCK" }, /* ditto */\ { _XBF_PAGES, "PAGES" }, \ { _XBF_KMEM, "KMEM" }, \ { _XBF_DELWRI_Q, "DELWRI_Q" } |
