From: Jeff Dike <jdike@addtoit.com>
To: akpm@osdl.org
Cc: linux-xfs@oss.sgi.com, Daniel Phillips <phillips@google.com>,
linux-kernel@vger.kernel.org,
user-mode-linux-devel@lists.sourceforge.net
Subject: [uml-devel] [PATCH 1/2] Add GFP_NOWAIT
Date: Thu, 06 Apr 2006 12:55:22 -0400 [thread overview]
Message-ID: <200604061655.k36GtMvc005146@ccure.user-mode-linux.org> (raw)
Introduce GFP_NOWAIT, as an alias for GFP_ATOMIC & ~__GFP_HIGH.
This also changes XFS, which is the only in-tree user of this idiom that I
could find. The XFS piece is compile-tested only.
Signed-off-by: Jeff Dike <jdike@addtoit.com>
Index: linux-2.6.16/fs/xfs/linux-2.6/xfs_buf.c
===================================================================
--- linux-2.6.16.orig/fs/xfs/linux-2.6/xfs_buf.c 2006-04-06 12:16:14.000000000 -0400
+++ linux-2.6.16/fs/xfs/linux-2.6/xfs_buf.c 2006-04-06 12:16:54.000000000 -0400
@@ -182,7 +182,7 @@ free_address(
{
a_list_t *aentry;
- aentry = kmalloc(sizeof(a_list_t), GFP_ATOMIC & ~__GFP_HIGH);
+ aentry = kmalloc(sizeof(a_list_t), GFP_NOWAIT);
if (likely(aentry)) {
spin_lock(&as_lock);
aentry->next = as_free_head;
Index: linux-2.6.16/include/linux/gfp.h
===================================================================
--- linux-2.6.16.orig/include/linux/gfp.h 2006-03-21 11:50:12.000000000 -0500
+++ linux-2.6.16/include/linux/gfp.h 2006-04-06 12:15:18.000000000 -0400
@@ -57,6 +57,8 @@ struct vm_area_struct;
__GFP_NOFAIL|__GFP_NORETRY|__GFP_NO_GROW|__GFP_COMP| \
__GFP_NOMEMALLOC|__GFP_HARDWALL)
+/* This equals 0, but use constants in case they ever change */
+#define GFP_NOWAIT (GFP_ATOMIC & ~__GFP_HIGH)
/* GFP_ATOMIC means both !wait (__GFP_WAIT not set) and use emergency pool */
#define GFP_ATOMIC (__GFP_HIGH)
#define GFP_NOIO (__GFP_WAIT)
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next reply other threads:[~2006-04-06 17:54 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-04-06 16:55 Jeff Dike [this message]
2006-04-06 22:11 ` [uml-devel] Re: [PATCH 1/2] Add GFP_NOWAIT Nathan Scott
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