From: Christoph Lameter <clameter@sgi.com>
To: akpm@linux-foundation.org
Cc: linux-mm@kvack.org
Subject: [07/11] vcompound: bit waitqueue support
Date: Tue, 29 Apr 2008 21:42:58 -0700 [thread overview]
Message-ID: <20080430044320.479850443@sgi.com> (raw)
In-Reply-To: <20080430044251.266380837@sgi.com>
[-- Attachment #1: vcp_waitqueue_support --]
[-- Type: text/plain, Size: 1476 bytes --]
If bit_waitqueue is passed a vmalloc address then it must use
vmalloc_head_page() to determine the page struct address.
vmalloc_head_page will fall back to virt_to_page() for physical
addresses. For virtual addresses it will perform a page table lookup
to find the page.
Signed-off-by: Christoph Lameter <clameter@sgi.com>
---
kernel/wait.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
Index: linux-2.6.25-rc8-mm2/kernel/wait.c
===================================================================
--- linux-2.6.25-rc8-mm2.orig/kernel/wait.c 2008-04-01 12:44:26.000000000 -0700
+++ linux-2.6.25-rc8-mm2/kernel/wait.c 2008-04-11 20:23:32.000000000 -0700
@@ -9,6 +9,7 @@
#include <linux/mm.h>
#include <linux/wait.h>
#include <linux/hash.h>
+#include <linux/vmalloc.h>
void init_waitqueue_head(wait_queue_head_t *q)
{
@@ -245,7 +246,7 @@ EXPORT_SYMBOL(wake_up_bit);
wait_queue_head_t *bit_waitqueue(void *word, int bit)
{
const int shift = BITS_PER_LONG == 32 ? 5 : 6;
- const struct zone *zone = page_zone(virt_to_page(word));
+ const struct zone *zone = page_zone(vcompound_head_page(word));
unsigned long val = (unsigned long)word << shift | bit;
return &zone->wait_table[hash_long(val, zone->wait_table_bits)];
--
--
To unsubscribe, send a message with 'unsubscribe linux-mm' in
the body to majordomo@kvack.org. For more info on Linux MM,
see: http://www.linux-mm.org/ .
Don't email: <a href=mailto:"dont@kvack.org"> email@kvack.org </a>
next prev parent reply other threads:[~2008-04-30 4:42 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-04-30 4:42 [00/11] Virtualizable Compound Page Support V5 Christoph Lameter
2008-04-30 4:42 ` [01/11] vmalloc: Return page array on vunmap Christoph Lameter
2008-04-30 4:42 ` [02/11] vcompound: pageflags: Add PageVcompound() Christoph Lameter
2008-04-30 4:42 ` [03/11] vmallocinfo: Support display of virtualized compound pages Christoph Lameter
2008-04-30 4:42 ` [04/11] vcompound: Core piece for virtualizable compound page allocation Christoph Lameter
2008-04-30 4:42 ` [05/11] vcompound: Debugging aid Christoph Lameter
2008-04-30 4:42 ` [06/11] sparsemem: Use virtualizable compound page Christoph Lameter
2008-04-30 4:42 ` Christoph Lameter [this message]
2008-04-30 4:42 ` [08/11] crypto: Use virtualizable compounds for temporary order 2 allocation Christoph Lameter
2008-04-30 4:43 ` [09/11] slub: Use virtualizable compound for buffer Christoph Lameter
2008-04-30 4:43 ` [10/11] vcompound: Fallback for zone wait table Christoph Lameter
2008-04-30 4:43 ` [11/11] e1000: Avoid vmalloc through virtualizable compound page Christoph Lameter
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20080430044320.479850443@sgi.com \
--to=clameter@sgi.com \
--cc=akpm@linux-foundation.org \
--cc=linux-mm@kvack.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox