From: Nick Piggin <npiggin@suse.de>
To: Linux Memory Management <linux-mm@kvack.org>,
Andrew Morton <akpm@osdl.org>
Cc: Linux Kernel <linux-kernel@vger.kernel.org>,
Nick Piggin <npiggin@suse.de>
Subject: [patch 1/3] mm: fault vs invalidate/truncate check
Date: Sat, 7 Oct 2006 15:06:12 +0200 (CEST) [thread overview]
Message-ID: <20061007105833.14024.33775.sendpatchset@linux.site> (raw)
In-Reply-To: <20061007105758.14024.70048.sendpatchset@linux.site>
Add a bugcheck for Andrea's pagefault vs invalidate race. This is triggerable
for both linear and nonlinear pages with a userspace test harness (using
direct IO and truncate, respectively).
Signed-off-by: Nick Piggin <npiggin@suse.de>
Index: linux-2.6/mm/filemap.c
===================================================================
--- linux-2.6.orig/mm/filemap.c
+++ linux-2.6/mm/filemap.c
@@ -120,6 +120,8 @@ void __remove_from_page_cache(struct pag
page->mapping = NULL;
mapping->nrpages--;
__dec_zone_page_state(page, NR_FILE_PAGES);
+
+ BUG_ON(page_mapped(page));
}
void remove_from_page_cache(struct page *page)
WARNING: multiple messages have this Message-ID (diff)
From: Nick Piggin <npiggin@suse.de>
To: Linux Memory Management <linux-mm@kvack.org>,
Andrew Morton <akpm@osdl.org>
Cc: Linux Kernel <linux-kernel@vger.kernel.org>,
Nick Piggin <npiggin@suse.de>
Subject: [patch 1/3] mm: fault vs invalidate/truncate check
Date: Sat, 7 Oct 2006 15:06:12 +0200 (CEST) [thread overview]
Message-ID: <20061007105833.14024.33775.sendpatchset@linux.site> (raw)
In-Reply-To: <20061007105758.14024.70048.sendpatchset@linux.site>
Add a bugcheck for Andrea's pagefault vs invalidate race. This is triggerable
for both linear and nonlinear pages with a userspace test harness (using
direct IO and truncate, respectively).
Signed-off-by: Nick Piggin <npiggin@suse.de>
Index: linux-2.6/mm/filemap.c
===================================================================
--- linux-2.6.orig/mm/filemap.c
+++ linux-2.6/mm/filemap.c
@@ -120,6 +120,8 @@ void __remove_from_page_cache(struct pag
page->mapping = NULL;
mapping->nrpages--;
__dec_zone_page_state(page, NR_FILE_PAGES);
+
+ BUG_ON(page_mapped(page));
}
void remove_from_page_cache(struct page *page)
--
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:[~2006-10-07 13:06 UTC|newest]
Thread overview: 98+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-10-07 13:05 [rfc] 2.6.19-rc1: vm stuff Nick Piggin
2006-10-07 13:05 ` Nick Piggin
2006-10-07 13:05 ` [patch 1/3] mm: arch_free_page fix Nick Piggin
2006-10-07 13:05 ` Nick Piggin
2006-10-07 13:05 ` [patch 2/3] mm: locks_freed fix Nick Piggin
2006-10-07 13:05 ` Nick Piggin
2006-10-07 13:06 ` [patch 3/3] mm: add arch_alloc_page Nick Piggin
2006-10-07 13:06 ` Nick Piggin
2006-10-07 20:43 ` Andrew Morton
2006-10-07 20:43 ` Andrew Morton
2006-10-08 1:39 ` Nick Piggin
2006-10-08 1:39 ` Nick Piggin
2006-10-11 14:48 ` Martin Schwidefsky
2006-10-11 14:48 ` Martin Schwidefsky
2006-10-11 14:56 ` Nick Piggin
2006-10-11 14:56 ` Nick Piggin
2006-10-11 15:07 ` Martin Schwidefsky
2006-10-11 15:07 ` Martin Schwidefsky
2006-10-07 13:06 ` Nick Piggin [this message]
2006-10-07 13:06 ` [patch 1/3] mm: fault vs invalidate/truncate check Nick Piggin
2006-10-07 13:06 ` [patch 2/3] mm: fault vs invalidate/truncate race fix Nick Piggin
2006-10-07 13:06 ` Nick Piggin
2006-10-07 20:43 ` Andrew Morton
2006-10-07 20:43 ` Andrew Morton
2006-10-07 20:44 ` Andrew Morton
2006-10-07 20:44 ` Andrew Morton
2006-10-08 2:05 ` Nick Piggin
2006-10-08 2:05 ` Nick Piggin
2006-10-07 13:06 ` [patch 3/3] mm: fault handler to replace nopage and populate Nick Piggin
2006-10-07 13:06 ` Nick Piggin
2006-10-07 15:14 ` Jeff Garzik
2006-10-07 15:14 ` Jeff Garzik
2006-10-08 2:17 ` Nick Piggin
2006-10-08 2:17 ` Nick Piggin
2006-10-07 20:44 ` Andrew Morton
2006-10-07 20:44 ` Andrew Morton
2006-10-08 2:12 ` Nick Piggin
2006-10-08 2:12 ` Nick Piggin
2006-10-08 23:46 ` Benjamin Herrenschmidt
2006-10-08 23:46 ` Benjamin Herrenschmidt
2006-10-09 10:26 ` Nick Piggin
2006-10-09 10:26 ` Nick Piggin
2006-10-09 10:50 ` Benjamin Herrenschmidt
2006-10-09 10:50 ` Benjamin Herrenschmidt
2006-10-09 11:00 ` Nick Piggin
2006-10-09 11:00 ` Nick Piggin
2006-10-09 11:10 ` Benjamin Herrenschmidt
2006-10-09 11:10 ` Benjamin Herrenschmidt
2006-10-09 11:19 ` Nick Piggin
2006-10-09 11:19 ` Nick Piggin
2006-10-09 11:32 ` Benjamin Herrenschmidt
2006-10-09 11:32 ` Benjamin Herrenschmidt
2006-10-09 11:45 ` Nick Piggin
2006-10-09 11:45 ` Nick Piggin
2006-10-09 11:49 ` Benjamin Herrenschmidt
2006-10-09 11:49 ` Benjamin Herrenschmidt
2006-10-09 11:58 ` Nick Piggin
2006-10-09 11:58 ` Nick Piggin
2006-10-09 12:07 ` Benjamin Herrenschmidt
2006-10-09 12:07 ` Benjamin Herrenschmidt
2006-10-09 12:14 ` Nick Piggin
2006-10-09 12:14 ` Nick Piggin
2006-10-09 13:38 ` Thomas Hellstrom
2006-10-09 13:38 ` Thomas Hellstrom
2006-10-09 13:52 ` Nick Piggin
2006-10-09 13:52 ` Nick Piggin
2006-10-09 20:50 ` Benjamin Herrenschmidt
2006-10-09 20:50 ` Benjamin Herrenschmidt
2006-10-10 6:11 ` Thomas Hellström
2006-10-10 6:11 ` Thomas Hellström
2006-10-10 7:55 ` Benjamin Herrenschmidt
2006-10-10 7:55 ` Benjamin Herrenschmidt
2006-10-10 8:39 ` Thomas Hellstrom
2006-10-10 8:39 ` Thomas Hellstrom
2006-10-09 20:45 ` Benjamin Herrenschmidt
2006-10-09 20:45 ` Benjamin Herrenschmidt
2006-10-09 12:09 ` Nick Piggin
2006-10-09 12:09 ` Nick Piggin
2006-10-09 12:11 ` Benjamin Herrenschmidt
2006-10-09 12:11 ` Benjamin Herrenschmidt
2006-10-10 12:10 ` Christoph Hellwig
2006-10-10 12:10 ` Christoph Hellwig
2006-10-10 12:13 ` Nick Piggin
2006-10-10 12:13 ` Nick Piggin
2006-10-10 17:52 ` Andrew Morton
2006-10-10 17:52 ` Andrew Morton
2006-10-11 0:43 ` SPAM: " Nick Piggin
2006-10-11 0:43 ` Nick Piggin
[not found] ` <5c77e7070610120456t1bdaa95cre611080c9c953582@mail.gmail.com>
2006-10-12 12:07 ` Nick Piggin
2006-10-12 12:07 ` Nick Piggin
2006-10-14 13:28 ` Ingo Oeser
2006-10-14 13:28 ` Ingo Oeser
2006-10-15 7:54 ` Nick Piggin
2006-10-15 7:54 ` Nick Piggin
2006-10-24 21:31 ` Dave Airlie
2006-10-24 21:31 ` Dave Airlie
2006-10-26 11:09 ` Nick Piggin
2006-10-26 11:09 ` Nick Piggin
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=20061007105833.14024.33775.sendpatchset@linux.site \
--to=npiggin@suse.de \
--cc=akpm@osdl.org \
--cc=linux-kernel@vger.kernel.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 an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.