The patch titled
From: Nick Piggin <[EMAIL PROTECTED]>
has been removed from the -mm tree. Its filename was
mm-debug-write-deadlocks.patch
This patch was dropped because it is obsolete
------------------------------------------------------
Subject: From: Nick Piggin <[EMAIL PROTECTED]>
From: Nick Piggin <[EMAIL PROTECTED]>
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To: Andrew Morton <[EMAIL PROTECTED]>
Cc: Linux Kernel <[email protected]>,
Linux Filesystems <[email protected]>,
Nick Piggin <[EMAIL PROTECTED]>,
Linux Memory Management <[EMAIL PROTECTED]>
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References: <[EMAIL PROTECTED]>
Subject: [patch 5/9] mm: debug write deadlocks
Date: Sun, 4 Feb 2007 09:50:28 +0100 (CET)
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version=3.0.2
Allow CONFIG_DEBUG_VM to switch off the prefaulting logic, to simulate the
difficult race where the page may be unmapped before calling copy_from_user.
Makes the race much easier to hit.
This is useful for demonstration and testing purposes, but is removed in a
subsequent patch.
Signed-off-by: Nick Piggin <[EMAIL PROTECTED]>
Index: linux-2.6/mm/filemap.c
===================================================================
--- linux-2.6.orig/mm/filemap.c
+++ linux-2.6/mm/filemap.c
@@ -2103,6 +2103,7 @@ generic_file_buffered_write(struct kiocb
if (maxlen > bytes)
maxlen = bytes;
+#ifndef CONFIG_DEBUG_VM
/*
* Bring in the user page that we will copy from _first_.
* Otherwise there's a nasty deadlock on copying from the
@@ -2110,6 +2111,7 @@ generic_file_buffered_write(struct kiocb
* up-to-date.
*/
fault_in_pages_readable(buf, maxlen);
+#endif
page = __grab_cache_page(mapping,index,&cached_page,&lru_pvec);
if (!page) {
Patches currently in -mm which might be from [EMAIL PROTECTED] are
mm-only-mm-debug-write-deadlocks.patch
mm-fix-pagecache-write-deadlocks.patch
mm-fix-pagecache-write-deadlocks-comment.patch
mm-fix-pagecache-write-deadlocks-mm-pagecache-write-deadlocks-efault-fix.patch
mm-fix-pagecache-write-deadlocks-zerolength-fix.patch
mm-fix-pagecache-write-deadlocks-stale-holes-fix.patch
fs-prepare_write-fixes.patch
fs-prepare_write-fixes-fuse-fix.patch
fs-prepare_write-fixes-jffs-fix.patch
fs-prepare_write-fixes-fat-fix.patch
fs-fix-cont-vs-deadlock-patches.patch
git-block.patch
buffer-memorder-fix.patch
sched-avoid-div-in-rebalance_tick.patch
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