From: Hugh Dickins <hugh@veritas.com>
To: Linus Torvalds <torvalds@osdl.org>
Cc: Andrew Morton <akpm@osdl.org>, Randy Dunlap <rddunlap@osdl.org>,
Leann Ogasawara <ogasawara@osdl.org>,
<linux-kernel@vger.kernel.org>
Subject: [PATCH] revert to static = {0}
Date: Tue, 5 Aug 2003 16:48:02 +0100 (BST) [thread overview]
Message-ID: <Pine.LNX.4.44.0308051638040.1471-100000@localhost.localdomain> (raw)
Please revert to static zero initialization of a const: when thus
initialized it's linked into a readonly cacheline shared between cpus;
otherwise it's linked into bss, likely to be in a dirty cacheline
bouncing between cpus.
--- 2.6.0-test2-bk/mm/shmem.c Tue Aug 5 15:57:31 2003
+++ linux/mm/shmem.c Tue Aug 5 16:16:55 2003
@@ -296,7 +296,7 @@
struct shmem_sb_info *sbinfo = SHMEM_SB(inode->i_sb);
struct page *page = NULL;
swp_entry_t *entry;
- static const swp_entry_t unswapped;
+ static const swp_entry_t unswapped = {0};
if (sgp != SGP_WRITE &&
((loff_t) index << PAGE_CACHE_SHIFT) >= i_size_read(inode))
next reply other threads:[~2003-08-05 15:46 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-08-05 15:48 Hugh Dickins [this message]
2003-08-05 16:07 ` [PATCH] revert to static = {0} Arjan van de Ven
2003-08-05 18:41 ` [PATCH] revert to static = {0} + comment Hugh Dickins
2003-08-05 16:09 ` [PATCH] revert to static = {0} Randy.Dunlap
2003-08-05 18:49 ` Hugh Dickins
2003-08-05 16:18 ` Lou Langholtz
2003-08-05 17:44 ` Jeff Garzik
2003-08-05 18:51 ` Hugh Dickins
2003-08-05 19:06 ` William Lee Irwin III
2003-08-05 21:13 ` Jeff Garzik
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