From: Rik van Riel <riel@conectiva.com.br>
To: Linus Torvalds <torvalds@transmeta.com>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>,
Mike Galbraith <mikeg@wen-online.de>,
linux-kernel@vger.kernel.org, linux-mm@kvack.org
Subject: [PATCH] add PF_MEMALLOC to __alloc_pages()
Date: Wed, 3 Jan 2001 13:03:27 -0200 (BRDT) [thread overview]
Message-ID: <Pine.LNX.4.21.0101031258070.1403-100000@duckman.distro.conectiva> (raw)
Hi Linus, Alan, Mike,
the following patch sets PF_MEMALLOC for the current task
in __alloc_pages() to avoid infinite recursion when we try
to free memory from __alloc_pages().
Please apply the patch below, which fixes this (embarrasing)
bug...
regards,
Rik
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--- linux-2.4.0-prerelease/mm/page_alloc.c.orig Wed Jan 3 12:52:13 2001
+++ linux-2.4.0-prerelease/mm/page_alloc.c Wed Jan 3 13:01:19 2001
@@ -427,7 +427,9 @@
if (order > 0 && (gfp_mask & __GFP_WAIT)) {
zone = zonelist->zones;
/* First, clean some dirty pages. */
+ current->flags |= PF_MEMALLOC;
page_launder(gfp_mask, 1);
+ current->flags &= ~PF_MEMALLOC;
for (;;) {
zone_t *z = *(zone++);
if (!z)
@@ -475,7 +477,9 @@
* free ourselves...
*/
} else if (gfp_mask & __GFP_WAIT) {
+ current->flags |= PF_MEMALLOC;
try_to_free_pages(gfp_mask);
+ current->flags &= ~PF_MEMALLOC;
memory_pressure++;
if (!order)
goto try_again;
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next reply other threads:[~2001-01-03 15:03 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-01-03 15:03 Rik van Riel [this message]
2001-01-03 23:03 ` Zlatko Calusic
2001-01-04 13:34 ` Rik van Riel
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