From: Rasmus Andersen <rasmus@jaquet.dk>
To: linux-kernel@vger.kernel.org
Subject: [PATCH] limit mmap_cache nulling (2.2.19-7)
Date: Sun, 14 Jan 2001 14:16:55 +0100 [thread overview]
Message-ID: <20010114141655.C604@jaquet.dk> (raw)
Hi.
The following patch against 2.2.19-7 adds checks in do_munmap and
merge_segments to limit the nulling of mmap_cache to the cases where
the cached vma is in the affected area.
Comments?
--- linux-2.2.19-7/mm/mmap.c~ Sun Jan 14 13:43:50 2001
+++ linux-2.2.19-7/mm/mmap.c Sun Jan 14 14:02:04 2001
@@ -689,8 +689,11 @@
kmem_cache_free(vm_area_cachep, extra);
free_pgtables(mm, prev, addr, addr+len);
+
+ if (mm->mmap_cache && mm->mmap_cache->vm_start < addr+len
+ && mm->mmap_cache->vm_end > addr)
+ mm->mmap_cache = NULL; /* Kill the cache. */
- mm->mmap_cache = NULL; /* Kill the cache. */
return 0;
}
@@ -867,7 +870,9 @@
kmem_cache_free(vm_area_cachep, mpnt);
mpnt = prev;
}
- mm->mmap_cache = NULL; /* Kill the cache. */
+ if (mm->mmap_cache && mm->mmap_cache->vm_start < end_addr
+ && mm->mmap_cache->vm_end > start_addr)
+ mm->mmap_cache = NULL; /* Kill the cache. */
}
void __init vma_init(void)
--
Regards,
Rasmus(rasmus@jaquet.dk)
Are they taking DDT?
-- Vice President Dan Quayle asking doctors at a Manhattan
AIDS clinic about their treatments of choice, 4/30/92
(reported in Esquire, 8/92, and NY Post early May 92)
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
Please read the FAQ at http://www.tux.org/lkml/
reply other threads:[~2001-01-14 13:17 UTC|newest]
Thread overview: [no followups] expand[flat|nested] mbox.gz Atom feed
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=20010114141655.C604@jaquet.dk \
--to=rasmus@jaquet.dk \
--cc=linux-kernel@vger.kernel.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;
as well as URLs for NNTP newsgroup(s).