From: kanoj@google.engr.sgi.com (Kanoj Sarcar)
To: Linux-MM@kvack.org
Cc: torvalds@transmeta.com, number6@the-village.bc.nu
Subject: [PATCH] kanoj-mm2.0-2.2.9 unneccesary page force in by munlock
Date: Sun, 16 May 1999 21:02:04 -0700 (PDT) [thread overview]
Message-ID: <199905170402.VAA25069@google.engr.sgi.com> (raw)
While looking at the code for munlock() in mm/mlock.c, I found
that munlock() unneccesarily executes a code path that forces
page fault in over the entire range. The following patch fixes
this problem:
--- /usr/tmp/p_rdiff_a007Qs/mlock.c Sun May 16 20:48:12 1999
+++ mm/mlock.c Sun May 16 20:47:01 1999
@@ -117,8 +117,9 @@
pages = (end - start) >> PAGE_SHIFT;
if (!(newflags & VM_LOCKED))
pages = -pages;
+ else
+ make_pages_present(start, end);
vma->vm_mm->locked_vm += pages;
- make_pages_present(start, end);
}
return retval;
}
Please review and include in the source.
Thanks.
Kanoj
kanoj@engr.sgi.com
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next reply other threads:[~1999-05-17 4:03 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
1999-05-17 4:02 Kanoj Sarcar [this message]
1999-05-17 4:48 ` Linus Torvalds
1999-05-17 6:16 ` Kanoj Sarcar
1999-05-17 16:11 ` Linus Torvalds
1999-05-17 17:31 ` Kanoj Sarcar
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