Date: Wed, 30 Jul 2003 11:55:04 -0700 (PDT) From: Alan Cox <alc@FreeBSD.org> To: src-committers@FreeBSD.org, cvs-src@FreeBSD.org, cvs-all@FreeBSD.org Subject: cvs commit: src/sys/kern sys_pipe.c Message-ID: <200307301855.h6UIt4Mr063436@repoman.freebsd.org>
next in thread | raw e-mail | index | archive | help
alc 2003/07/30 11:55:04 PDT
FreeBSD src repository
Modified files:
sys/kern sys_pipe.c
Log:
The introduction of vm object locking has caused witness to reveal
a long-standing mistake in the way a portion of a pipe's KVA is
allocated. Specifically, kmem_alloc_pageable() is inappropriate
for use in the "direct" case because it allows a preceding vm map entry
and vm object to be extended to support the new KVA allocation.
However, the direct case KVA allocation should not have a backing
vm object. This is corrected by using kmem_alloc_nofault().
Submitted by: tegge (with the above explanation by me)
Revision Changes Path
1.140 +1 -1 src/sys/kern/sys_pipe.c
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?200307301855.h6UIt4Mr063436>