Date: Sat, 22 Oct 2005 18:46:38 +0000 (UTC) From: Alan Cox <alc@FreeBSD.org> To: src-committers@FreeBSD.org, cvs-src@FreeBSD.org, cvs-all@FreeBSD.org Subject: cvs commit: src/sys/vm vm_object.c Message-ID: <200510221846.j9MIkcgY025446@repoman.freebsd.org>
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alc 2005-10-22 18:46:38 UTC
FreeBSD src repository
Modified files:
sys/vm vm_object.c
Log:
Use of the ZERO_COPY_SOCKETS options can result in an unusual state that
vm_object_backing_scan() was not written to handle. Specifically, a wired
page within a backing object that is shadowed by a page within the shadow
object. Handle this state by removing the wired page from the backing
object. The wired page will be freed by socow_iodone().
Stop masking errors: If a page is being freed by vm_object_backing_scan(),
assert that it is no longer mapped rather than quietly destroying any
mappings.
Tested by: Harald Schmalzbauer
Revision Changes Path
1.351 +12 -4 src/sys/vm/vm_object.c
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