Date: Mon, 18 Oct 2010 19:06:46 +0000 (UTC) From: Konstantin Belousov <kib@FreeBSD.org> To: cvs-src-old@freebsd.org Subject: cvs commit: src/sys/nfsclient nfs.h nfs_bio.c nfs_nfsiod.c nfsnode.h Message-ID: <201010181907.o9IJ70PX019538@repoman.freebsd.org>
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kib 2010-10-18 19:06:46 UTC
FreeBSD src repository
Modified files:
sys/nfsclient nfs.h nfs_bio.c nfs_nfsiod.c nfsnode.h
Log:
SVN rev 214026 on 2010-10-18 19:06:46Z by kib
Do not synchronously start the nfsiod threads at all. The r212506
fixed the issues with file descriptor locks, but the same problems are
present for vnode lock/user map lock.
If the nfs_asyncio() cannot find the free nfsiod, schedule task to
create new nfsiod and return error. This causes fall back to the
synchronous i/o for nfs_strategy(), or does not start read at all in
the case of readahead. The caller that holds vnode and potentially
user map lock does not wait for kproc_create() to finish, preventing
the LORs.
The change effectively reverts r203072, because we never hand off the
request to newly created nfsiod thread anymore.
Reviewed by: jhb
Tested by: jhb, pluknet
MFC after: 3 weeks
Revision Changes Path
1.113 +1 -1 src/sys/nfsclient/nfs.h
1.188 +9 -17 src/sys/nfsclient/nfs_bio.c
1.99 +37 -58 src/sys/nfsclient/nfs_nfsiod.c
1.71 +1 -4 src/sys/nfsclient/nfsnode.h
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