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[PATCH] knfsd: make sure nfsd doesn't hog a cpu forever

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Being kernel-threads, nfsd servers don't get pre-empted (depending on
CONFIG).  If there is a steady stream of NFS requests that can be served
from cache, an nfsd thread may hold on to a cpu indefinitely, which isn't
very friendly.

So it is good to have a cond_resched in there (just before looking for a
new request to serve), to make sure we play nice.

Signed-off-by: Neil Brown <neilb@suse.de>
Acked-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
NeilBrown 2005-11-15 00:09:10 -08:00 committed by Linus Torvalds
parent fa63b22982
commit 1887b93529
1 changed files with 1 additions and 0 deletions
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1
net/sunrpc/svcsock.c
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@ -1178,6 +1178,7 @@ svc_recv(struct svc_serv *serv, struct svc_rqst *rqstp, long timeout)
arg->tail[0].iov_len = 0;
try_to_freeze();
cond_resched();
if (signalled())
return -EINTR;