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vnrehash-avoid-cachecheck-change-20050618

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unlocking and locking lets us race and makes cacheCheck potentially go bad
This commit is contained in:
Derrick Brashear 2005-07-19 15:44:53 +00:00
parent fb1b339a01
commit ea20d8d6c2
1 changed files with 5 additions and 0 deletions
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5
src/vol/vnode.c
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@ -321,6 +321,7 @@ VAllocVnode_r(Error * ec, Volume * vp, VnodeType type)
return NULL; return NULL;
vnodeNumber = bitNumberToVnodeNumber(bitNumber, class); vnodeNumber = bitNumberToVnodeNumber(bitNumber, class);
vnrehash:
VNLog(2, 1, vnodeNumber); VNLog(2, 1, vnodeNumber);
/* Prepare to move it to the new hash chain */ /* Prepare to move it to the new hash chain */
newHash = VNODE_HASH(vp, vnodeNumber); newHash = VNODE_HASH(vp, vnodeNumber);
@ -349,6 +350,10 @@ VAllocVnode_r(Error * ec, Volume * vp, VnodeType type)
VOL_UNLOCK; VOL_UNLOCK;
ObtainWriteLock(&vnp->lock); ObtainWriteLock(&vnp->lock);
VOL_LOCK; VOL_LOCK;
if (vnp->volumePtr->cacheCheck != vnp->cacheCheck) {
ReleaseWriteLock(&vnp->lock);
goto vnrehash;
}
} }
#ifdef AFS_PTHREAD_ENV #ifdef AFS_PTHREAD_ENV
vnp->writer = pthread_self(); vnp->writer = pthread_self();