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Enable afs_DoPartialWrite() and afs_PrefetchChunk() in afs_UFSRead

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and afs_UFSWrite for Linux; fixes deadlock condition for small
cache sizes.
This commit is contained in:
Chas Williams 2002-07-30 20:34:32 +00:00 committed by Nickolai Zeldovich
parent e9a6a53944
commit 4b2be9588b
2 changed files with 9 additions and 13 deletions
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6
src/afs/VNOPS/afs_vnop_read.c
View File

@ -330,7 +330,7 @@ tagain:
*/
if (tdc) {
ReleaseReadLock(&tdc->lock);
#ifndef AFS_VM_RDWR_ENV
#if !defined(AFS_VM_RDWR_ENV) || defined(AFS_LINUX22_ENV)
/* try to queue prefetch, if needed */
if (!noLock) {
afs_PrefetchChunk(avc, tdc, acred, &treq);
@ -559,7 +559,7 @@ afs_UFSReadFast(avc, auio, acred, albn, abpp, noLock)
if (!noLock) {
ReleaseReadLock(&avc->lock);
#ifndef AFS_VM_RDWR_ENV
#if !defined(AFS_VM_RDWR_ENV) || defined(AFS_LINUX22_ENV)
if (!(code = afs_InitReq(&treq, acred))) {
if (!(tdc->mflags & DFNextStarted))
afs_PrefetchChunk(avc, tdc, acred, &treq);
@ -982,7 +982,7 @@ tagain:
*/
if (tdc) {
ReleaseReadLock(&tdc->lock);
#ifndef AFS_VM_RDWR_ENV
#if !defined(AFS_VM_RDWR_ENV) || defined(AFS_LINUX22_ENV)
/* try to queue prefetch, if needed */
if (!noLock) {
if (!(tdc->mflags & DFNextStarted))

16
src/afs/VNOPS/afs_vnop_write.c
View File

@ -297,7 +297,9 @@ afs_MemWrite(avc, auio, aio, acred, noLock)
avc->m.Length = filePos;
}
#endif
#ifndef AFS_VM_RDWR_ENV
ReleaseWriteLock(&tdc->lock);
afs_PutDCache(tdc);
#if !defined(AFS_VM_RDWR_ENV) || defined(AFS_LINUX22_ENV)
/*
* If write is implemented via VM, afs_DoPartialWrite() is called from
* the high-level write op.
@ -306,14 +308,10 @@ afs_MemWrite(avc, auio, aio, acred, noLock)
code = afs_DoPartialWrite(avc, &treq);
if (code) {
error = code;
ReleaseWriteLock(&tdc->lock);
afs_PutDCache(tdc);
break;
}
}
#endif
ReleaseWriteLock(&tdc->lock);
afs_PutDCache(tdc);
}
#ifndef AFS_VM_RDWR_ENV
afs_FakeClose(avc, acred);
@ -618,7 +616,9 @@ afs_UFSWrite(avc, auio, aio, acred, noLock)
}
#endif
osi_UFSClose(tfile);
#ifndef AFS_VM_RDWR_ENV
ReleaseWriteLock(&tdc->lock);
afs_PutDCache(tdc);
#if !defined(AFS_VM_RDWR_ENV) || defined(AFS_LINUX22_ENV)
/*
* If write is implemented via VM, afs_DoPartialWrite() is called from
* the high-level write op.
@ -627,14 +627,10 @@ afs_UFSWrite(avc, auio, aio, acred, noLock)
code = afs_DoPartialWrite(avc, &treq);
if (code) {
error = code;
ReleaseWriteLock(&tdc->lock);
afs_PutDCache(tdc);
break;
}
}
#endif
ReleaseWriteLock(&tdc->lock);
afs_PutDCache(tdc);
}
#ifndef AFS_VM_RDWR_ENV
afs_FakeClose(avc, acred);