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venti: fix sync deadlock, add /proc stub

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This commit is contained in:
Russ Cox 2007-10-29 14:33:17 -04:00
parent c5a183de10
commit 45ac814c86
20 changed files with 176 additions and 261 deletions
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12
src/cmd/venti/srv/icachewrite.c
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@ -12,7 +12,7 @@ static void icachewritecoord(void*);
static IEntry *iesort(IEntry*);
int icachesleeptime = 1000; /* milliseconds */
int minicachesleeptime = 50;
int minicachesleeptime = 0;
enum
{
@ -242,18 +242,20 @@ icachewritecoord(void *v)
threadsetname("icachewritecoord");
ix = mainindex;
iwrite.as = diskstate();
iwrite.as = icachestate();
for(;;){
trace(TraceProc, "icachewritecoord sleep");
waitforkick(&iwrite.round);
trace(TraceWork, "start");
as = diskstate();
as = icachestate();
if(as.arena==iwrite.as.arena && as.aa==iwrite.as.aa){
/* will not be able to do anything more than last flush - kick disk */
fprint(2, "icache: nothing to do - kick dcache\n");
trace(TraceProc, "icachewritecoord kick dcache");
kickdcache();
trace(TraceProc, "icachewritecoord kicked dcache");
goto SkipWork; /* won't do anything; don't bother rewriting bloom filter */
}
iwrite.as = as;
@ -271,9 +273,11 @@ icachewritecoord(void *v)
err |= recvul(ix->bloom->writedonechan);
trace(TraceProc, "icachewritecoord donewrite err=%d", err);
if(err == 0)
if(err == 0){
setatailstate(&iwrite.as);
}
}
SkipWork:
icacheclean(nil); /* wake up anyone waiting */
trace(TraceWork, "finish");
addstat(StatIcacheFlush, 1);