shithub: gefs

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mutlk: hold mutation lock for all of the io in the sync operation

--- a/fs.c

+++ b/fs.c

@@ -2343,6 +2343,10 @@

 				ainc(&fs->rdonly);

 				break;

 			}

+

+			if(am->halt)

+				ainc(&fs->rdonly);

+			qlock(&fs->mutlk);

 			for(i = 0; i < fs->narena; i++){

 				a = &fs->arenas[i];

 				qlock(a);

@@ -2361,10 +2365,10 @@

 				epochend(id);

 				epochclean();

 			}

-			if(am->halt)

-				ainc(&fs->rdonly);

+			qunlock(&fs->mutlk);

 			sync();

+			qlock(&fs->mutlk);

 			for(i = 0; i < fs->narena; i++){

 				for(bp = oldhd[i]; bp.addr != -1; bp = nb){

 					epochstart(id);

@@ -2377,6 +2381,8 @@

 					epochclean();

 				}

 			}

+			qunlock(&fs->mutlk);

+

 			if(am->halt){

 				postnote(PNGROUP, getpid(), "halted");

 				exits(nil);