Re: 2.6.16-rc3 macromedia flash regression...

[Andrew Morton <akpm@osdl.org>]

Ernst Herzberg <list-lkml@net4u.de> wrote:
>
> .... or not regession, that's the question.
> 
>  2.6.16-rc2 works without problems.
> 
>  With -rc3 a .swf that opens a ip connection back to the server takes ages to 
>  load. strace shows that the player hangs for long times in select().
> 
>  Digging through the changelog brings up
> 
>  commit 643a654540579b0dcc7a206a4a7475276a41aff0
>  Author: Andrew Morton <akpm@osdl.org>
>  Date:   Sat Feb 11 17:55:52 2006 -0800
> 
>      [PATCH] select: fix returned timeval

y'know, when I sent that patch out to reviewers I said "Could you guys
please double-check this like hawks?  Especially the handy-dandy new
timespec/timeval comparison functions.  I invariably screw that sort of
thing up."

Does this help?


diff -puN fs/select.c~select-time-comparison-fixes fs/select.c
--- devel/fs/select.c~select-time-comparison-fixes	2006-02-16 23:17:54.000000000 -0800
+++ devel-akpm/fs/select.c	2006-02-16 23:19:21.000000000 -0800
@@ -404,7 +404,7 @@ asmlinkage long sys_select(int n, fd_set
 			goto sticky;
 		rtv.tv_usec = jiffies_to_usecs(do_div((*(u64*)&timeout), HZ));
 		rtv.tv_sec = timeout;
-		if (timeval_compare(&rtv, &tv) < 0)
+		if (timeval_compare(&rtv, &tv) >= 0)
 			rtv = tv;
 		if (copy_to_user(tvp, &rtv, sizeof(rtv))) {
 sticky:
@@ -471,7 +471,7 @@ asmlinkage long sys_pselect7(int n, fd_s
 		rts.tv_nsec = jiffies_to_usecs(do_div((*(u64*)&timeout), HZ)) *
 						1000;
 		rts.tv_sec = timeout;
-		if (timespec_compare(&rts, &ts) < 0)
+		if (timespec_compare(&rts, &ts) >= 0)
 			rts = ts;
 		if (copy_to_user(tsp, &rts, sizeof(rts))) {
 sticky:
@@ -775,7 +775,7 @@ asmlinkage long sys_ppoll(struct pollfd 
 		rts.tv_nsec = jiffies_to_usecs(do_div((*(u64*)&timeout), HZ)) *
 						1000;
 		rts.tv_sec = timeout;
-		if (timespec_compare(&rts, &ts) < 0)
+		if (timespec_compare(&rts, &ts) >= 0)
 			rts = ts;
 		if (copy_to_user(tsp, &rts, sizeof(rts))) {
 		sticky:
diff -puN fs/compat.c~select-time-comparison-fixes fs/compat.c
--- devel/fs/compat.c~select-time-comparison-fixes	2006-02-16 23:17:54.000000000 -0800
+++ devel-akpm/fs/compat.c	2006-02-16 23:19:33.000000000 -0800
@@ -1757,7 +1757,7 @@ asmlinkage long compat_sys_select(int n,
 			goto sticky;
 		rtv.tv_usec = jiffies_to_usecs(do_div((*(u64*)&timeout), HZ));
 		rtv.tv_sec = timeout;
-		if (compat_timeval_compare(&rtv, &tv) < 0)
+		if (compat_timeval_compare(&rtv, &tv) >= 0)
 			rtv = tv;
 		if (copy_to_user(tvp, &rtv, sizeof(rtv))) {
 sticky:
@@ -1834,7 +1834,7 @@ asmlinkage long compat_sys_pselect7(int 
 			rts.tv_sec++;
 			rts.tv_nsec -= NSEC_PER_SEC;
 		}
-		if (compat_timespec_compare(&rts, &ts) < 0)
+		if (compat_timespec_compare(&rts, &ts) >= 0)
 			rts = ts;
 		copy_to_user(tsp, &rts, sizeof(rts));
 	}
@@ -1934,7 +1934,7 @@ asmlinkage long compat_sys_ppoll(struct 
 		rts.tv_nsec = jiffies_to_usecs(do_div((*(u64*)&timeout), HZ)) *
 					1000;
 		rts.tv_sec = timeout;
-		if (compat_timespec_compare(&rts, &ts) < 0)
+		if (compat_timespec_compare(&rts, &ts) >= 0)
 			rts = ts;
 		if (copy_to_user(tsp, &rts, sizeof(rts))) {
 sticky:
_

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