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authorKen Chen <kenchen@google.com>2008-08-20 17:09:17 -0400
committerLinus Torvalds <torvalds@linux-foundation.org>2008-08-20 18:40:32 -0400
commit2d70b68d42b5196a48ccb639e3797f097ef5bea3 (patch)
treeb3040706cd69e0e7bc6d846e08fd91a441b34310 /fs
parent141d87e7debe3334018e46859c7565c44cebda65 (diff)
fix setpriority(PRIO_PGRP) thread iterator breakage
When user calls sys_setpriority(PRIO_PGRP ...) on a NPTL style multi-LWP process, only the task leader of the process is affected, all other sibling LWP threads didn't receive the setting. The problem was that the iterator used in sys_setpriority() only iteartes over one task for each process, ignoring all other sibling thread. Introduce a new macro do_each_pid_thread / while_each_pid_thread to walk each thread of a process. Convert 4 call sites in {set/get}priority and ioprio_{set/get}. Signed-off-by: Ken Chen <kenchen@google.com> Cc: Oleg Nesterov <oleg@tv-sign.ru> Cc: Roland McGrath <roland@redhat.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Jens Axboe <jens.axboe@oracle.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'fs')
-rw-r--r--fs/ioprio.c8
1 files changed, 4 insertions, 4 deletions
diff --git a/fs/ioprio.c b/fs/ioprio.c
index c4a1c3c65aac..da3cc460d4df 100644
--- a/fs/ioprio.c
+++ b/fs/ioprio.c
@@ -115,11 +115,11 @@ asmlinkage long sys_ioprio_set(int which, int who, int ioprio)
115 pgrp = task_pgrp(current); 115 pgrp = task_pgrp(current);
116 else 116 else
117 pgrp = find_vpid(who); 117 pgrp = find_vpid(who);
118 do_each_pid_task(pgrp, PIDTYPE_PGID, p) { 118 do_each_pid_thread(pgrp, PIDTYPE_PGID, p) {
119 ret = set_task_ioprio(p, ioprio); 119 ret = set_task_ioprio(p, ioprio);
120 if (ret) 120 if (ret)
121 break; 121 break;
122 } while_each_pid_task(pgrp, PIDTYPE_PGID, p); 122 } while_each_pid_thread(pgrp, PIDTYPE_PGID, p);
123 break; 123 break;
124 case IOPRIO_WHO_USER: 124 case IOPRIO_WHO_USER:
125 if (!who) 125 if (!who)
@@ -204,7 +204,7 @@ asmlinkage long sys_ioprio_get(int which, int who)
204 pgrp = task_pgrp(current); 204 pgrp = task_pgrp(current);
205 else 205 else
206 pgrp = find_vpid(who); 206 pgrp = find_vpid(who);
207 do_each_pid_task(pgrp, PIDTYPE_PGID, p) { 207 do_each_pid_thread(pgrp, PIDTYPE_PGID, p) {
208 tmpio = get_task_ioprio(p); 208 tmpio = get_task_ioprio(p);
209 if (tmpio < 0) 209 if (tmpio < 0)
210 continue; 210 continue;
@@ -212,7 +212,7 @@ asmlinkage long sys_ioprio_get(int which, int who)
212 ret = tmpio; 212 ret = tmpio;
213 else 213 else
214 ret = ioprio_best(ret, tmpio); 214 ret = ioprio_best(ret, tmpio);
215 } while_each_pid_task(pgrp, PIDTYPE_PGID, p); 215 } while_each_pid_thread(pgrp, PIDTYPE_PGID, p);
216 break; 216 break;
217 case IOPRIO_WHO_USER: 217 case IOPRIO_WHO_USER:
218 if (!who) 218 if (!who)