The patch titled Subject: ipc: always handle a new value of auto_msgmni has been removed from the -mm tree. Its filename was ipc-always-handle-a-new-value-of-auto_msgmni.patch This patch was dropped because it was merged into mainline or a subsystem tree ------------------------------------------------------ From: Andrey Vagin <avagin@xxxxxxxxxx> Subject: ipc: always handle a new value of auto_msgmni proc_dointvec_minmax() returns zero if a new value has been set. So we don't need to check all charecters have been handled. Below you can find two examples. In the new value has not been handled properly. $ strace ./a.out open("/proc/sys/kernel/auto_msgmni", O_WRONLY) = 3 write(3, "0\n\0", 3) = 2 close(3) = 0 exit_group(0) $ cat /sys/kernel/debug/tracing/trace $strace ./a.out open("/proc/sys/kernel/auto_msgmni", O_WRONLY) = 3 write(3, "0\n", 2) = 2 close(3) = 0 $ cat /sys/kernel/debug/tracing/trace a.out-697 [000] .... 3280.998235: unregister_ipcns_notifier <-proc_ipcauto_dointvec_minmax Fixes: 9eefe520c814 ("ipc: do not use a negative value to re-enable msgmni automatic recomputin") Signed-off-by: Andrey Vagin <avagin@xxxxxxxxxx> Cc: Mathias Krause <minipli@xxxxxxxxxxxxxx> Cc: Manfred Spraul <manfred@xxxxxxxxxxxxxxxx> Cc: Joe Perches <joe@xxxxxxxxxxx> Cc: Davidlohr Bueso <davidlohr@xxxxxx> Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> --- ipc/ipc_sysctl.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) diff -puN ipc/ipc_sysctl.c~ipc-always-handle-a-new-value-of-auto_msgmni ipc/ipc_sysctl.c --- a/ipc/ipc_sysctl.c~ipc-always-handle-a-new-value-of-auto_msgmni +++ a/ipc/ipc_sysctl.c @@ -123,7 +123,6 @@ static int proc_ipcauto_dointvec_minmax( void __user *buffer, size_t *lenp, loff_t *ppos) { struct ctl_table ipc_table; - size_t lenp_bef = *lenp; int oldval; int rc; @@ -133,7 +132,7 @@ static int proc_ipcauto_dointvec_minmax( rc = proc_dointvec_minmax(&ipc_table, write, buffer, lenp, ppos); - if (write && !rc && lenp_bef == *lenp) { + if (write && !rc) { int newval = *((int *)(ipc_table.data)); /* * The file "auto_msgmni" has correctly been set. _ Patches currently in -mm which might be from avagin@xxxxxxxxxx are origin.patch -- To unsubscribe from this list: send the line "unsubscribe mm-commits" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html