The patch titled
congestion_wait(): don't wait when there are no pages under writeback
has been removed from the -mm tree. Its filename was
congestion-wait-dont-wait-when-there-are-no-pages-under-writeback.patch
This patch was dropped because it is obsolete
------------------------------------------------------
Subject: congestion_wait(): don't wait when there are no pages under writeback
From: Andrew Morton <akpm@xxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxx>
---
mm/backing-dev.c | 4 ++++
1 file changed, 4 insertions(+)
diff -puN mm/backing-dev.c~congestion-wait-dont-wait-when-there-are-no-pages-under-writeback mm/backing-dev.c
--- a/mm/backing-dev.c~congestion-wait-dont-wait-when-there-are-no-pages-under-writeback
+++ a/mm/backing-dev.c
@@ -1,9 +1,11 @@
+#include <linux/mm.h>
#include <linux/wait.h>
#include <linux/backing-dev.h>
#include <linux/fs.h>
#include <linux/sched.h>
#include <linux/module.h>
+#include <linux/vmstat.h>
static wait_queue_head_t congestion_wqh[2] = {
__WAIT_QUEUE_HEAD_INITIALIZER(congestion_wqh[0]),
@@ -48,6 +50,8 @@ long congestion_wait(int rw, long timeou
DEFINE_WAIT(wait);
wait_queue_head_t *wqh = &congestion_wqh[rw];
+ if (rw == WRITE && global_page_state(NR_WRITEBACK) == 0)
+ return timeout;
prepare_to_wait(wqh, &wait, TASK_UNINTERRUPTIBLE);
ret = io_schedule_timeout(timeout);
finish_wait(wqh, &wait);
_
Patches currently in -mm which might be from akpm@xxxxxxxx are
git-powerpc.patch
git-ia64.patch
git-ieee1394.patch
sata_nv-add-back-some-verbosity-into-adma-error_handler.patch
git-ubi.patch
git-netdev-all.patch
update-smc91x-driver-with-arm-versatile-board-info.patch
drivers-net-ns83820c-add-paramter-to-disable-auto.patch
git-ioat-vs-git-md-accel.patch
ioat-warning-fix.patch
drivers-scsi-mca_53c9xc-save_flags-cli-removal.patch
scsi-cover-up-bugs-fix-up-compiler-warnings-in-megaraid-driver.patch
git-ipwireless_cs.patch
lumpy-reclaim-v4.patch
deprecate-smbfs-in-favour-of-cifs.patch
block_write_full_page-handle-enospc.patch
filesystem-disk-errors-at-boot-time-caused-by-probe.patch
merge-sys_clone-sys_unshare-nsproxy-and-namespace.patch
epoll-optimizations-and-cleanups-tidy.patch
sync_sb_inodes-propagate-errors.patch
mips-convert-to-use-shared-apm-emulation-fix.patch
schedule_on_each_cpu-use-preempt_disable.patch
implement-flush_work-sanity.patch
implement-flush_work_keventd.patch
flush_workqueue-use-preempt_disable-to-hold-off-cpu-hotplug.patch
aio-use-flush_work.patch
kblockd-use-flush_work.patch
relayfs-use-flush_keventd_work.patch
tg3-use-flush_keventd_work.patch
e1000-use-flush_keventd_work.patch
libata-use-flush_work.patch
phy-use-flush_work.patch
extend-notifier_call_chain-to-count-nr_calls-made.patch
eliminate-lock_cpu_hotplug-in-kernel-schedc.patch
move-page-writeback-acounting-out-of-macros.patch
ext2-reservations.patch
aio-is-unlikely.patch
mm-implement-swap-prefetching.patch
readahead-kconfig-options.patch
readahead-minmax_ra_pages.patch
readahead-sysctl-parameters.patch
readahead-context-based-method.patch
readahead-call-scheme.patch
readahead-nfsd-case.patch
make-copy_from_user_inatomic-not-zero-the-tail-on-i386-vs-reiser4.patch
reiser4.patch
nr_blockdev_pages-in_interrupt-warning.patch
device-suspend-debug.patch
slab-leaks3-default-y.patch
vdso-print-fatal-signals-use-ctl_unnumbered.patch
restore-rogue-readahead-printk.patch
put_bh-debug.patch
acpi_format_exception-debug.patch
kmap_atomic-debugging.patch
shrink_slab-handle-bad-shrinkers.patch
squash-ipc-warnings.patch
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