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authorTobias Klauser <tklauser@distanz.ch>2013-07-29 10:23:48 +0200
committerTobias Klauser <tklauser@distanz.ch>2013-07-29 10:23:48 +0200
commite18e050dfb9a79241bc5169569ce28071353a8c1 (patch)
tree592430e91a3bb42c40b1c388a025e4e4cbd045c9 /mac80211.c
parent4282deb33c39f2990cfd86c3970eecadc56d1abc (diff)
build: Use NACL_{INC,LIB}_DIR set by configure
The environment variables $NACL_INC_DIR/$NACL_LIB_DIR might not always be set, but the configure script will attempt to detect an existing NaCl installation if they aren't. Thus use the $CONFIG_NACL_INC_DIR/$CONFIG_NACL_LIB_DIR variables as emitted by the configure script for the build. Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
Diffstat (limited to 'mac80211.c')
0 files changed, 0 insertions, 0 deletions
generated by cgit v1.2.3-54-g00ecf (git 2.39.0) at 2024-09-28 03:20:46 +0000
example, in a system having 1GB of RAM, a single spinning disk, and a "pass-through" FUSE filesystem mounted over the disk, application code mmapped a 128MB file on the disk and was randomly dirtying pages in that mapping. Because FUSE uses strictlimit and has a default max_ratio of only 1%, in balance_dirty_pages, thresh is ~200, bg_thresh is ~100, and the dirty_freerun_ceiling is the average of those, ~150. So, it pauses the dirtying processes when we have 151 dirty pages and wakes up a background writeback worker. But the worker tests the wrong threshold (200 instead of 100), so it does not initiate writeback and just returns. Thus, balance_dirty_pages keeps looping, sleeping and then waking up the worker who will do nothing. It remains stuck in this state until the few dirty pages that we have finally expire and we write them back for that reason. Then the whole process repeats, resulting in near-zero throughput through the FUSE BDI. The fix is to call the parameterized variant of wb_calc_thresh, so that the worker will do writeback if the bg_thresh is exceeded which was the behavior before the referenced commit. Fixes: 947e9762a8dd ("writeback: update wb_over_bg_thresh() to use wb_domain aware operations") Signed-off-by: Howard Cochran <hcochran@kernelspring.com> Acked-by: Tejun Heo <tj@kernel.org> Signed-off-by: Miklos Szeredi <mszeredi@redhat.com> Cc: <stable@vger.kernel.org> # v4.2+ Tested-by Sedat Dilek <sedat.dilek@gmail.com> Signed-off-by: Jens Axboe <axboe@fb.com>
Diffstat (limited to 'Documentation')