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| author | Xin Yin <yinxin.x@bytedance.com> | 2022-08-25 05:09:45 +0300 |
|---|---|---|
| committer | David Howells <dhowells@redhat.com> | 2022-08-31 18:41:10 +0300 |
| commit | 1122f40072731525c06b1371cfa30112b9b54d27 (patch) | |
| tree | b16e334d8a58b34ef5fbac792f8420f788c731a3 /fs/cachefiles/security.c | |
| parent | c93ccd63b18c8d108c57b2bb0e5f3b058b9d2029 (diff) | |
| download | linux-1122f40072731525c06b1371cfa30112b9b54d27.tar.xz | |
cachefiles: make on-demand request distribution fairer
For now, enqueuing and dequeuing on-demand requests all start from
idx 0, this makes request distribution unfair. In the weighty
concurrent I/O scenario, the request stored in higher idx will starve.
Searching requests cyclically in cachefiles_ondemand_daemon_read,
makes distribution fairer.
Fixes: c8383054506c ("cachefiles: notify the user daemon when looking up cookie")
Reported-by: Yongqing Li <liyongqing@bytedance.com>
Signed-off-by: Xin Yin <yinxin.x@bytedance.com>
Signed-off-by: David Howells <dhowells@redhat.com>
Reviewed-by: Jeffle Xu <jefflexu@linux.alibaba.com>
Reviewed-by: Gao Xiang <hsiangkao@linux.alibaba.com>
Link: https://lore.kernel.org/r/20220817065200.11543-1-yinxin.x@bytedance.com/ # v1
Link: https://lore.kernel.org/r/20220825020945.2293-1-yinxin.x@bytedance.com/ # v2
Diffstat (limited to 'fs/cachefiles/security.c')
0 files changed, 0 insertions, 0 deletions