writeback: factor out domain_over_bg_thresh to remove repeated code
Factor out domain_over_bg_thresh from wb_over_bg_thresh to remove repeated code. Link: https://lkml.kernel.org/r/20240514125254.142203-4-shikemeng@huaweicloud.com Signed-off-by: Kemeng Shi <shikemeng@huaweicloud.com> Acked-by: Tejun Heo <tj@kernel.org> Cc: Matthew Wilcox (Oracle) <willy@infradead.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
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@ -2116,6 +2116,20 @@ static void wb_bg_dirty_limits(struct dirty_throttle_control *dtc)
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dtc->wb_dirty = wb_stat(wb, WB_RECLAIMABLE);
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dtc->wb_dirty = wb_stat(wb, WB_RECLAIMABLE);
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}
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}
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static bool domain_over_bg_thresh(struct dirty_throttle_control *dtc)
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{
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domain_dirty_avail(dtc, false);
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domain_dirty_limits(dtc);
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if (dtc->dirty > dtc->bg_thresh)
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return true;
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wb_bg_dirty_limits(dtc);
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if (dtc->wb_dirty > dtc->wb_bg_thresh)
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return true;
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return false;
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}
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/**
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/**
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* wb_over_bg_thresh - does @wb need to be written back?
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* wb_over_bg_thresh - does @wb need to be written back?
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* @wb: bdi_writeback of interest
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* @wb: bdi_writeback of interest
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@ -2127,31 +2141,14 @@ static void wb_bg_dirty_limits(struct dirty_throttle_control *dtc)
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*/
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*/
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bool wb_over_bg_thresh(struct bdi_writeback *wb)
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bool wb_over_bg_thresh(struct bdi_writeback *wb)
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{
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{
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struct dirty_throttle_control gdtc_stor = { GDTC_INIT(wb) };
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struct dirty_throttle_control gdtc = { GDTC_INIT(wb) };
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struct dirty_throttle_control mdtc_stor = { MDTC_INIT(wb, &gdtc_stor) };
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struct dirty_throttle_control mdtc = { MDTC_INIT(wb, &gdtc) };
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struct dirty_throttle_control * const gdtc = &gdtc_stor;
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struct dirty_throttle_control * const mdtc = mdtc_valid(&mdtc_stor) ?
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&mdtc_stor : NULL;
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domain_dirty_avail(gdtc, false);
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if (domain_over_bg_thresh(&gdtc))
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domain_dirty_limits(gdtc);
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if (gdtc->dirty > gdtc->bg_thresh)
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return true;
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return true;
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wb_bg_dirty_limits(gdtc);
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if (mdtc_valid(&mdtc))
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if (gdtc->wb_dirty > gdtc->wb_bg_thresh)
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return domain_over_bg_thresh(&mdtc);
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return true;
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if (mdtc) {
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domain_dirty_avail(mdtc, false);
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domain_dirty_limits(mdtc); /* ditto, ignore writeback */
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if (mdtc->dirty > mdtc->bg_thresh)
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return true;
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wb_bg_dirty_limits(mdtc);
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if (mdtc->wb_dirty > mdtc->wb_bg_thresh)
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return true;
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}
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return false;
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return false;
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}
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}
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