mirror of
https://github.com/genodelabs/genode.git
synced 2024-12-29 18:18:54 +00:00
69 lines
1.8 KiB
Diff
69 lines
1.8 KiB
Diff
--- src/lib/dde_rump/src/sys/rump/librump/rumpvfs/vm_vfs.c
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+++ src/lib/dde_rump/src/sys/rump/librump/rumpvfs/vm_vfs.c
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@@ -49,6 +49,7 @@
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struct vm_page **pgs;
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vaddr_t va;
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int pageout = 0;
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+ bool const write = BUF_ISWRITE(bp);
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KASSERT(npages > 0);
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pgs = kmem_alloc(npages * sizeof(*pgs), KM_SLEEP);
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@@ -64,8 +65,47 @@
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KASSERT(uobj == pgs[i]->uobject);
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}
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+ if (bp->b_error) {
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+ if (!write) {
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+ pgs[i]->flags |= PG_RELEASED;
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+ continue;
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+ } else if (bp->b_error == ENOMEM) {
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+ if (pgs[i]->flags & PG_PAGEOUT) {
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+ pageout++;
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+ pgs[i]->flags &= ~PG_PAGEOUT;
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+ }
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+ pgs[i]->flags &= ~PG_CLEAN;
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+
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+ mutex_enter(&uvm_pageqlock);
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+ uvm_pageactivate(pgs[i]);
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+ mutex_exit(&uvm_pageqlock);
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+ }
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+ }
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+
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+ /*
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+ * if the page is PG_FAKE, this must have been a read to
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+ * initialize the page. clear PG_FAKE and activate the page.
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+ * we must also clear the pmap "modified" flag since it may
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+ * still be set from the page's previous identity.
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+ */
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+
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+ if ((pgs[i]->flags & PG_FAKE)) {
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+ KASSERT(!write);
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+ pgs[i]->flags &= ~PG_FAKE;
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+ KASSERT((pgs[i]->flags & PG_CLEAN) != 0);
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+
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+#if defined(READAHEAD_STATS)
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+ pgs[i]->pqflags |= PQ_READAHEAD;
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+ uvm_ra_total.ev_count++;
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+#endif /* defined(READAHEAD_STATS) */
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+
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+ mutex_enter(&uvm_pageqlock);
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+ uvm_pageenqueue(pgs[i]);
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+ pmap_clear_modify(pgs[i]);
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+ mutex_exit(&uvm_pageqlock);
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+ }
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+
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if (pgs[i]->flags & PG_PAGEOUT) {
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- KASSERT((pgs[i]->flags & PG_FAKE) == 0);
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pageout++;
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pgs[i]->flags &= ~PG_PAGEOUT;
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pgs[i]->flags |= PG_RELEASED;
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@@ -81,7 +121,7 @@
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uvm_pagermapout((vaddr_t)bp->b_data, npages);
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uvm_pageout_done(pageout);
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- if (BUF_ISWRITE(bp) && (bp->b_cflags & BC_AGE) != 0) {
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+ if (write && (bp->b_cflags & BC_AGE) != 0) {
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mutex_enter(bp->b_objlock);
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vwakeup(bp);
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mutex_exit(bp->b_objlock);
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