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kernel: random page cache fixes

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Matheus
2025-10-13 00:12:24 -03:00
parent 7f9dacedf0
commit 049b9c9ad6
2 changed files with 10 additions and 5 deletions
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kernel-src/fs/vfs.c
+6 -4
View File
@@ -456,12 +456,13 @@ int vfs_write_iovec(vnode_t *node, iovec_iterator_t *iovec_iterator, size_t size
vmmcache_makedirty(page); vmmcache_makedirty(page);
*written += writesize; *written += writesize;
pageoffset += 1;
pagecount -= 1;
if (flags & V_FFLAGS_NOCACHE) if (flags & V_FFLAGS_NOCACHE)
err = writenocache(node, page, pageoffset * PAGE_SIZE); err = writenocache(node, page, pageoffset * PAGE_SIZE);
pageoffset += 1;
pagecount -= 1;
pmm_release(FROM_HHDM(address)); pmm_release(FROM_HHDM(address));
if (err) if (err)
goto leave; goto leave;
@@ -567,14 +568,15 @@ int vfs_read_iovec(vnode_t *node, iovec_iterator_t *iovec_iterator, size_t size,
} }
*bytesread += readsize; *bytesread += readsize;
pageoffset += 1;
pagecount -= 1;
if (flags & V_FFLAGS_NOCACHE) { if (flags & V_FFLAGS_NOCACHE) {
// try to turn it into anonymous memory // try to turn it into anonymous memory
vmmcache_evict(page); vmmcache_evict(page);
} }
pageoffset += 1;
pagecount -= 1;
pmm_release(FROM_HHDM(address)); pmm_release(FROM_HHDM(address));
} }
kernel-src/mm/vmmcache.c
+4 -1
View File
@@ -185,7 +185,10 @@ int vmmcache_getpage(vnode_t *vnode, uintmax_t offset, page_t **res) {
return error; return error;
} }
HOLD_LOCK();
newpage->flags |= PAGE_FLAGS_READY; newpage->flags |= PAGE_FLAGS_READY;
RELEASE_LOCK();
EVENT_SIGNAL(&pagereadyevent); EVENT_SIGNAL(&pagereadyevent);
*res = newpage; *res = newpage;
} }
@@ -335,7 +338,7 @@ int vmmcache_syncvnode(vnode_t *vnode, uintmax_t offset, size_t size) {
page_t *page = vnode->pages; page_t *page = vnode->pages;
page_t *vnodedirtylist = NULL; page_t *vnodedirtylist = NULL;
for (; page; page = page->vnodenext) { for (; page; page = page->vnodenext) {
if (page->offset < offset || page->offset >= top || (page->offset & PAGE_FLAGS_DIRTY) == 0) if (page->offset < offset || page->offset >= top || (page->flags & PAGE_FLAGS_DIRTY) == 0)
continue; continue;
// remove from write list and add to an internal list using the write pointers // remove from write list and add to an internal list using the write pointers