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vmmcache: make dirty page list FIFO

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Matheus
2024-09-11 19:45:35 -03:00
parent e8d28adabe
commit 84ce545cf6
1 changed files with 13 additions and 6 deletions
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kernel-src/mm/vmmcache.c
+13 -6
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@@ -319,6 +319,7 @@ static int syncpage(page_t *page, bool backinglock) {
}
static page_t *dirtylist;
static page_t *dirtylistend;
// expects vnode to be held
int vmmcache_syncvnode(vnode_t *vnode, uintmax_t offset, size_t size) {
@@ -346,6 +347,9 @@ int vmmcache_syncvnode(vnode_t *vnode, uintmax_t offset, size_t size) {
else
dirtylist = page->writenext;
if (dirtylist == NULL)
dirtylistend = NULL;
page->writenext = vnodedirtylist;
page->writeprev = NULL;
vnodedirtylist = page;
@@ -406,6 +410,8 @@ int vmmcache_makedirty(page_t *page) {
page->writenext = dirtylist;
if (dirtylist)
dirtylist->writeprev = page;
else
dirtylistend = page;
dirtylist = page;
pmm_hold(pmm_getpageaddress(page));
@@ -434,8 +440,7 @@ static void writer() {
interrupt_set(true);
for (;;) {
HOLD_LOCK();
// TODO make FIFO rather than LIFO
volatile page_t *page = dirtylist;
volatile page_t *page = dirtylistend;
if (page == NULL) {
EVENT_SIGNAL(&syncevent);
RELEASE_LOCK();
@@ -443,11 +448,13 @@ static void writer() {
continue;
}
dirtylist = page->writenext;
if (dirtylist)
dirtylist->writeprev = NULL;
dirtylistend = page->writeprev;
if (dirtylistend)
dirtylistend->writenext = NULL;
else
dirtylist = NULL;
page->writenext = NULL;
page->writeprev = NULL;
// TODO notify error on vmmcache_syncvnode
syncpage((page_t *)page, true);
}