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authorDavid Howells <dhowells@redhat.com>2020-10-28 14:23:46 +0000
committerDavid Howells <dhowells@redhat.com>2021-04-23 10:17:26 +0100
commit67d78a6f6e7b38c1beb7d8c09c6d40f8682e60b1 (patch)
tree1199a284e86dd7e5b4ad03b25006c9a62f78fe08 /fs/afs
parent03ffae909278bd773ae4ce0f15fd8fd77a7b08a4 (diff)
afs: Pass page into dirty region helpers to provide THP size
Pass a pointer to the page being accessed into the dirty region helpers so that the size of the page can be determined in case it's a transparent huge page. This also required the page to be passed into the afs_page_dirty trace point - so there's no need to specifically pass in the index or private data as these can be retrieved directly from the page struct. Signed-off-by: David Howells <dhowells@redhat.com> Tested-By: Marc Dionne <marc.dionne@auristor.com> cc: linux-afs@lists.infradead.org cc: linux-cachefs@redhat.com cc: linux-fsdevel@vger.kernel.org Link: https://lore.kernel.org/r/160588527183.3465195.16107942526481976308.stgit@warthog.procyon.org.uk/ # rfc Link: https://lore.kernel.org/r/161118144921.1232039.11377711180492625929.stgit@warthog.procyon.org.uk/ # rfc Link: https://lore.kernel.org/r/161161040747.2537118.11435394902674511430.stgit@warthog.procyon.org.uk/ # v2 Link: https://lore.kernel.org/r/161340404553.1303470.11414163641767769882.stgit@warthog.procyon.org.uk/ # v3 Link: https://lore.kernel.org/r/161539548385.286939.8864598314493255313.stgit@warthog.procyon.org.uk/ # v4 Link: https://lore.kernel.org/r/161653804285.2770958.3497360004849598038.stgit@warthog.procyon.org.uk/ # v5 Link: https://lore.kernel.org/r/161789087043.6155.16922142208140170528.stgit@warthog.procyon.org.uk/ # v6
Diffstat (limited to 'fs/afs')
-rw-r--r--fs/afs/file.c20
-rw-r--r--fs/afs/internal.h16
-rw-r--r--fs/afs/write.c60
3 files changed, 42 insertions, 54 deletions
diff --git a/fs/afs/file.c b/fs/afs/file.c
index 314f6a9517c7..f1bae0b0a9c0 100644
--- a/fs/afs/file.c
+++ b/fs/afs/file.c
@@ -514,8 +514,8 @@ static void afs_invalidate_dirty(struct page *page, unsigned int offset,
return;
/* We may need to shorten the dirty region */
- f = afs_page_dirty_from(priv);
- t = afs_page_dirty_to(priv);
+ f = afs_page_dirty_from(page, priv);
+ t = afs_page_dirty_to(page, priv);
if (t <= offset || f >= end)
return; /* Doesn't overlap */
@@ -533,17 +533,17 @@ static void afs_invalidate_dirty(struct page *page, unsigned int offset,
if (f == t)
goto undirty;
- priv = afs_page_dirty(f, t);
+ priv = afs_page_dirty(page, f, t);
set_page_private(page, priv);
- trace_afs_page_dirty(vnode, tracepoint_string("trunc"), page->index, priv);
+ trace_afs_page_dirty(vnode, tracepoint_string("trunc"), page);
return;
undirty:
- trace_afs_page_dirty(vnode, tracepoint_string("undirty"), page->index, priv);
+ trace_afs_page_dirty(vnode, tracepoint_string("undirty"), page);
clear_page_dirty_for_io(page);
full_invalidate:
- priv = (unsigned long)detach_page_private(page);
- trace_afs_page_dirty(vnode, tracepoint_string("inval"), page->index, priv);
+ detach_page_private(page);
+ trace_afs_page_dirty(vnode, tracepoint_string("inval"), page);
}
/*
@@ -571,7 +571,6 @@ static void afs_invalidatepage(struct page *page, unsigned int offset,
static int afs_releasepage(struct page *page, gfp_t gfp_flags)
{
struct afs_vnode *vnode = AFS_FS_I(page->mapping->host);
- unsigned long priv;
_enter("{{%llx:%llu}[%lu],%lx},%x",
vnode->fid.vid, vnode->fid.vnode, page->index, page->flags,
@@ -580,9 +579,8 @@ static int afs_releasepage(struct page *page, gfp_t gfp_flags)
/* deny if page is being written to the cache and the caller hasn't
* elected to wait */
if (PagePrivate(page)) {
- priv = (unsigned long)detach_page_private(page);
- trace_afs_page_dirty(vnode, tracepoint_string("rel"),
- page->index, priv);
+ detach_page_private(page);
+ trace_afs_page_dirty(vnode, tracepoint_string("rel"), page);
}
/* indicate that the page can be released */
diff --git a/fs/afs/internal.h b/fs/afs/internal.h
index 1627b1872812..fd437d4722b5 100644
--- a/fs/afs/internal.h
+++ b/fs/afs/internal.h
@@ -875,31 +875,31 @@ struct afs_vnode_cache_aux {
#define __AFS_PAGE_PRIV_MMAPPED 0x8000UL
#endif
-static inline unsigned int afs_page_dirty_resolution(void)
+static inline unsigned int afs_page_dirty_resolution(struct page *page)
{
- int shift = PAGE_SHIFT - (__AFS_PAGE_PRIV_SHIFT - 1);
+ int shift = thp_order(page) + PAGE_SHIFT - (__AFS_PAGE_PRIV_SHIFT - 1);
return (shift > 0) ? shift : 0;
}
-static inline size_t afs_page_dirty_from(unsigned long priv)
+static inline size_t afs_page_dirty_from(struct page *page, unsigned long priv)
{
unsigned long x = priv & __AFS_PAGE_PRIV_MASK;
/* The lower bound is inclusive */
- return x << afs_page_dirty_resolution();
+ return x << afs_page_dirty_resolution(page);
}
-static inline size_t afs_page_dirty_to(unsigned long priv)
+static inline size_t afs_page_dirty_to(struct page *page, unsigned long priv)
{
unsigned long x = (priv >> __AFS_PAGE_PRIV_SHIFT) & __AFS_PAGE_PRIV_MASK;
/* The upper bound is immediately beyond the region */
- return (x + 1) << afs_page_dirty_resolution();
+ return (x + 1) << afs_page_dirty_resolution(page);
}
-static inline unsigned long afs_page_dirty(size_t from, size_t to)
+static inline unsigned long afs_page_dirty(struct page *page, size_t from, size_t to)
{
- unsigned int res = afs_page_dirty_resolution();
+ unsigned int res = afs_page_dirty_resolution(page);
from >>= res;
to = (to - 1) >> res;
return (to << __AFS_PAGE_PRIV_SHIFT) | from;
diff --git a/fs/afs/write.c b/fs/afs/write.c
index 901bd2ee2dd0..babc84dd9719 100644
--- a/fs/afs/write.c
+++ b/fs/afs/write.c
@@ -112,15 +112,14 @@ try_again:
t = f = 0;
if (PagePrivate(page)) {
priv = page_private(page);
- f = afs_page_dirty_from(priv);
- t = afs_page_dirty_to(priv);
+ f = afs_page_dirty_from(page, priv);
+ t = afs_page_dirty_to(page, priv);
ASSERTCMP(f, <=, t);
}
if (f != t) {
if (PageWriteback(page)) {
- trace_afs_page_dirty(vnode, tracepoint_string("alrdy"),
- page->index, priv);
+ trace_afs_page_dirty(vnode, tracepoint_string("alrdy"), page);
goto flush_conflicting_write;
}
/* If the file is being filled locally, allow inter-write
@@ -204,21 +203,19 @@ int afs_write_end(struct file *file, struct address_space *mapping,
if (PagePrivate(page)) {
priv = page_private(page);
- f = afs_page_dirty_from(priv);
- t = afs_page_dirty_to(priv);
+ f = afs_page_dirty_from(page, priv);
+ t = afs_page_dirty_to(page, priv);
if (from < f)
f = from;
if (to > t)
t = to;
- priv = afs_page_dirty(f, t);
+ priv = afs_page_dirty(page, f, t);
set_page_private(page, priv);
- trace_afs_page_dirty(vnode, tracepoint_string("dirty+"),
- page->index, priv);
+ trace_afs_page_dirty(vnode, tracepoint_string("dirty+"), page);
} else {
- priv = afs_page_dirty(from, to);
+ priv = afs_page_dirty(page, from, to);
attach_page_private(page, (void *)priv);
- trace_afs_page_dirty(vnode, tracepoint_string("dirty"),
- page->index, priv);
+ trace_afs_page_dirty(vnode, tracepoint_string("dirty"), page);
}
set_page_dirty(page);
@@ -321,7 +318,6 @@ static void afs_pages_written_back(struct afs_vnode *vnode,
pgoff_t first, pgoff_t last)
{
struct pagevec pv;
- unsigned long priv;
unsigned count, loop;
_enter("{%llx:%llu},{%lx-%lx}",
@@ -340,9 +336,9 @@ static void afs_pages_written_back(struct afs_vnode *vnode,
ASSERTCMP(pv.nr, ==, count);
for (loop = 0; loop < count; loop++) {
- priv = (unsigned long)detach_page_private(pv.pages[loop]);
+ detach_page_private(pv.pages[loop]);
trace_afs_page_dirty(vnode, tracepoint_string("clear"),
- pv.pages[loop]->index, priv);
+ pv.pages[loop]);
end_page_writeback(pv.pages[loop]);
}
first += count;
@@ -516,15 +512,13 @@ static int afs_write_back_from_locked_page(struct address_space *mapping,
*/
start = primary_page->index;
priv = page_private(primary_page);
- offset = afs_page_dirty_from(priv);
- to = afs_page_dirty_to(priv);
- trace_afs_page_dirty(vnode, tracepoint_string("store"),
- primary_page->index, priv);
+ offset = afs_page_dirty_from(primary_page, priv);
+ to = afs_page_dirty_to(primary_page, priv);
+ trace_afs_page_dirty(vnode, tracepoint_string("store"), primary_page);
WARN_ON(offset == to);
if (offset == to)
- trace_afs_page_dirty(vnode, tracepoint_string("WARN"),
- primary_page->index, priv);
+ trace_afs_page_dirty(vnode, tracepoint_string("WARN"), primary_page);
if (start >= final_page ||
(to < PAGE_SIZE && !test_bit(AFS_VNODE_NEW_CONTENT, &vnode->flags)))
@@ -562,8 +556,8 @@ static int afs_write_back_from_locked_page(struct address_space *mapping,
}
priv = page_private(page);
- f = afs_page_dirty_from(priv);
- t = afs_page_dirty_to(priv);
+ f = afs_page_dirty_from(page, priv);
+ t = afs_page_dirty_to(page, priv);
if (f != 0 &&
!test_bit(AFS_VNODE_NEW_CONTENT, &vnode->flags)) {
unlock_page(page);
@@ -571,8 +565,7 @@ static int afs_write_back_from_locked_page(struct address_space *mapping,
}
to = t;
- trace_afs_page_dirty(vnode, tracepoint_string("store+"),
- page->index, priv);
+ trace_afs_page_dirty(vnode, tracepoint_string("store+"), page);
if (!clear_page_dirty_for_io(page))
BUG();
@@ -860,14 +853,13 @@ vm_fault_t afs_page_mkwrite(struct vm_fault *vmf)
*/
wait_on_page_writeback(vmf->page);
- priv = afs_page_dirty(0, PAGE_SIZE);
+ priv = afs_page_dirty(vmf->page, 0, PAGE_SIZE);
priv = afs_page_dirty_mmapped(priv);
- trace_afs_page_dirty(vnode, tracepoint_string("mkwrite"),
- vmf->page->index, priv);
if (PagePrivate(vmf->page))
set_page_private(vmf->page, priv);
else
attach_page_private(vmf->page, (void *)priv);
+ trace_afs_page_dirty(vnode, tracepoint_string("mkwrite"), vmf->page);
file_update_time(file);
sb_end_pagefault(inode->i_sb);
@@ -920,17 +912,15 @@ int afs_launder_page(struct page *page)
f = 0;
t = PAGE_SIZE;
if (PagePrivate(page)) {
- f = afs_page_dirty_from(priv);
- t = afs_page_dirty_to(priv);
+ f = afs_page_dirty_from(page, priv);
+ t = afs_page_dirty_to(page, priv);
}
- trace_afs_page_dirty(vnode, tracepoint_string("launder"),
- page->index, priv);
+ trace_afs_page_dirty(vnode, tracepoint_string("launder"), page);
ret = afs_store_data(mapping, page->index, page->index, t, f, true);
}
- priv = (unsigned long)detach_page_private(page);
- trace_afs_page_dirty(vnode, tracepoint_string("laundered"),
- page->index, priv);
+ detach_page_private(page);
+ trace_afs_page_dirty(vnode, tracepoint_string("laundered"), page);
return ret;
}