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authorDavid Howells <dhowells@redhat.com>2020-10-22 14:08:23 +0100
committerDavid Howells <dhowells@redhat.com>2020-10-29 13:53:04 +0000
commitf86726a69dec5df6ba051baf9265584419478b64 (patch)
tree0f4a04caa4a282b0a44b4d63b0fca1126dc33868 /include
parent65dd2d6072d393a3aa14ded8afa9a12f27d9c8ad (diff)
afs: Fix afs_invalidatepage to adjust the dirty region
Fix afs_invalidatepage() to adjust the dirty region recorded in page->private when truncating a page. If the dirty region is entirely removed, then the private data is cleared and the page dirty state is cleared. Without this, if the page is truncated and then expanded again by truncate, zeros from the expanded, but no-longer dirty region may get written back to the server if the page gets laundered due to a conflicting 3rd-party write. It mustn't, however, shorten the dirty region of the page if that page is still mmapped and has been marked dirty by afs_page_mkwrite(), so a flag is stored in page->private to record this. Fixes: 4343d00872e1 ("afs: Get rid of the afs_writeback record") Signed-off-by: David Howells <dhowells@redhat.com>
Diffstat (limited to 'include')
-rw-r--r--include/trace/events/afs.h5
1 files changed, 3 insertions, 2 deletions
diff --git a/include/trace/events/afs.h b/include/trace/events/afs.h
index 866fc67d5aa5..4eef374d4413 100644
--- a/include/trace/events/afs.h
+++ b/include/trace/events/afs.h
@@ -986,10 +986,11 @@ TRACE_EVENT(afs_page_dirty,
__entry->priv = priv;
),
- TP_printk("vn=%p %lx %s %zx-%zx",
+ TP_printk("vn=%p %lx %s %zx-%zx%s",
__entry->vnode, __entry->page, __entry->where,
afs_page_dirty_from(__entry->priv),
- afs_page_dirty_to(__entry->priv))
+ afs_page_dirty_to(__entry->priv),
+ afs_is_page_dirty_mmapped(__entry->priv) ? " M" : "")
);
TRACE_EVENT(afs_call_state,

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