xnu-3247.10.11.tar.gz

[apple/xnu.git] / bsd / hfs / hfs_hotfiles.c

diff --git a/bsd/hfs/hfs_hotfiles.c b/bsd/hfs/hfs_hotfiles.c
index 4cecf72a9717c297e9474be435df2b642c1d3e0e..143bc1983e5479e7f519cddaf532027c2ab27da5 100644 (file)
--- a/bsd/hfs/hfs_hotfiles.c
+++ b/bsd/hfs/hfs_hotfiles.c
@@ -2534,6 +2534,29 @@ hotfiles_adopt(struct hfsmount *hfsmp, vfs_context_t ctx)
                        continue;  /* entry is too big, just carry on with the next guy */
                }
 
+               //
+               // If a file is not an autocandidate (i.e. it's a user-tagged file desirous of
+               // being hotfile cached) but it is already bigger than 4 megs, don't bother
+               // hotfile caching it.  Note that if a user tagged file starts small, gets
+               // adopted and then grows over time we will allow it to grow bigger than 4 megs
+               // which is intentional for things like the Mail or Photos database files which
+               // grow slowly over time and benefit from being on the FastDevice.
+               //
+               if ((hfsmp->hfs_flags & HFS_CS_HOTFILE_PIN) &&
+                   !(VTOC(vp)->c_attr.ca_recflags & kHFSAutoCandidateMask) && 
+                   (VTOC(vp)->c_attr.ca_recflags & kHFSFastDevCandidateMask) && 
+                   (unsigned int)fileblocks > ((4*1024*1024) / (uint64_t)HFSTOVCB(hfsmp)->blockSize)) {
+
+                       vnode_clearfastdevicecandidate(vp);    // turn off the fast-dev-candidate flag so we don't keep trying to cache it.
+
+                       hfs_unlock(VTOC(vp));
+                       vnode_put(vp);
+                       listp->hfl_hotfile[i].hf_temperature = 0;
+                       listp->hfl_next++;
+                       listp->hfl_totalblocks -= listp->hfl_hotfile[i].hf_blocks;
+                       continue;  /* entry is too big, just carry on with the next guy */
+               }
+
                if (fileblocks > hfs_hotfile_cur_freeblks(hfsmp)) {
                        //
                        // No room for this file.  Although eviction should have made space