afs: Fix order-1 allocation in afs_do_lookup()

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afs_do_lookup() will do an order-1 allocation to allocate status records if
there are more than 39 vnodes to stat.

Fix this by allocating an array of {status,callback} records for each vnode
we want to examine using vmalloc() if larger than a page.

This not only gets rid of the order-1 allocation, but makes it easier to
grow beyond 50 records for YFS servers.  It also allows us to move to
{status,callback} tuples for other calls too and makes it easier to lock
across the application of the status and the callback to the vnode.

Fixes: 5cf9dd55a0 ("afs: Prospectively look up extra files when doing a single lookup")
Signed-off-by: David Howells <dhowells@redhat.com>

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This commit is contained in:

David Howells 2019-05-09 16:17:05 +01:00

parent ffba718e93

commit 87182759cd

5 changed files with 45 additions and 50 deletions

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6

fs/afs/afs.h

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37

fs/afs/dir.c

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21

fs/afs/fsclient.c

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11

fs/afs/internal.h

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20

fs/afs/yfsclient.c

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