ext4: re-enable -o discard functionality in no-journal mode

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This is a revert of commit b56ff9d397, which removed the call to
ext4_issue_discard() to fix a BUG reported because
ext4_issue_discard() was being called from inside a block group
spinlock.  As it turns out this bug had already been fixed by Lukas
Czerner in commit 53fdcf992d by the simple expedient of moving when
we call ext4_issue_discard() outside the spinlock.

So it should be safe to re-enable this functionality, which I tested
by putting an BUG_ON(in_atomic) just after the restored callsite to
ext4_issue_discard().

Addresses-Google-Bug: #6750518

Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Cc: Anatol Pomozov <anatol.pomozov@gmail.com>

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Theodore Ts'o 2012-09-18 13:33:44 -04:00

parent 90b0a97323

commit b5e2368bae

1 changed files with 2 additions and 0 deletions

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fs/ext4/mballoc.c

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